Digital Commons Network^™

The Following Robot, Juan D. Cerda, Matthew S. Kwan, Vi M. Le

Computer Engineering

The objective of this project is to design, build, and test an autonomous robot with an associated Android application. The robot uses on board inertial measurement sensors (magnetometer, accelerometer, gyroscope) and coordinates itself through Bluetooth communication with the similar built­in measurement sensors on the Android phone to mimic and follow movement. The Following Robot incorporates the same basic movement functionality as a typical RC car. The robot follows the user’s phone through an application on one’s phone. This application accesses the phone’s accelerometer and gyroscope data and translates into appropriate conversions. Methods of tracking and calculating distance or angular displacement …

Modeling Autonomous Vehicles Through Radio Controlled Cars, Eva S. Chen

Computer Engineering

Autonomous vehicles have a lot of potential in improving people’s everyday lives. They could reduce congestion, reduce collisions, enhance mobility, and more. But with these benefits come security and privacy risks. In order to research and test some of these risks, we are building a set of scale autonomous cars that can model autonomous and collaborative behaviors. One such behaviour would be platooning, where a group of vehicles can travel closely together at high speeds by following a lead car. We are doing this with various sensors and control algorithms to allow for future modularity.

Mass Estimation Through Fusion Of Astrometric And Photometric Data Collection With Application To High Area-To-Mass Ratio Objects, Matthew Richardson

Master's Theses

This thesis work presents the formulation for a tool developed in MATLAB to determine the mass of a space object from the fusion of astrometric and photometric data. The application for such a tool is to better model the mass estimation method used for high area-to-mass ratio objects found in high altitude orbit regimes. Typically, the effect of solar radiation pressure is examined with angles observations to deduce area-to-mass ratio calculations for space objects since the area-to-mass ratio can greatly affect its orbital dynamics. On the other hand, photometric data is not sensitive to mass but is a function of …

Characterization Of Flexible Hybrid Electronics Using Stretchable Silver Ink And Ultra-Thin Silicon Die, Joshua A. Ledgerwood

Master's Theses

Flexible Hybrid Electronics (FHEs) offer many advantages to the future of wearable technology. By combining the dynamic performance of conductive inks, and the functionality of ultra-thinned, traditional IC technology, new FHE devices allow for development of applications previously excluded by relying on a specific type of electronics technology.

The characterization and reliability analysis of stretchable conductive inks paired with ultra-thin silicon die in theµm range was conducted. A silver based ink designed to be stretchable was screen printed on a TPU substrate and cured using box oven, conveyor convection oven, and photonic curing processes. Reliability tests were conducted including a …

A Collaborative Web Application Framework For Least Cost Caloric Paths With Constraints On High Resolution Data, Audrey Waschura

Master's Theses

Historically, humans traveling on foot do not travel as the crow flies in a constant direction; rather, they follow the path of least resistance. The path of least resistance could mean avoiding mountain ranges, or following a stretch of terrain or avoiding large bodies of water. These paths are taken because they are easier to traverse and allow the traveler to expend the least amount of energy, or calories. Least cost caloric paths are a more realistic model of how humans travel on foot across terrain. Previous work has been done in computing and visualizing least cost caloric paths. This …

A Live Programming Environment For Python, Noah Negrey

Master's Theses

Learning how to program can be quite difficult. Beginners face two obstacles to learning to program: developing a mental model of the steps of computation and learning the syntax of a programming language. Because programmers are prone to make mistakes that introduce errors into their code, it is important that they understand what each line of code is doing in their program. I propose that a system be built in which writing code and running code happen simultaneously. This system shows the results of code to the user immediately after it is typed; this type of system is called a …

Wing Deflection Analysis Of 3d Printed Wind Tunnel Models, Matthew G. Paul

Master's Theses

This work investigates the feasibility of producing small scale, low aerodynamic loading wind tunnel models, using FDM 3D printing methods, that are both structurally and aerodynamically representative in the wind tunnel. To verify the applicability of this approach, a 2.07% scale model of the NASA CRM was produced, whose wings were manufacturing using a Finite Deposition Modeling 3D printer. Experimental data was compared to numerical simulations to determine percent difference in wake distribution and wingtip deflection for multiple configurations.

