Digital Commons Network^™

Raspberry Pi Vpn Travel Router, Daniel S. Pierson

Computer Science and Software Engineering

Consumers are increasingly relying on public wireless hotspots to access the internet from a growing number of devices. Usage of these hotspots has expanded from just laptops to everything from iPhones to tablets, which are expected to be internet-connected for full functionality. It has become common for one to check if there’s an open wireless hotspot connection available at places like coffee shops, hotels, restaurants, or even a doctor’s waiting room. The issue that arises is that these public connections present an inherent security risk, as anyone can connect and gain access to the network. For increased security, the use …

How-To Understand And Create Hip-Hop Art, Joshua Wolcott

Graphic Communication

Typography is an essential component of Graphic Communication. The purpose of this study was to bridge typography with hip-hop art. To bridge the two disciplines, hip-hop art was presented in the context that it is actually practiced by these artists. The use of a questionnaire and a drawing lesson was intended to bring the subject within its true context. Presenting the art form in its true context enabled participants involved in the study to understand the art form with the perspective that the discipline, like typography, involves the use of lettering. Participants that were interested in drawing were able to …

Fluid Analysis In Solar Heat Pipes, Ben Krumholz, Michael Agavo, William Dundon

Mechanical Engineering

Evacuated tube solar collectors are efficient systems that use heat pipes to facilitate heat transfer. They use incoming solar radiation to heat water. Professor Mason Medizade tasked the team with choosing a component of the system to research and test its influence on system performance. The team investigated the working fluid that runs through the heat pipes. Distilled water, acetone, and ethanol at a range of fill volumes form 1 mL to 11 mL were tested. The team's goal was to find a volume for each fluid to maximize performance of the system. Performance was defined as average temperature rise …

Prosense, Johnny Favazza Ii, Casey Glasgow, Matt Epperson

Computer Engineering

This project aims to gather advanced data sets from MEMS sensors and GPS and deliver it to the user, who can capitalize on the data. The once negligible half-degree difference of your board barreling down a wave can be recorded from a gyro and exploited for the perfect turn. The exact speed dreaded by longboarders where speed wobbles turn into a road rash can be analysed and consequently avoided. Ascertaining the summit of your flight using combined GPS sensors from the ski ramp allows for the correct timing of tricks. When it comes to pursuing excellence in professional sports, amateur …

Musictrakr, Benjamin Lin

Computer Engineering

MusicTrackr is an IoT device that musicians attach to their instruments. The device has a start and stop button that allows users to record their playing sessions. Each recorded session is sent wirelessly to a cloud database. An accompanying website displays all of the recorded sessions, organized by date. After picking a specific date, the user can view graphs showing total practice time and average session length as well play back any recordings during that date. In addition, the user may add comments to any specific date or recording. Lastly, the user may tag a specific date with a color …

Development And Characterization Of Reagent Pencils For Microfluidic Paper Based Analytical Devices, Cheyenne H. Liu

Master's Theses

Microfluidic paper based analytical devices (microPADs) are a novel platform for point of care (POC) diagnostics. Limitations of reagent shelf life have been overcome with the introduction of reagent pencils as a method for solid-based reagent deposition. While useful, little work has been reported on the characterization and optimization of reagent pencils. Herein, an investigation on reagent pencil composition and efficiency is conducted via colorimetric release profile tests utilizing an erioglaucine disodium salt that yields a quantifiable blue colored product in the presence of water. Within this work, an investigation on the molecular weight dependence, polymer chain end functionality, and …

Processing Of Simulated And Experimental Images Of Closely Spaced Binary Stars Using Speckle Interferometry, Niels Smidth

Master's Theses

Theory and methods of processing speckle interferometry data from close visual binary stars are presented and implemented. The effects of the optical systems used for observing close visual binary stars are explained and simulated from both the geometrical and physical optical viewpoints. The atmospheric phase distortion and shot noise responsible for the observed speckle patterns are simulated. The deconvolution technique originally presented by Labeyrie is implemented to extract astrometric data from close visual binary stars. This method is applied to both simulated and experimental data from Kitt Peak National Observatory as validation. Parts of the deconvolution process are optimized to …

