Engineering Commons^™

Poly Drop, Zachary T. Scott, Lilly J. Paul

Computer Engineering

Poly Drop is a software interface to control an Open Drop digital micro-fluidics system. We obtained a hardware system from Gaudi labs. Our task was to create a Graphical User Interface that made the control of the device easier and more automated for better testing. We created software that had 3 parts: a control GUI, arduino code to control the hardware, and Image Analysis that gives the user information such as location and color of liquid drops as they move across the electrode grid of the Open Drop system. The GUI was developed using Java Swing. The communication between the …

Warren J. Baker Center For Science Building Review, John Pagliero

Fire Protection Engineering: Culminating Experience Project Reports

This report is a focused review and discussion of the life safety and fire protection design of Cal Poly Building 180: The Warren J. Baker Center for Science in partial fulfillment for the requirements of a Master’s of Science degree in Fire Protection Engineering at Cal Poly, San Luis Obispo. The report focuses on discussion areas specific to the curriculum of the Cal Poly Fire Protection Master’s program, including analysis of egress, structural fire protection, detection, alarm and automatic protection designs in comparison to current and effective codes and standards. This report also includes a, performance based, tenability analysis for …

Los Angeles Air Force Base Fitness Center, Colin White

Fire Protection Engineering: Culminating Experience Project Reports

The purpose of this report is to evaluate the life safety features of the Los Angeles Air Force Base Fitness Center, located on Los Angeles Air Force Base in El Segundo, California. This report is produced in partial fulfillment of the requirements of a Master’s of Science in Fire Protection Engineering from the Fire Protection Engineering Program at California Polytechnic State University’s San Luis Obispo Campus. This analysis approaches life safety in the fitness center from two angles. First, a prescriptive approach is used to evaluate the building’s compliance with current codes and standards that govern construction and maintenance of …

Maumus Center- Fire Protection Engineering Analysis, Tyler Mobley

Fire Protection Engineering: Culminating Experience Project Reports

This report is a fire protection engineering analysis of the Maumus Center, a science center and planetarium, in Arabi, Louisiana. The objective of this analysis is to outline the code defined requirements and to confirm the minimum level of safety from fire is attained. Analyzed in the report are the design requirements prescribed in the adopted building and life safety codes, and the performance of the prescribed design. The prescriptive review addresses the building construction in regards to fire protection, the means of egress, the water‐based fire suppression system, and the fire alarm system. The performance review incorporates the goals …

Recreation Center- Cal Poly- Fire And Life Safety Analysis, Hao Yan

Fire Protection Engineering: Culminating Experience Project Reports

This report discusses the fire and life safety analysis of the existing fire protection features installed in the Recreation Center building on the California Polytechnic State University. The analysis is conducted using two different approaches, the prescriptive analysis of the building and the performance-based design analysis.

The prescriptive analysis approach will examine installed fire protection features and systems in accordance with the International Building Code, such as structural fire protection, water-based suppression system, alarm and detection system, egress system, smoke control, and fire safety management plan. The egress system failed when the old gym area was used as a fixed …

Acme Semiconductor Foundry- Fab Expansion- Fire Protection Engineering Analysis Report, Jacob Epstein

Fire Protection Engineering: Culminating Experience Project Reports

The ACME Semiconductor Foundry – Fab Expansion is a new four story addition to an existing four story foundry facility. The Fab Expansion is approximately 154,500 square feet in footprint area that is connected to an existing four-story Fab Building. This report has been prepared to identify the building’s fire protection and life safety features that must be provided in accordance with the applicable codes and standards. The ACME Semiconductor Fab Expansion will contain multiple separated uses and will be required to be constructed with Type I-B construction. Building Construction Documents are provided in Appendix A showing compliance with the …

การวิเคราะห์ผลกระทบการนำเข้าเหล็กต่อเศรษฐกิจไทย, สุมาลี สุขดานนท์

Journal of Transportation and Logistics (TRANSLOG)