Numerical simulation data taken in the form of CFD and FEA was used to validate data taken in the wind tunnel …

Create: Clinical Record Analysis Technology Ensemble, Skylar Eglowski

Master's Theses

In this thesis, we describe an approach that won a psychiatric symptom severity prediction challenge. The challenge was to correctly predict the severity of psychiatric symptoms on a 4-point scale. Our winning submission uses a novel stacked machine learning architecture in which (i) a base data ingestion/cleaning step was followed by the (ii) derivation of a base set of features defined using text analytics, after which (iii) association rule learning was used in a novel way to generate new features, followed by a (iv) feature selection step to eliminate irrelevant features, followed by a (v) classifier training algorithm in which …

Eulerian On Lagrangian Cloth Simulation, Kyle C. Piddington

Master's Theses

This thesis introduces a novel Eulerian-on-Lagrangian (EoL) approach for simulating cloth. This approach allows for the simulation of traditionally difficult cloth scenarios, such as draping and sliding cloth over sharp features like the edge of a table. A traditional Lagrangian approach models a cloth as a series of connected nodes. These nodes are free to move in 3d space, but have difficulty with sliding over hard edges. The cloth cannot always bend smoothly around these edges, as motion can only occur at existing nodes. An EoL approach adds additional flexibility to a Lagrangian approach by constructing special Eulerian on Lagrangian …

The Design, Manufacture, And Testing Of A Novel Adhesion System For A Climbing Vehicle, Michael William Schier

Master's Theses

We present the design and fabrication of a prototype wall-climbing vehicle employing a unique combined locomotion and adhesion system in which the adhesive vacuum is transmitted through moving, perforated treads. Implementing the adhesion/drive system involved a broad range of design challenges, including: developing reliable sealing of sliding and static interfaces, understanding the frictional interactions between the drive treads and various vehicle components and surfaces on which they ride, as well as designing for lightness, manufacturability, and adjustability. The clean sheet design presented in this thesis was taken from concept to functioning prototype in less than 6 months, requiring a considered …

Optimum Design Of Composite Wing Spar Subjected To Fatigue Loadings, Juan Reuben Lazarin

Master's Theses

Composites are now being incorporated into aircraft designs because of their high strength to weight ratio compared to traditional metal materials. Due to the complexity of the material, composite parts are presently being over designed to satisfy static and fatigue requirements. A greater understanding of composite fatigue behavior will allow for even greater weight savings leading to increased fuel economy. A critical part of an aircraft that is subjected to fatigue bending loads are its wings. The forces acting on the wings include its lift distribution, powerplant, and fuel which can be carried in the wing body. When in flight …

"Ye Sons Of Mars": British Representations Of The Sudan Campaign In Print Culture, 1884–1899, Crystal E. Smith

Master's Theses

From 1884 to 1885 the British were first engaged with the Mahdist forces of Sudan in an effort to first rescue the inhabitants of Khartuom, and later to rescue the rescuer Charles “Chinese” Gordon. The affair played out both in Parliament and the newspapers as journalists became the cheerleaders for Empire. My thesis focuses on Britain’s 1884-1890 Sudan Campaign through print culture using political debates, journalism, literature, memoirs, and art. I show how the activism of the press and the romanticism of the larger media reinforced ideas about imperialism and the British role within the Empire at large.

Pscad Modeling And Stability Analysis Of A Microgrid, Kyle R. Hasan

Master's Theses

As power systems are evolving, engineers are facing, and will continue to face, new challenges with respect to maintaining the system in terms of stable operation. Many different forms of generation are becoming prevalent, including; small synchronous generators, photovoltaic generation, and energy storage techniques in the form of battery and ultracapacitor systems. One of the evolutions occurring in the power system is the emergence of microgrids, small power systems capable of isolating from the major power grid in the form of islands. Microgrids use distributed generation to provide power to small communities, and they come with several advantages and disadvantages. …

Investigation Of Peltier Devices For Refrigeration, Evan C. Drake

Physics

The purpose of our project was to characterize Peltier devices and determine if they were good candidates toward inexpensive off-grid solar powered refrigeration in poor countries. We measured the rate of cooling with a constant temperature thermal sink for different current inputs. Through numerous experiments we calculated the coefficient of performance for two different thermoelectric coolers (TECs) through a range of temperature differentials. In addition, we found the lowest temperature these Peltier chips could reach so that we could test the accuracy of the information provided by the manufacturers spec sheets. Overall the data gathered through our research is compelling …

Let's Get Real: Problematizing The Use Of The Real Food Calculator In Large-Scale Food Systems And Exploring Alternatives, Stacey Kathleen Olson

Social Sciences

Food is an essential part of the human existence, because of both nutritional necessity and cultural relevance. Recently, food systems have shifted from their historically local scale to an industrial, global market. In light of shifting consumer consciousness and subsequent demands, there has been an ongoing effort on the part of universities across the United States to make campus food systems more sustainable and just. In 2014, the California State University enacted a system-wide goal of spending 20 percent of campus food procurement budgets on sustainable food by 2020 as per the guiding principles of the Real Food Challenge. This …