Lower Scotts Creek Floodplain And Habitat Enhancement Project, Benjmain O. Cook

Master's Theses

Scotts Creek, located in northern Santa Cruz County, maintains the southernmost persistent population of Central California Coast (CCC) Coho Salmon (endangered) in addition to CCC steelhead (threatened). Fisheries biologists believe overwinter mortality due to lack of refuge habitat is the primary factor limiting salmonid production. Instream rearing habitat may also be limiting, especially during drought years. The legacy effects of historic land use practices, including dredging, wood removal, and the construction of levees, continued to limit refuge and rearing opportunities. A restoration project was implemented to improve refuge and rearing opportunities for salmonids along lower Scotts Creek by removing portions …

Complex Filters As As A Cascade Of Of Buffered Gingell Structures: Design From From Band-Stop Constraints, Samuel Robert Johnston

Master's Theses

This thesis presents an active Complex Filter implementation that that creates a transfer function with with a single real pole and a complex zero. The two-input/two-output network developed in in this thesis responds differently based upon upon the relative phase difference of of the two inputs. If a negative ninety-degree phase difference occurs between the two inputs, the filter will exhibits a bandstop response. While a positive ninety-degree phase difference exhibits a bandpass response. This topology is relatesd to to Gingell’s RC-CR polyphase topology but because of of the use of of op-amps, can be cascadedd without without suffering loading …

Ncma Groundwater Model Using Usgs Modflow-2005/Pest, Brian Matthew Wallace

Master's Theses

A numerical model for the NCMA aquifer complex is presented. The objective of the study is to develop a numerical groundwater model for the NCMA aquifer system to enhance the understanding of subsurface groundwater flow. Infiltration, streamflow, pumping, and return flows are implemented to characterize the aquifer complex over time. The numerical model is calibrated to municipal and monitoring well data, average monthly water balances, and hydraulic contours. Transient aquifer inflows and outflows are assessed in the results of the study and are compared to balance terms from previous studies. The 2007 Todd Engineers Study subsurface inflows and outflows generate …

Concatenative Synthesis For Novel Timbral Creation, James Eric Bilous

Master's Theses

Modern day musicians rely on a variety of instruments for musical expression. Tones produced from electronic instruments have become almost as commonplace as those produced by traditional ones as evidenced by the plethora of artists who can be found composing and performing with nothing more than a personal computer. This desire to embrace technical innovation as a means to augment performance art has created a budding field in computer science that explores the creation and manipulation of sound for artistic purposes. One facet of this new frontier concerns timbral creation, or the development of new sounds with unique characteristics that …

Automating Self Evaluations For Software Engineers, Jonathan Rodrigo A. Miranda

Master's Theses

Software engineers frequently compose self-evaluations as part of employee perfor- mance reviews. These evaluations can be a key artifact for assessing a software engineer’s contributions to a team and organization, and for generating useful feed- back. Self-evaluations can be challenging because a) they can be time consuming, b) individuals may forget about important contributions especially when the review period is long such as a full year, c) some individuals can consciously or unconsciously overstate their contributions, and d) some individuals can be reluctant to describe their contributions for fear of appearing too proud [24].

UNBIASED, Useful New Basic Interactive Automated …

Ymca Operations Manual Development, Devlin Stewart

Industrial and Manufacturing Engineering

The San Luis Obispo YMCA sports department was losing money and overworking their employees due to lack of processes and organizational issues. To address this, a plan was made with the sports director to begin organizing the sports department. This would be done by creating an operations manual for them to organize and consolidate all of their relevant information.

