Digital Commons Network^™

Informing The Creation Of A Financial Literacy Tool For Cal Poly Students, Kelly Michelle Carroll

Communication Studies

This research project examines the wants, needs, and desires of Cal Poly students to inform the creation of a financial literacy tool (tentatively named “MoneySmart”) to be created by another student. The methodologies used to gauge these metrics were a literature review and questionnaire. The literature review aids in understanding research regarding the current state of student financial literacy in the United States, including student attitudes toward the topic. Subsequent findings were used to create the questionnaire, which inquired about students’ financial stress, confidence in their abilities to manage their personal finances, specific interests for the design and contents of …

Heavenly Bodies Rsvp, Justin Tyler Spitzer, Allison Jean Turnbaugh, Jack William Boulware, Braden Alex Lockwood

Mechanical Engineering

The purpose of the Heavenly Bodies RSVP project was to design and fabricate planet props, as well as a mechanism by which they could be raised and lowered in California Polytechnic State University’s Pavilion theater. The project team was comprised of four fourth year mechanical engineering students: Allison Turnbaugh, Braden Lockwood, Jack Boulware, and Justin Spitzer. We conducted extensive research to determine the ideal solution for the design problem brought to us by our sponsor. In our analysis, we discovered that the most important aspects of our design were the absolute reliability of the system, fire retardant material selection, and …

Elevate Dental, Connor Merrick, Everett Johnson, Jonah Holbrook

Mechanical Engineering

During a dental procedure, patients are often required to have a bite block placed in their mouths to keep them open for the duration of their procedure. These can be very uncomfortable for patients due to lack of properly-fitting sizes. This project presents an alternative fully adjustable bite block that is affordable, comfortable, and easy to use for dental personnel.The bite block is a two piece side loading design that uses interlocking teeth to supply a range of five sizes.

Automated Drone Calibration System, Jackie Kelly Jong-Mee Paik, Zach Nathan Richter, Tyler Wilson Van Den Berg, Ryan Alexander Zhan, Matthew Ward Carlson

Mechanical Engineering

The final design review of the Inspired Flight Calibration Team senior project will detail the process used to complete a verification prototype of a drone calibration device and discuss lessons learned and suggestions for improving this device. Going from brainstorming and conceptual prototyping all the way through verification prototyping and testing, we were able to design a gyroscopic device that met Inspired Flight’s needs for the flight sensor calibration of their drones. The mechanical design involved comprehensive CAD models and hands-on manufacturing. The mechatronics side of the project worked heavily with electrical wiring and writing custom software to communicate and …

Wearable Heart Sound And Ekg Recorder, Grace R. Larson

Master's Theses

Acute congestive heart failure is a leading cause of morbidity and mortality. Patients often undergo repeated hospitalizations with an annual cost in excess of $32B dollars. Early detection of impending acute congestion allows for pharmaceutical interdiction that prevents hospitalization, improves outcomes, and reduces healthcare spending. A subcutaneous implantable monitoring device that detects impending acute congestive heart failure by using heart sounds may provide a valuable tool that can be used to titrate heart failure medications to prevent acute heart failure requiring hospitalization. The device may be used to measure changes in the intervals between the R-wave and S1 and S2 …

Design Of A Martian Communication Constellation Of Cubesats, Scott J. Pirkle

Master's Theses

Spacecraft operating on the Martian surface have used relay satellites as a means of improving communication capabilities, mainly in terms of bandwidth and availability. However, the spacecraft used to achieve this have been large spacecraft (1000s of kilograms) and were not designed with relay capability as the design priority. This thesis explores the possibility of using a CubeSat-based constellation as a communications network for spacecraft operating on the Martian surface. Brute-force techniques are employed to explore the design space of possible constellations. An analysis of constellation configurations that provide complete, continuous coverage of the Martian surface is presented. The stability …

Development And Characterization Of An Iot Network For Agricultural Imaging Applications, Jacob D. Wahl

Master's Theses

Smart agriculture is an increasingly popular field in which the technology of wireless sensor networks (WSN) has played a large role. Significant research has been done at Cal Poly and elsewhere to develop a computer vision (CV) and machine learning (ML) pipeline to monitor crops and accurately predict crop yield numbers. By autonomously providing farmers with this data, both time and money are saved. During the past development of a prediction pipeline, the primary focuses were CV and ML processing while a lack of attention was given to the collection of quality image data. This lack of focus in previous …

Distance Estimation Using Ofdm Signals For Ultrasonic Positioning, Kyman Huang

Master's Theses

This paper describes a method of estimating distance via Time-of-Flight (TOF) measurement using ultrasonic Orthogonal Frequency Division Multiplexing (OFDM) signals. Using OFDM signals allows the signals and their sub-carriers to remain orthogonal to each other while continuously transmitting. This estimation method is based on the change of phase of a traveling wave as it propagates through a medium (air for ultrasonic signals). By using signals containing multiple tones, the phase change between each frequency component is slightly different. This phase difference is dependent on the distance traveled and can thus be used to estimate distance. This paper studies the impact …