Characterization Of Aquarefined Micro/Nanoporous Lead Material, Liam S. Russell, June Y. Suh

Materials Engineering

The process of aquarefining is an environmentally-friendly method for producing pure lead products that exhibit particularly low density. To observe the microstructures of these low-density forms of lead, scanning electron microscopy (SEM) was employed to examine aquarefined lead samples produced under three batches of processing conditions. Due to aquarefined lead's tendency to collapse under its own weight, careful measures were taken during transport and handling to avoid damaging the samples. Three types of microstructures were observed and correlated to changes in processing conditions: octahedron crystallites, microscales, and dendrites. Energy-dispersive x-ray spectrometry (EDS) was used to quantify the amount of oxygen …

The Natural Aging Behavior Of Open-Die-Forged 7050 Aluminum Alloy, Casey J. Madsen, Joseph J. Redfearn

Materials Engineering

The aging response of open-die-forged 7050 aluminum was studied at various temperatures. This is of interest because the alloy can potentially crack during stress relief if it ages after its heat treatment. Natural aging limits the ductility enough to potentially cause cracking and is combatted by placing the forgings in freezers. This experiment shows which temperatures successfully inhibit aging in the forgings. The goal was to develop a maximum time that a sample can be stored at certain temperatures before the forgings have naturally aged. The samples were first solution heat treated then water-quenched. Next, the samples were stored at …

Kinked Tensile Behavior Of Cold Worked Nitinol, Grant R. Caraway, Samuel J. Canovas

Materials Engineering

To characterize the decrease in ductility caused by an induced stress concentration as a function of various levels of cold work and heat treatment, Nitinol medical guide wires with a .004″ diameter were tested using both a standard, straight tensile test and a modified, bent tensile test. The ratio of the two break loads (bent:straight) for identically processed samples was used as a proxy for measuring the ductility of the guide wires: the higher the ratio, the more ductile the sample. The average break load ratio as a function of increased cold work, decreased from 1.27 to 0.91 for the …

Qualification Of Blue Laser Cutting Tool And Design Of Test Procedure For Determining Cutting Parameters, Gaia Righi

Materials Engineering

No abstract provided.

Invariant-Based Method For Improving Efficiency Of Mechanical Testing In Aerospace Certification Of Carbon Fiber-Epoxy Composites, Alyssa Rina Gruezo, Erika Gabrielle Hansen

Materials Engineering

The current challenge with qualification of carbon fiber composites in the aerospace industry would be the low efficiency of testing hundreds of samples. The Trace Theory strives to streamline the qualification process by utilizing a material’s Trace to predict properties of composites using Excel programs and basis data. To test this theory, predicted properties from the program, QuickLam, were compared to experimental data. Unidirectional 0° (T1), unidirectional 90° (T2), quasi-isotropic (T3), and hard quasi-isotropic (T4) laminates were made using HexTowR carbon fiber and TC250 resin provided by TenCate Advanced Composites. Tensile and compression tests were done according to ASTM D3039 …

Rock The Runway Event Proposal, Jamie R. Foxen, Hayley Silva

Communication Studies

EVENT OVERVIEW

We will host a fundraiser to raise money for the non-profit Do It for the Love, by putting on a concert and fashion show. The concert and fashion show not only represent our passions, but will be an effective way to raise as much money as possible while making it an enjoyable experience for our guests. We will have 15-20 silent auction items for guests to bid on. Additionally, we hope to generate funds from the sale of Sextant wine by the glass at the event. This event will be a perfect and unique way to bring together …

Orfalea College Of Business- Fire & Life Safety Analysis, Napoleon E. Nino

Fire Protection Engineering: Culminating Experience Project Reports

This report details the prescriptive and performance based analyses performed on the Orfalea College of Business building, located on the Cal Poly San Luis Obispo campus. Designed in accordance with the 1985 Uniform Building Code (UBC), this building is evaluated for compliance with the requirements prescribed under relevant codes in place as of 2016. The main function of this building is to serve both academic and administrative purposes, including classrooms and staff offices. Aspects of the building analyzed include: Egress Systems, Structural Fire Protection, Smoke Management, Fire Detection, Fire Notification, and Fire Suppression The prescriptive analysis demonstrates the lack of …

Lax Continental Grand- Fire Protection And Life Safety Analysis, Aden Malek Stepanians

Fire Protection Engineering: Culminating Experience Project Reports

A prescriptive analysis of the project building was conducted using the 2016 California Building & Fire Code along with current codes and standards pertaining to specific elements. Encompassed in this analysis is a review of the project building’s structural fire protection, water-based suppression systems, fire detection and alarm systems, smoke control and occupant egress.