The project was scoped to develop a plan for the YMCA to implement an operations manual. By delivering a work breakdown structure, a gantt chart, and a plan for continuous improvement, the YMCA could use these tools to develop their operations …

Evaluation Of The Effectiveness Of A Prescription Drug Abuse Prevention Curriculum For College Students, Danielle M. Colangelo, Alexis K. Sepulveda

Kinesiology and Public Health

The recreational use of prescription drugs has been increasingly common in university communities (Office of National Drug Control Policy, 2015). Students may abuse prescription drugs to get high, study longer or sleep. A survey conducted by Kinesiology students used snowball sampling to assess the number of Cal Poly students recreationally using prescription drugs and their knowledge of prescription drug abuse (Colangelo & Sepulveda, 2015). The assessment showed 30.7% of students had abused prescription drugs in the last six months. There was an increase in abuse between college freshmen (19.2%), college sophomores (41.4%) and juniors (44.3%) (Colangelo & Sepulveda, 2015). This …

The Elder Scrolls V: Skyrim Stamina Combat Overhaul, Richard Rattner

Liberal Arts and Engineering Studies

No abstract provided.

Let Me Lae-Something On You, Or How I Found My Way Back To Education Through Laes, Robert Sean Myers Ii

Liberal Arts and Engineering Studies

No abstract provided.

Visual Code: Breaking The Binary, Jacob Johannesen, Andrew Adriance

Liberal Arts and Engineering Studies

This project seeks to create an accessible programming language that is more visually based. Although some solutions exist, namely MIT’s Scratch, nothing has caught up to the mobile age. This proj- ect aims to reframe creating a game or app into the context of tell- ing a story, putting character creation first. By researching sto- ry-telling and how people learn, and by applying technical and user interface design knowledge, this project intends to deliver a soft- ware solution that opens introductory coding education to more people.

Accurately Pinpointing 3d Sound In Virtual Environments, Kevin Hongtongsak

Liberal Arts and Engineering Studies

The capabilities of virtual surround sound and lacking compared to its visual counterpart. This disconnect between these two aspects often lead to a less immersive experience in virtual reality. This projects seeks to find a novel solution in creating a realistic virtual surround sound experience using an external software library for the Unity game engine.

Metals Additive Manufacturing Powder Aging Characterization, Thomas Russell Lovejoy, Nicholas Karl Muetterties, David Takeo Otsu

Mechanical Engineering

The metallic additive manufacturing process known as selective laser melting requires highly spherical, normally distributed powder with diameters in the range of 10 to 50 microns. Previous observations have shown a degradation in powder quality over time, resulting in unwanted characteristics in the final printed parts. 21-6-9 stainless steel powder was used to fabricate test parts, with leftover powder recycled back into the machine. Powder samples and test specimens were characterized to observe changes across build cycles. Few changes were observed in the physical and mechanical properties of the specimens, however, there were indications of chemical changes across cycles. Potential …

The Default Art Of Classifying The Occult, Brett B. Bodemer

Library Scholarship

Even as the world of information moves increasingly away from print, academic librarians and patrons spend significant time in neighborhoods of books organized by Library of Congress Classification. Close attention to specific neighborhoods and historical inquiry into their organization opens windows into past and present constructions of knowledge. This essay examines one such neighborhood – the latter ranges of BF, and particularly its tail end, Occult Sciences. It explores the creation of this neighborhood in a deliberately recursive fashion, and the journey to determine how such content came to be collocated by the Library of Congress leads through other classification …

Commercial Vertical Farm Design Phase 1, Tyler Tappin, Bryan Gomes

Architectural Engineering

Until recent years, vertical farming, or urban agriculture, has usually been referred to as more of a science fiction concept than a realistic means of production. However, it is becoming increasingly apparent that these urban crop­growing structures are not only technologically feasible, but efficient. These structures are entering the realm of economic feasibility as well, appearing in niche markets near large cities. Most of the facilities, however, are generally restricted in size to single­story buildings. The objective of this project was to design a multi story structure that would be well­equipped to house a large vertical farming operation. Some of …

Spontaneous Parametric Down-Conversion In A Beta Barium Borate Crystal, Nicholas Williams

Physics

No abstract provided.

