Engineering Commons^™

The Estimation Of Modal Shift Potential For A New Form Of Dial-A-Ride Service, Banihan Gunay, Kadir Akgol, Ingmar Andréasson, Serdal Terzi

Journal of Public Transportation

The concept of a dynamic and flexible Intelligent Subscription Bus Service (I-Service) was developed, and two integrated questionnaires were conducted among the commuters of a large university campus. To determine travel times to the campus by I-Service, a digital urban road network map with travel time databases was produced, and software was developed to calculate optimum routes using these databases. Travel times for each participant were determined by the shortest travel time principle. The proposed hypothetical service was introduced to participants, and anticipated advantages for each participant were reported back to them by means of a second questionnaire to determine …

Temperature And Strain Measurements With Fiber Optic Sensors For Steel Beams Subjected To Fire, Yi Bao, Yizheng Chen, Matthew S. Hoehler, Christopher M. Smith, Matthew F. Bundy, Genda Chen

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This paper presents measurements of high temperatures using a Brillouin scattering based fiber optic sensor and large strains using an extrinsic Fabry-Perot interferometric sensor for assessing the thermo-mechanical behaviors of simply supported steel beams subjected to combined thermal and mechanical loading. The distributed fiber optic sensor captures detailed, non- uniform temperature distributions that are compared with thermocouple measurements resulting in an average relative difference of less than 5 % at 95 % confidence level. The extrinsic Fabry- Perot interferometric sensor captures large strains at temperatures above 1000 C. The strain results measured from the distributed fiber optic sensors and extrinsic …

Inclusive Lectern, Trent Canales, Sean Day, Dylan Sigley, Stephen Sippel

Mechanical Engineering

A lectern is an essential piece of equipment for almost all speeches and presentations. They come in many forms and range in degree of professionalism depending on the occasion. Lecterns not only hold a presenter’s notes, a microphone, or other presentation aids, they provide a structure for a presenter that can bolster their confidence during a presentation. As such, it is important that all presenters have a lectern available to them. Unfortunately this is not always the case due to lectern accessibility limitations. This problem inspired the Cal Poly Disability Resource Center to request a lectern that satisfies the Least …

Variable Electron Applicator, Alex Choi, Jacqueline Dulken, Gabriel Kardener, Nelson Lin

Mechanical Engineering

No abstract provided.

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 …

Biomimetic Seal Flipper Test Rig, Gordon D. Belyea, Laura Kawashiri, Dylan Rinker, Kurt Beske

Mechanical Engineering

No abstract provided.

Cp Ev Dynamics, Steven Montevideo, Ashlie Reott, L. Carter Price

Mechanical Engineering

No abstract provided.

Ancillary Attachment Methods, Creed Borden, Mickey Mackle, Thomas Tolley

Mechanical Engineering

No abstract provided.

Magnetic Bearing For Bently Nevada Rk4 Rotor Kits, Sean Fowler, Garrett Olson

Mechanical Engineering

Active Magnetic Bearings (AMB) are contact free bearings that support loads by magnetic levitation. This is accomplished by generating magnetic forces with electric current through a series of electromagnets surrounding a suspended rotor mass. Along with a set of electromagnets, an AMB assembly also consists of power amplifiers for each electromagnet, a controller, and proximity sensors. The proximity sensors provide rotor position feedback to the control system, which modulates power to the amplifiers [4]. Magnetic bearings are used in several industrial applications today, including but not limited to compressors, turbines, pumps, motors, and generators. Advantages of their utility include very …

Transit Seating, Luke Mielke, Chris San Nicolas, Jon Rich, Sam Thompson

Mechanical Engineering

No abstract provided.

Pet Food Monitor Using The Raspberry Pi, Kimberly Aguero

Computer Engineering

Computer system built on a Raspberry Pi that will monitor the levels of food in a pet food bowl. If it detects that there is no food in the bowl, it will notify the user via email or text.

Sun Watch 3.0, Eli Backer

Computer Engineering

The Sun Watch was a part of Eli Backer's portfolio in applying to Masters of Fine Art programs around the country. It is a typical-looking wristwatch that does not give the time, but the position of the sun in the sky via a row of LEDs along the edge of the device. It is programmable with a custom programming board that uses pogo-pins to make reliable contact. In using the device, it is the designer's hope that the user will become less addicted to time.