Void of construction documentation, the analysis of the structural fire protection of the building was determined by evaluating the current design and use. The restricting factor that determine the construction type was the assembly use on the 6th floor. Other than Type I construction, assembly use …

Trends Within Craft Beer Packaging, Aurelia See

Graphic Communication

While the print industry is facing a changing atmosphere, one thing is as sure as death and taxes— there will always be a market for print within the packaging industry. There is a growing market within the craft beer industry, and with that comes competition for each brewery. Many breweries are finding it difficult to use their beer’s first point of sale, the packaging, to their advantage when attracting consumers to their product. The purpose of this research is to provide the reader with knowledge and insight into package design, with special emphasis on designing for current trends and for …

From Print Propaganda To Meme Activism: The Evolution Of Graphic Communication And Its Effect On Socio-Political Climates And Methods Of Activism, Morgan Grace Gutierrez

Graphic Communication

This project will assess mediums of communication used to create and spread political propaganda, namely from print to digital. The development of graphic communication may provide interesting correlation of how values and ideas are visually represented in society and how the people have reacted to shifting politics. This project is inspired by the recent political climate in the United States, and the continuous impact the media has on the public throughout the many visual forms of communication. Inspiration is also drawn from the advancement of technology in the graphic communication industry. This allows for greater ease of access for the …

Pr Day 2017: Building Campus Relationships: Awareness And Participation For Multidisciplinary Interaction, Jackie Steele

Journalism

The following study investigates the building and maintaining of sustainable relationships between different on-campus department and entities through the collaborative efforts and execution of PR Day. The event was both an awareness and educational campaign aimed at demonstrating what can be done with public relations. The public relations concentration within the Cal Poly Journalism Department, along with the student run PR firm, Central Coast PRspectives (CCPR) are for the most part unknown on campus. The revival of PR Day was developed to raise awareness amongst students on an interdisciplinary level of what public relations is and how it’s relevant to …

Modernizing A Podcast Media Organization Via Social And New Media Rebranding Methods, Randi A. Hair

Journalism

The following study and subsequent public relations campaign is intended to explore the difficulties, opportunities, caveats and all facets of transitioning a traditional travel media organization to new media. It unearths the pitfalls/barriers that naturally occur and aggregate over time when an organization or journalist (specifically “Journeys of Discovery with Tom Wilmer” in this scenario) has not adapted nor altered their practices for changing common practices in the media industries. In this campaign, journalist Thomas Wilmer is seeking to increase his podcast audience and digital presence.

The research conducted for this study is two-fold. Firstly, the research demonstrates best practices …

Design For Waste Reduction And Efficiency Improvement For The Construction Usage Of The Tower Crane, George Merida, Roman Richard

Industrial and Manufacturing Engineering

Webcor Concrete Group’s on-site tower crane is currently experiencing unknown forms of inefficiency. The project team used the DMAIC methodology to implement Define, Measure, Analyze, Improve, and Control in order to guide and structure the project. After the project team formulated a problem statement, observations were collected of tower crane deliveries resulting in 470 individual data points. The data was then analyzed using basic statistics, histograms, and lean manufacturing tools in order to identify wastes and inefficiencies. Once the wastes and inefficiencies were identified, root cause analysis was performed. The identified root causes were then used as the basis for …

Designing An Information System To Efficiently Coordinate Film Screenings, Galen Dougherty

Industrial and Manufacturing Engineering

This paper explains the engineering concepts design efforts used to build an information system to efficiently coordinate film screenings. The market served is an emerging group of film makers and production companies that have limited resources. The application aims to save both time and money in coordination efforts for screening films in the local community. The project case examined is a small production start-up from Cal Poly San Luis Obispo named Yellow Glass Media. The design described in the paper specifically targets their needs which are assumed to be representative of the needs of the larger emerging market. The design …

Low-Cost Jetting System; Space And Naval Warfare Systems Command (Spawar), Carson B. Bush, Daly Sombat, Charles J. Kleeman

Mechanical Engineering

SPAWAR, a research and development side of the U.S. Navy, needed a way to bury classified payloads below the seafloor in order to anchor the devices. They currently use a jetting system that costs around $20,000 to do it, and they desired a cheaper system capable of performing the same tasks. SPAWAR presented the project to Cal Poly Mechanical Engineers as a senior project in the fall of 2016.

The design team that decided to take on the project was interested in creating the system with two key factors in mind in order to make the device less expensive.

1. …