การวิเคราะห์ผลกระทบการนำเข้าเหล็กต่อเศรษฐกิจไทยเป็นการศึกษาความสัมพันธ์เชิงเหตุ และผลระหว่างมูลค่าการนำเข้าเหล็ก กับผลผลิตมวลรวมของภาคการขนส่ง และผลผลิตมวลรวมระดับ ประเทศ ว่าส่งผลซึ่งกันและกันอย่างมีนัยสำคัญทางสถิติหรือไม่ โดยวิธีการทดสอบจะใช้วิธี Granger's Causality โดยใช้ข้อมูลระหว่างปี 2543 - 2557 ซึ่งผลการศึกษาพบว่ามูลค่าการนำเข้าเหล็กนั้น ไม่ส่งผลต่อการเปลี่ยนแปลงของผลผลิตมวลรวมทั้งในภาคขนส่งและประเทศอย่างมีนัยสำคัญทางสถิติ แต่การเปลี่ยนแปลงผลผลิตมวลรวมในภาคการขนส่งและประเทศจะส่งผลต่อมูลค่าการนำเข้าเหล็ก ในกลุ่มดังกล่าว นัยดังกล่าวนำไปสู่ข้อเสนอแนะว่าภาครัฐควรปรับเปลี่ยนการดำเนินนโยบายเพื่อให้ ต้นทุนเหล็กลดต่ำลง อันจะเป็นการเพิ่มผลผลิตมวลรวมให้ทั้งภาคขนส่งและเศรษฐกิจของประเทศ

Further Cost Reduction Of Battery Manufacturing, Amir A. Asif, Rajendra Singh

Publications

The demand for batteries for energy storage is growing with the rapid increase in photovoltaics (PV) and wind energy installation as well as electric vehicle (EV), hybrid electric vehicle (HEV) and plug-in hybrid electric vehicle (PHEV). Electrochemical batteries have emerged as the preferred choice for most of the consumer product applications. Cost reduction of batteries will accelerate the growth in all of these sectors. Lithium-ion (Li-ion) and solid-state batteries are showing promise through their downward price and upward performance trends. We may achieve further performance improvement and cost reduction for Li-ion and solid-state batteries through reduction of the variation in …

Data‐Enabled Cognitive Modeling: Validating Student Engineers’ Fuzzy Design‐Based Decision‐Making In A Virtual Design Problem, Golnaz Arastoopour Irgens, Naomi C. Chesler, Jeffrey Linderoth, David Williamson Shaffer

Publications

The ability of future engineering professionals to solve complex real‐world problems depends on their design education and training. Because engineers engage with open‐ended problems in which there are unknown parameters and multiple competing objectives, they engage in fuzzy decision‐making, a method of making decisions that takes into account inherent imprecisions and uncertainties in the real world. In the design‐based decision‐making field, few studies have applied fuzzy decision‐making models to actual decision‐making process data. Thus, in this study, we use datasets on student decision‐making processes to validate approximate fuzzy models of student decision‐making, which we call data‐enabled cognitive modeling. The results …

Enhancing Anaerobic Digestion Of Food Waste Through Biochemical Methane Potential 1 Assays At Different Substrate: Inoculum Ratios, Shakira R. Hobbs, Amy E. Landis, Bruce E. Rittmann, Michelle N. Young, Prathap Parameswaran

Publications

Food waste has a high energy potential that can be converted into useful energy in the form of methane via anaerobic digestion. Biochemical Methane Potential assays (BMPs) were conducted to quantify the impacts on methane production of different ratios of food waste. Anaerobic digester sludge (ADS) was used as the inoculum, and BMPs were performed at food waste:inoculum ratios of 0.42, 1.42, and 3.0 g chemical oxygen demand/g volatile solids (VS). The 1.42 ratio had the highest CH4-COD recovery: 90% of the initial total chemical oxygen demand (TCOD) was from food waste, followed by ratios 0.42 and 3.0 at 69% …