Low Cost Metal Chip Separator, Alek Linquist, Kale Mckinney, Ryan Jones

Mechanical Engineering

We were tasked by Micro-Vu to design, build, and test a small-scale low-cost metal chip separator to operate on one of their 24/7 mills. The goal of the project was to separate the steel and aluminum chips coming off of the mill’s chip conveyor to end up with a bin of 99% pure aluminum by mass. To accomplish this goal we first brainstormed various possible ideas and performed small scale tests the best ones. After further review we determined the best solution to this problem was a design that involved a cycling magnetic backing that would pull steel out of …

Experimental Building Demonstration Model With Viscous Fluid Dampers, Blake Thomas Reeve, Brianna Jean Kufa, Aden Malek Stepanians, Sophie Carmion Ratkovich

Architectural Engineering

The Architectural Engineering major places a heavy emphasis on structural dynamics and the role of wind and seismic loading in building analysis and design. Buildings of high importance that are critical to community function, such as hospitals, often utilize supplemental damping devices like supplemental viscous fluid dampers or base isolators to reduce the overall demands on the structural system. The design and analysis of these dampers are typically not taught at the undergraduate level, and is frequently performed by mechanical engineers, in lieu of structural engineers.

To better understand and research building behavior with supplemental damping devices, our multi-disciplinary team …

Roborodentia Xxi Robot, Jose A. Villa

Computer Engineering

This report covers the design and implementation of a robot built to compete in Roborodentia 2016.

Cashtag Ios Application, Kevin J. Tsui

Computer Science and Software Engineering

An iOS Application meant to help manage cash purchases/transactions.

Analysis Of Electromagnetic Launcher Design And Modeling, Garrett Ross Germany

Master's Theses

This thesis derives working expressions from electromagnetic physical laws to gain a deeper understanding of the nature of railguns. The expressions are refined for ease of use and then compared to electromagnetic simulators that solve complex equations that arise from different rail geometry. Further simplifications lead to an expression for the final velocity of the projectile and showcase the importance of the system resistance to projectile flux gain ratio. A Simulink simulation then incorporates the resulting non-linear differential equations and approximates the projectile velocity over time based on physical dimensions and material properties. Some equations derived can be found in …

Zebra Crosswalk Detection Assisted By Neural Networks, Jason David Banich

Master's Theses

It can be difficult to guide yourself across a crosswalk when your visual capabilities are limited, which can be an everyday issue for someone with impaired vision. This paper aims to alleviate that issue for zebra stripe crosswalks by proposing an algorithm that incorporates multiple properties of zebra stripe crosswalks with a neural network to assist in quickly and accurately identifying a crosswalk in video and pictures taken from a smartphone camera.

This method improves the accuracy of zebra crosswalk detection in images. In a large dataset, it correctly identified 76.5% of zebra crosswalks, while reducing the false discovery rate …

After The Paris Agreement: How India Can Use Climate Financing To Implement A Sustainable Clean Cookstove Program, Hannah Kornfeld

Master's Theses

The burning of biomass for cooking purposes without proper ventilation and filters poses a massive health and climate risk. Health implications from exposure to household air pollution from this type of fuel impacts women and children in many developing countries, who spend many hours a day cooking and gathering fuel. Climate implications from burning solid biomass results in increased carbon dioxide and black carbon emissions, which contribute to global climate change. This thesis aims to explore the issues associated with biomass cookstoves in terms of both health and climate, and seeks to understand how a new national clean cookstove program …

Sysml Based Cubesat Model Design And Integration With The Horizon Simulation Framework, Shaun Luther

Master's Theses

This thesis examines the feasibility of substituting the system input script of Cal Poly’s Horizon Simulation Framework (HSF) with a Model Based Systems Engineering (MBSE) model designed with the Systems Modeling Language (SysML). A concurrent student project, SysML Output Interface Creation for the Horizon Simulation Framework, focused on design of the HSF Translator Plugin which converts SysML models to an HSF specific XML format. A SysML model of the HSF test case, Aeolus, was designed. The original Aeolus HSF input script and the translated SysML input script retained the format and dependency structure required by HSF. Both input scripts …