Design, Validation, And Verification Of The Cal Poly Educational Cubesat Kit Structure, Nicholas B. Snyder

Master's Theses

In this thesis, the development of a structure for use in an educational CubeSat kit is explored. The potential uses of this kit include augmenting existing curricula with aspects of hands on learning, developing new ways of training students on proper space systems engineering practices, and overall contributing to academic capacity building at Cal Poly and its collaborators. The design improves on existing CubeSat kit structures by increasing accessibility to internal components by implementing a modular backplane system, as well as adding the ability to be environmentally tested. Manufacturing of the structure is completed with both additive (Fused Deposition Modeling …

Bootstrapping Massively Multiplayer Online Role Playing Games, Mitchell Miller

Master's Theses

Massively Multiplayer Online Role Playing Games (MMORPGs) are a prominent genre in today's video game industry with the most popular MMORPGs generating billions of dollars in revenue and attracting millions of players. As they have grown, they have become a major target for both technological research and sociological research. In such research, it is nearly impossible to reach the same player scale from any self-made technology or sociological experiments. This greatly limits the amount of control and topics that can be explored. In an effort to make up a lacking or non-existent player-base for custom-made MMORPG research scenarios A.I. agents, …

Innovation In A Housing Crisis: Addressing Moderate Income Housing, Paul Wladyslaw Chytla-Hinze

City and Regional Planning

Innovation in a Housing Crisis: Addressing Moderate Income Housing surveys city-level, as well as regional innovations, that aim to address the shortage of moderate income housing throughout the Bay Area region. This project will explore how these innovations can serve to address the moderate income housing shortage into the future, and will use Redwood City, and the Bay Area, as the local and regional models of the affordable housing crisis.

Towards Security And Privacy In Networked Medical Devices And Electronic Healthcare Systems, Isabel Jellen

Master's Theses

E-health is a growing eld which utilizes wireless sensor networks to enable access to effective and efficient healthcare services and provide patient monitoring to enable early detection and treatment of health conditions. Due to the proliferation of e-health systems, security and privacy have become critical issues in preventing data falsification, unauthorized access to the system, or eavesdropping on sensitive health data. Furthermore, due to the intrinsic limitations of many wireless medical devices, including low power and limited computational resources, security and device performance can be difficult to balance. Therefore, many current networked medical devices operate without basic security services such …

Design Of An Electrospray Thruster Power Processing And Digital Control Interface Unit, Douglas Howe

Master's Theses

Electrospray thrusters are low thrust, high specific impulse electric propulsion devices with applications in precision attitude control of space vehicles and efficient propulsion of small spacecraft platforms. These devices operate by electrostatically extracting particles from the surface of ionic liquid propellants and accelerating them away from the vehicle at high speed. Unlike more conventional propulsion technologies which only require electronics for control and regulation, electrospray thruster systems require extensive electronics to operate. The power processing unit (PPU) is a device used to produce the high voltage levels required to operate an electrospray thruster and to measure its operating parameters. The …

Fast Chirped Signals For A Tdma Ultrasonic Indoor Positioning System, Lauren M. Williams

Master's Theses

In this paper, a new concept for ultrasonic indoor positioning based on instantaneous frequency of ultrasonic signals is presented. Nonlinear phase characteristics of ultrasonic transducers introduce a frequency deviation in ultrasonic signals. By sweeping at very fast rates, a large spike in the deviation is introduced. The artefacts observable in instantaneous frequency estimations are highly localized and present an opportunity for accurate frequency detection. In order to be useful, the artefacts need to take place within the pulse and have sufficient magnitude for accurate processing. The system consists of a transducer transmitter and receiver pair, which have a center frequency …

Writing For Each Other: Dynamic Quest Generation Using In Session Player Behaviors In Mmorpg, Sean Christopher Mendonca

Master's Theses

Role-playing games (RPGs) rely on interesting and varied experiences to maintain player attention. These experiences are often provided through quests, which give players tasks that are used to advance stories or events unfolding in the game. Traditional quests in video games require very specific conditions to be met, and for participating members to advance them by carrying out pre-defined actions. These types of quests are generated with perfect knowledge of the game world and are able to force desired behaviors out of the relevant non-player characters (NPCs). This becomes a major issue in massive multiplayer online (MMO) when other players …

Initial Orbit Determination Error Analysis Of Low-Earth Orbit Rocket Body Debris And Feasibility Study For Debris Cataloguing From One Optical Facility, Kyle Stoker