Tensile Properties Of High-Strength Connecting Rod Bolts, Leland K. Lam

Materials Engineering

Oliver Racing Parts (ORP) is looking to optimize the manufacturing process for high-strength connecting rod bolts. A high yield strength is desired for the bolts because deformation would result in a loss of engine performance. A high tensile strength is also necessary to prevent catastrophic failure if deformation occurs. A high ductility as a proxy for toughness is attractive for resisting crack nucleation and growth during cyclic loading. Bolts were made of MP35N, a nickel-cobalt multiphase alloy; MLX-17, a precipitation hardenable stainless steel; 8740, a low alloy steel; and H11, a chromium hot-work tool steel. The temperature of the most …

Straightening Of Investment Casting Ni-Based Superalloys, Silvia Squillaci, Janessa Cabrera

Materials Engineering

Samples belonging to four different designs of afterburner flaps, available in the as-cast, solutionized and aged conditions, underwent 4-point bend testing to fracture to investigate straightening. The average maximum load values of the second design samples in the as-cast, solutionized and aged conditions were respectively 33 kN, 29 kN and 27 kN. Regarding the fourth design samples, the average maximum load for the as-cast, solutionized and aged conditions were respectively 23 kN, 28 kN, and 25 kN. The other parameter measured during testing was the maximum extension at fracture. All as-cast samples belonging to the second design fractured at values …

Mechanical Testing Protocol For Characterizing Composite Lamina Pre-Pregs, Kenneth Blain Ainslie, Joshua Gustav Brinkmann

Materials Engineering

Zodiac Aerospace currently employs finite element analysis (FEA) computer models to predict the material behavior of its composite products. The objective of this project was to develop a testing protocol for obtaining detailed material property data to use in these FEA models. With accurate material data, FEA models can reduce the need for expensive physical testing and achieve timely troubleshooting when testing complex components. The specific material characterized in this project was an 8-satin weave fiberglass phenolic pre-preg used as the facesheet material in many of Zodiac’s sandwich panel composites. The developed testing protocol involved mechanical testing of lamina and …

Effect Of Composition And Build Direction On Additively Manufactured Hastelloy X Alloys, Justin A. Spitzer, Jeffrey T. Schloetter, Sarah Zerga

Materials Engineering

Microcracking has caused premature failure and reduction in properties in additively manufactured (AM) Hastelloy X. The purpose of this research is to meet or exceed the mechanical properties of wrought Hastelloy X by modifying the composition and build direction of Hastelloy X manufactured using Direct Metal Deposition (DMD). Tensile testing, scanning electron microscopy (SEM), and metallography were performed on the samples. ANOVA was used to analyze the dependence that the properties had on build direction and composition. The nominal composition wrought samples had a yield strength of 310.1 MPa and a 60.79% Elongation. Alloy P60-X18 in a horizontal build had …

Comparison Of Intrusive And Non-Intrusive Methods For Corrosion Monitoring Of Fuel Processing Systems, Armando Jacob Espinoza, Thomas Conner Field

Materials Engineering

This presentation contains an assessment of the best overall corrosion monitoring device, intrusive or non-intrusive, for use in the petrochemical industry. Corrosion in the petrochemical industry is a large issue because it causes a deterioration of pipe integrity in fuel processing systems. A reduction of pipe wall integrity due to corrosion could result in a leak or an explosion of fuel processing lines since those systems function at high pressures. The use of corrosion monitoring systems in the petrochemical industry helps to detect early signs of corrosion prior to failure so that proper maintenance can be performed to prevent catastrophe. …

Investigation Of A Method To Determine Mechanical Properties Of Integral Composite Hinges For Application In Foldable Skis, Jada Evers, Kathryn Johnson

Materials Engineering

No abstract provided.