The Story Of Beyoncé: The Roborodentia 2016 Contestant, Brandon Arnold, Mana Kulkarni, Aaron Newberg, Jon Sleep

Computer Engineering

No abstract provided.

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 …

Senior Project: Control System For An Underwater Remotely Operated Vehicle, Tyler Mau, Joseph Mahoney

Computer Engineering

No abstract provided.

El Capitán: Cal Poly Rose Float Digital Drive System, Gregory Raffi Baghdikian

Computer Engineering

In today’s world of smartphones, self-driving cars, and internet-connected coffee makers, it seems as if computers are contained in everything around us. These “embedded systems” have become critical components of our lives, improving everything about the things they control, from cost, to speed, to simplicity. One area that embedded systems has hardly gained a foothold is in the world of floatbuilding. Most of the floats in the Tournament of Roses Parade, including the one built jointly by Cal Poly San Luis Obispo and Cal Poly Pomona, are technologically very simple, using mostly analog components and rudimentary discrete digital logic to …

Build-A-Board, Christopher Messerer, Brian Holland

Computer Engineering

The purpose of this project is to build a single board computer that will be able to run Linux and provide some expansion capabilities in the form of GPIO, USB, etc. This single board computer will have all the components that a fully functional computer has but with a much smaller form factor and overall capabilities.

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 …

Oluso, Diego Fernandez, Tyler Heucke, Nishant Mattu, Michael Roesch

Computer Engineering

Oluso is a new startup offering affordable, inexpensive technology to empower the individual. Our product is designed to keep the user in contact with someone close to them in emergency situations. Over the course of the past several months we have performed interviews with both individuals who may be interested in this product as well as organizations who may be interested in purchasing this product for their members. Our product is nearing completion and all of the companies we have interviewed have displayed a significant amount of interest in our product. The combination of easy communication and peace of mind …

Rapid Battery Exchange Automation, Andrea Everson

Computer Engineering

With the drastic threat of exhausting the world’s fossil fuels, society has been scrambling to find alternative forms of energy for transportation. One of these viable options is an electric vehicle powered by batteries. While this idea is fairly viable, consumers are looking to have the same experience with an electric car than they would with a gas-powered vehicle. One of their major concerns is the lack of range in an electric vehicle.

This project aims to present a solution that would extend the range by allowing users to quickly go from low battery to fully charged battery by performing …

Modeling And Python Scripting In Maya For The Animation Short Style, Gilenn Emille G. Collado

Computer Engineering

The computer animation and graphics industry has dramatically improved over the years alongside the growth of technology. This paper discusses how that came about through a specific tool called Maya. It talks about its features and what it can create for you and the world. It also describes how scripting can simplify a job and make more of it. It highlights the effectiveness of the ability to manipulate code to create something amazing.

Optical Bistability In A Vcsel Coupled To Serially-Connected Pin Photodiodes Quantizer Device, Sanaz Faryadras

Graduate Theses - Physics and Optical Engineering

In this work we investigated the structure and performance of vertical cavity surface emitting lasers (VCSEL) which will be used in building an optical quantizer. In any p-i-n structure, capacitance is the most important factor in deciding the highest modulation speed. Therefore, components with smaller capacitance would show higher switching speed. A novel electrical quantizer was constructed using two identical 850 nm Finisar VCSELs, which could manifest electrical switching up to 1.4 MHz. Also, a new electrical quantizer was built with two Eudyna PIN photodiodes (PD-PD), which works at higher frequencies up to 8 MHz, comparing to previous works. The …

Calcium Phosphate As A Key Material For Socially Responsible Tissue Engineering, Vuk Uskoković, Victoria M. Wu

Pharmacy Faculty Articles and Research

Socially responsible technologies are designed while taking into consideration the socioeconomic, geopolitical and environmental limitations of regions in which they will be implemented. In the medical context, this involves making therapeutic platforms more accessible and affordable to patients in poor regions of the world wherein a given disease is endemic. This often necessitates going against the reigning trend of making therapeutic nanoparticles ever more structurally complex and expensive. However, studies aimed at simplifying materials and formulations while maintaining the functionality and therapeutic response of their more complex counterparts seldom provoke a significant interest in the scientific community. In this review …