Master's Theses

This paper is predicated on determining the effectiveness of angles-only initial orbit determination (IOD) methods when limited observational data is available for low-Earth orbit (LEO) rocket body debris. The analysis will be conducted with data obtained from Lockheed Martin Space’s Space Object Tracking (SpOT) facility, focusing on their observational data from 2018 that contains tracking of rocket body debris for less than one minute per overhead pass. After the IOD accuracies are better understood, a feasibility study will follow that investigates the possibility of cataloguing LEO orbital debris from a single optical observation facility with similar observational capabilities as that …

Design Of A Custom Wrist Brace That Can Be 3d Printed From A Three-Dimensional Scan, James D. Baldwin

Master's Theses

Current arm bracing and casting methods for distal forearm and wrist fractures can lead to varying negative medicinal affects such as tightness, skin breakdown and bacteria growth which can cause infection. This can be alleviated by a flexibly compliant and breathable design while keeping the arm and hand fixed at the wrist to promote proper wrist and forearm fracture healing. There have been attempts made to create a 3D printable brace from a three-dimensional scan but they do not account for full encapsulation of the wrist, removability without breaking the brace, nor for the brace being too tight and leading …

Investigation Of Experimental Variation Of Bovine Sphingomyelin As A Novel Ingredient For Ultraviolet Protection, Esther Chen

Master's Theses

Skin cancer is a prevalent disease that globally affects 2-3 million people per year [1]. This number is expected to grow tenfold as depletion of the ozone layer contributes to harsher rays reaching Earth’s surface [2]. A common way to protect against those ultraviolet waves is to apply sunscreen, however, recent reports call into question the safety of some active ingredients as they can enter through the skin into the bloodstream [3]. This thesis aims to investigate an alternative solution that uses bovine sphingomyelin (BSM) as photoprotective solution against UV irradiation.

In order to evaluate the effectiveness of BSM against …

Pocket Rocket: A 1u+ Propulsion System Design To Enhance Cubesat Capabilities, James M. Harper

Master's Theses

The research presented provides an overview of a 1U+ form factor propulsion system design developed for the Cal Poly CubeSat Laboratory (CPCL). This design utilizes a Radiofrequency Electrothermal Thruster (RFET) called Pocket Rocket that can generate 9.30 m/s of delta-V with argon, and 20.2 ± 3 m/s of delta-V with xenon. Due to the demand for advanced mission capabilities in the CubeSat form factor, a need for micro-propulsion systems that can generate between 1 – 1500 m/s of delta-V are necessary.

By 2019, Pocket Rocket had been developed to a Technology Readiness Level (TRL) of 5 and ground tested in …

Host Plant Resistance In Strawberries To Anthracnose And Colonization Of Crown And Root Tissue By Verticillium Dahliae And Macrophomina Phaseolina, Omar A. Gonzalez-Benitez

Master's Theses

Strawberries are considered an important crop in California where in 2018 it was in the top 5 valued fruit and vegetable commodities valued at $2.84 billion accounting for 88% of the total U.S. production. Strawberry production can be severely impacted by soilborne pathogens that can affect strawberry roots, crowns and leaves which can result in plant mortality. As much as 50 to 60% mortality can occur in one field. Pathogens responsible for such losses include Colletotrichum acutatum (syn.C. nymphaeae), Macrophomina phaseolina and Verticillium dahliae. With the phaseout of methyl bromide, host resistance and an understanding of host-pathogen interactions …

The Strawberry Rhizosphere Microbiome: Role On Plant Health And Nutrition, Eric Michael Boyd

Master's Theses

Microbial-root associations are important to help plants cope with abiotic and biotic stressors. Managing these interactions offers an opportunity for improving the efficiency and sustainability of agricultural production. By characterizing the bacterial and archaeal community (via 16S rRNA sequencing) associated with the bulk and rhizosphere soil of sixteen strawberry cultivars in two controlled field studies, we explored the relationships between the soil microbiome and plant resistance to two soilborne fungal pathogens of strawberry (Verticillium dahliae and Macrophomina phaseolina). Overall, the plants had a distinctive rhizosphere microbiome relative to the bulk soil, with higher abundances of known beneficial bacteria …

Barriers To Success: Sheep And Goat Producers In The Service-Grazing Industry, Erin A. Campbell-Craven

Master's Theses

Service-grazing is a novel term for grazing done on land not owned or rented by a livestock producer or manager, for the purpose of land management, and for which the owner or land manager receiving grazing services pays compensation to the service provider. This research project seeks to gather detailed information about producers in the Western United States, providing grazing services under this project’s definition of “service-grazing”, with a focus on those operating in California, in order to discover the business models or practices necessary to be successful within a service-based grazing operation. To this end, an online survey consisting …

Evaluation Of Trigger Efficiency Of The Alice Fit Detector Using Pythia, Abdulrahman Kauther

Physics

The Fast Interaction Trigger detector is a trigger detector that informs which events are recorded by A Large Ion collider Experiment at the Large Hadron Collider. In the present study, we evaluate the geometric trigger efficiency of FIT. We do so via simulations of collision events, using PYTHIA 8.2 along with a filtering algorithm, which determines which products of collisions are within the regions covered by FIT. We control different acceptance conditions and calculate the efficiency accordingly. We find that the efficiency decreases at low multiplicity, high particle threshold, and conditions where both sides of FIT are hit by particles.