Predicting Service Life Of 347 Stainless Steel Pipes By Carburization Rate Measurement, Tyler L. Sura

Materials Engineering

Chevron Corporation and other refiners face challenges predicting the service life of piping in coker furnaces. This is largely due to a build up coke on a single surface of the piping. This coke build up results in carbon penetration into the surface of the 347 stainless steel used for the pipes. Carbon penetration can lead to degradation of the surface and ultimately, the failure of the pipe. Current modeling software has difficulty predicting the influence of sulfur on the carbon penetration rate. This study aims to provide a baseline for further study into the subject. The carbon penetration rate …

Development Of Low Cost Braze Alloys For Aerospace Applications, Alyssa M. Elliott, Sandy Babich, Blake Whitmee

Materials Engineering

Non-precious metal braze alloys can help lower the cost of brazing, which is a commonly-used joining process in the aerospace industry. A-286, a stainless steel superalloy, and Inconel© 718, a nickel-based superalloy, are both commonly used alloys at Aerojet Rocketdyne. Both alloys were brazed into butt joints using nickel-based braze alloys: AMS 4776, 4777, and 4778. The brazed samples were machined into a modified version of the ASTM E8 subsize specimen samples and tensile tested to compare the strength and calculated elongation of the brazed samples to the base metals’ properties. All of the brazed samples fractured at the joint, …

The Soil Moisture Velocity Equation, Fred L. Ogden, Myron B. Allen, Wencong Lai, Jianting Zhu, Mookwon Seo, Craig C. Douglas, Cary A. Talbot

Publications

Numerical solution of the one-dimensional Richards' equation is the recommended method for coupling groundwater to the atmosphere through the vadose zone in hyperresolution Earth system models, but requires fine spatial discretization, is computationally expensive, and may not converge due to mathematical degeneracy or when sharp wetting fronts occur. We transformed the one-dimensional Richards' equation into a new equation that describes the velocity of moisture content values in an unsaturated soil under the actions of capillarity and gravity. We call this new equation the Soil Moisture Velocity Equation (SMVE). The SMVE consists of two terms: an advection-like term that accounts for …

Normalization-Invariant Fuzzy Logic Operations Explain Empirical Success Of Student Distributions In Describing Measurement Uncertainty, Hamza Alkhatib, Boris Kargoll, Ingo Neumann, Vladik Kreinovich

Departmental Technical Reports (CS)

In engineering practice, usually measurement errors are described by normal distributions. However, in some cases, the distribution is heavy-tailed and thus, not normal. In such situations, empirical evidence shows that the Student distributions are most adequate. The corresponding recommendation -- based on empirical evidence -- is included in the International Organization for Standardization guide. In this paper, we explain this empirical fact by showing that a natural fuzzy-logic-based formalization of commonsense requirements leads exactly to the Student's distributions.

A Survey Of Addictive Software Design, Chauncey J. Neyman

Computer Science and Software Engineering

The average smartphone owner checks their phone more than 150 times per day. As of 2015, 62% of smartphone users had used their phone to look up information about a health condition, while 57% had used their phone to do online banking. Mobile platforms have become the dominant medium of human-computer interaction. So how have these devices established themselves as our go to connection to the Internet? The answer lies in addictive design. Software designers have become well versed in creating software that captivates us at a primal level. In this article, we survey addictive software design strategies, their bases …

An Analysis Of Heroku And Aws For Growing Startups, Colton B. Stapper

Computer Science and Software Engineering

This project presents information on the architecture of most modern cloud-hosting platforms, and gives a cost-benefit analysis of two common Platform-as-a-Service (PaaS) companies: Heroku and AWS.

Djukebox: A Mobile Application Senior Project, Alexander M. Mitchell

Computer Science and Software Engineering

I’m going to discuss the process used to research, design, and develop a mobile application to handle song requests from patrons to disc jockeys. The research phase was completed in the first half of the project, during CSC-491, along with much of the design. The rest of the design and all of the development was completed during CSC-492. Once development began there were times when reverting back to the design phase was needed, which became apparent as more was learned about the mobile platform chosen for development, Android, and the backend server utilized, Google Firebase. Ultimately the project was purely …

Slither.Io Deep Learning Bot, James Caudill

Computer Engineering

Recent advances in deep learning and computer vision techniques and algorithms have inspired me to create a model application. The game environment used is Slither.io. The system has no previous understanding of the game and is able to learn its surroundings through feature detection and deep learning. Contrary to other agents, my bot is able to dynamically learn and react to its environment. It operates extremely well in early game, with little enemy encounters. It has difficulty transitioning to middle and late game due to limited training time. I will continue to develop this algorithm.