The Design And Construction Of A Rear Bumper With Incorporated Spare Tire Rack, Alan C. Isaacson

BioResource and Agricultural Engineering

This senior project outlines the design and construction of a rear bumper with incorporated spare tire and equipment rack for a 1946 Willys CJ2A Jeep. The spare tire rack is capable of swinging out away from the vehicle to allow for the use of the vehicle’s tailgate. The bumper was designed for strength, functionality and aesthetic qualities alike. Additionally, the bumper design considered all vehicle codes and regulations.

Surface Modification Of Polycrystalline Diamond Compacts By Carbon Ion Irradiation, Madhu S. K. Mutyala, Lianyi Chen, Ting Chiang Lin, Benjamin R. Maier, Beata Tyburska, Kumar Sridharan, Kornel Ehmann, Xiaochun Li

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Selective modification (e.g. defect creation and amorphization) of diamond surfaces is of interests for functional diamond-based semiconductors and devices. Bombarding the diamond surface with high energy radiation sources such as electron, proton, and neutrons, however, often result in detrimental defects in deep bulk regions under the diamond surface. In this study, we utilized high energy carbon ions of 3 MeV to bombard the polycrystalline diamond compact (PDC) specimen. The resultant microstructure of PDCs was investigated using micro Raman spectroscopy. The results show that the carbon bombardment successfully created point defects and amorphization in a shallow region of ∼500 nm deep …

Why I Don't Weld In Computer Labs, Mark Deegan

Level 3

Until very recently, like many people in DIT, I had never even seen a welding laboratory. To listen to me now, you’d swear I was raised with a welding torch in my hand. That’s not the case, but when I moved jobs in September 2015, I discovered that DIT runs evening courses in welding, so I decided to sign up. Way back, when I was in college, the greatest threat to life-and-limb was either an alcoholinduced idiot injury, or at worst, the risk of burning myself with a soldering Iron. They get pretty hot, sometimes as hot as 215°C. That …

Factors Influencing Demand For Buses Powered By Alternative Energy Sources, Janer Galván, Victor Cantillo, Julian Arellana

Journal of Public Transportation

Transit buses consume high amounts of fossil fuels, with the consequent release of greenhouse gases into the atmosphere. In recent decades, much effort has been concentrated on the development of cleaner fuels to mitigate this externality. However, market shares for cleaner-fueled buses are still modest, which is why it is relevant to evaluate the aspects influencing their acceptance. This article presents an econometric model to evaluate factors influencing demand for transit buses in Colombia powered by cleaner fuels. For this purpose, a stated preference survey was applied to public transportation entrepreneurs. Results suggest that the target population considers acquisition cost …

A Composite Index For Evaluating Transit Service Quality Across Different User Profiles, Juan De Oña, Rocio De Oña, Francisco Diez-Mesa, Laura Eboli, Gabriella Mazzulla

Journal of Public Transportation

This paper evaluates the quality of service of the metropolitan Metro of Seville (Spain) across different user profiles, as determined through cluster analysis. Service quality evaluation is performed using a composite index that combines the user point of view with the service operator point of view. The combination of these two types of service quality measurement fulfils the need to provide a reliable measurement tool for transit performance. Six user profiles were identified, and it was ascertained that they have different opinions about the service, with heterogeneous gaps between the points of view among the six user profiles.

Examining Bus Lost Time Dynamics For A Bus Rapid Transit Station, Ankit Kathuria, M. Parida, Ch. Ravi Sekhar, Manu Pathak

Journal of Public Transportation

Bus Rapid Transit (BRT) systems are considered to be the most effective alternative for solving urban transportation problems for both developed and developing countries. The conventional approach to estimate dwell time (DT) is based on traditional DT models derived for normal bus stops, but not for modern BRT stations. BRT stations are different from bus stops in terms of length of platform, multiple loading areas, and number of passengers handled. Therefore, understanding dwell time dynamics, including the recently-introduced component of Bus Lost Time (BLT), is important to improve the operations of BRT systems. This research introduces various possible scenarios of …

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 …