Display Significance At Planes Of Fame Air Museum, Callie Ann Maloney

Social Sciences

History museums record and memorialize deeply affecting historical events. They offer opportunities to enhance and build on the history taught. Displayed artifacts and memorabilia can narrate significant stories from the past and provide an educational background. This paper is about the Planes of Fame Air Museum and the focus is on ways that they have significantly memorialized their collection of rare warbirds. I begin by providing background information about the founder and how his visions led him to building a successful aviation museum. The vision of Planes of Fame is to preserve aviation history through the restoration and flying of …

21st Century Policing: Building Trust And Communication, Tyler Merritt Schilling

Social Sciences

My Senior Project was inspired by my desire to become a law enforcement officer and was framed with President Obama’s 21^st Century Task Force Report on Policing. I provide an overview of the literature on 21^st Policing, focusing on Pillar I: Building Trust and Legitimacy. In collaboration with another senior, we hosted a Community Policing Town Hall Forum to address students’ concerns about policing on campus, in SLO, and in other cities across the country. Survey data was collected before and after the event to gauge students’ attitudes towards police and to see how they evaluated the town …

The Subaltern Magazine, Rebecca Fox, Riese Nichols

Social Sciences

The Subaltern intends to reach Cal Poly students who do not feel as if their voices are heard and allow them the platform to share their stories. Our focus is on unheard stories from our campus - whether this involves race, class, gender identity, mental health, ethnicity, culture, or any unique part of one’s identity or experience. We hope that these stories will begin to shed light on what we usually consider “taboo” topics and allow students to feel as if they aren’t alone.

Being a very homogeneous campus, it is important for us to realize that privileged voices are …

The Effect Of Communication Medium On Mental Health Outcomes, Brooke Emily Lyon

Communication Studies

This study examined which form of mental health treatment was considered to be most appealing if an individual is seeking help for a mental health related concern. Furthermore, it detected which communication media was perceived to make people feel the most comfortable, bring the most benefits to mental health, and was the easiest to access when it comes to mental health treatment. This study utilized a posttest-only experimental design to manipulate the different images of communication media that participants saw during the context of a hypothetical therapy session (face-to-face, group, or digital application). Following the experiment, differences amongst groups were …

Building B: Fire And Life Safety Analysis, Joseph Radford Sellers

Fire Protection Engineering: Culminating Experience Project Reports

A fire and life safety analysis was performed on Building B at the Y-12 National Security Complex in Oak Ridge, TN. This report was completed as a fulfillment of one of the requirements for the Masters of Science in Fire Protection Engineering Program from the California Polytechnic State University (Cal Poly) in San Luis Obispo, CA. The analysis consisted of a prescriptive, or code-based analysis, and a performance-based analysis.

The prescriptive analysis composed of four main areas: Life Safety, Fire Alarm and Detection, Structural Fire Protection, and Fire Suppression. The prescriptive analysis was performed to determine if Building B is …

Military Maintenance Hangar, Eliot Jordan

Fire Protection Engineering: Culminating Experience Project Reports

This report describes the building code compliance of a military aircraft hangar. The facility is evaluated for both prescriptive code compliance and for a performance-based compliance via the use of design fires analyzed with computer programs Fire Dynamics Simulator (FDS) and occupant egress analyzed with Pathfinder software as well as hand calculations utilizing Excel.

The prescriptive code analysis is done based upon a combination of Unified Facilities Criteria, International Building Code, and NFPA 101 codes and standards. Prescriptive compliance was checked against the building non separated occupancies of S-1 and B. The building was evaluated for building construction type IIB. …

Fire Protection Analysis: Engineering Iv, Building 192, Cal Poly State University, San Luis Obispo, Paul Jenkins

Fire Protection Engineering: Culminating Experience Project Reports

This report is an analysis of the fire protection capabilities of Engineering IV (Building 192) at Cal Poly University in San Luis Obispo, CA. The overall objective of this report was to assess whether the building and its fire protection systems supported the evacuation of occupants from the building in a safe manner before conditions became untenable during a fire event. The assessment was accomplished by performing a prescriptive and performance analysis.

The purpose of the prescriptive analysis was to determine whether the building egress components and fire protections systems were designed, built, and installed in compliance with all the …