Sense Yo Soles, Aimee M. Davis, Anthony S. Childers, Alexander Bravo

Computer Engineering

The Sense Yo Soles project is a system that is embedded into a shoe insert; the plantar pressure distribution is measured by calculating the ratio of pressure on 6 individual pressure sensors located on the lateral, medial, and heel areas of both the left and right foot to the total pressure distributed across both feet. The alpha prototype created by our client and her Biomedical Engineering senior project team at San Jose State University, measured and analyzed data using the above method while connected to power and a computer. In CPE 350, we made the system stand alone and wireless …

Responsiveness Of Mining Community Acceptance Model To Key Parameter Changes, Mark Kofi Boateng, Kwame Awuah-Offei

Mining Engineering Faculty Research & Creative Works

The mining industry has difficulties predicting changes in the level of community acceptance of its projects over time. These changes are due to changes in the society and individual perceptions around these mines as a result of the mines' environmental and social impacts. Agent-based modeling can be used to facilitate better understanding of how community acceptance changes with changing mine environmental impacts. This work investigates the sensitivity of an agent-based model (ABM) for predicting changes in community acceptance of a mining project due to information diffusion to key input parameters. Specifically, this study investigates the responsiveness of the ABM to …

Autonomous Seed Sower With On-The-Go Soil Sensor, Vaibhav Thacker

Manipal Journal of Science and Technology

The aim of the paper is to study the effects of introducing automation in the seed sowing mechanisms already in place and equip them with on-the-go soil sensors to obtain real time data of soil conditions prior to actual sowing and its feasibility. This bot can also be controlled wirelessly.

Computational Drug Designing In Health Care, Rajanikant G K

Manipal Journal of Science and Technology

Drug designing is an important step of defending health care. This is the central stage in the treatment of various diseases and ailments. In this paper, the process of drug designing has been discussed in detail. The meaning of drug designing and its traditional and rational methodologies has been briefly described. Further, the process of computer-aided drug design has been explained extensively. The different methods such as structure and ligand-based drug design and extraction of respective pharmacophores have been described. In addition, virtual screening methods such as docking, drug-likeness prediction and molecular dynamics (MD) simulation are discussed. Finally, the real-life …

Impact Of Macropores And Gravel Outcrops On Phosphorus Leaching At The Plot Scale In Silt Loam Soils, Derek M. Heeren, Garey A. Fox, Chad Penn, Todd Halihan, Daniel E. Storm, Brian Haggard

Department of Agricultural and Biological Systems Engineering: Faculty Publications

In response to increased nutrient loads in surface waters, scientists and engineers need to identify critical nutrient source areas and transport mechanisms within a catchment to protect beneficial uses of aquatic systems in a cost-effective manner. It was hypothesized that hydrologic heterogeneities (e.g., macropores and gravel outcrops) in the vadose zone play an integral role in affecting flow and solute transport between the soil surface and shallow alluvial aquifers. The objective of this research was to characterize phosphorus (P) leaching through silt loam soils to alluvial gravel aquifers in the floodplains of the Ozark ecoregion at the plot scale. Solute …

Solar Roller - Solar Powered Usb Charging Station, Aaron Bartfeld, Tanner Mjelde, Kaylan Naicker

Electrical Engineering

As the necessity for renewable energy increases, solar power becomes more and more prevalent. At the same time, as technology increases, the necessity for charging one’s electronic devices also increases. The Solar Roller merges solar energy with the ability to charge one's electronic device in one compact cart. The Solar Roller is a solar-powered USB charging station that allows people of all backgrounds to develop a better understanding of alternative fuels, while charging their USB device. It has a touch screen display that provides voltage levels of the battery as well as a TV that displays solar powered information. The …