Engineering Commons^™

Inkjet Printing Of Nano-Silver Conductive Ink On Pet Substrate, Skyler Jiang

Materials Engineering

Printing of conductive ink traditionally uses copper-based ink and was used on high temperature metal substrates due to the high curing and sintering temperature of copper. In this experiment, however, Metalon JS-B25P nano-silver conductive ink was printed using an Epson Stylus C88+ inkjet printer on polyethylene terephthalate (PET) based Novele printing media made for low temperature applications. With silver’s lower sintering temperature, the nano-silver particles in this ink are desired to be able to sinter at a low enough temperature to be used on the PET substrate. The printed ink traces were cured with a temperature-controlled hotplate at 100℃, 120℃, …

Screen Printing Silver Stretchable Conductive Paste To High Density Synthetic Fabric, Allison Rose Tuuri, Wesley Graham Powell

Materials Engineering

This project investigated the viability of screen printing stretchable silver conductive paste directly onto fabric and how the resistance changed under cyclic mechanical loading. The paste tested was DuPont™ PE873 stretchable silver conductive paste, which forms a stretchable conductive path by suspending silver flakes in elastomer that can be elastically strained along with the underlying substrate. The silver pastes were printed directly onto two different high-density synthetic fabrics of different weaves. Other samples were prepared by first printing a base layer between the silver paste and the fabric. One base layer was a solvent-based dielectric (DuPont™ ME776) and a stretchable …

How To Gauge The Accuracy Of Fuzzy Control Recommendations: A Simple Idea, Patricia Melin, Oscar Castillo, Andrzej Pownuk, Olga Kosheleva, Vladik Kreinovich

Departmental Technical Reports (CS)

Fuzzy control is based on approximate expert information, so its recommendations are also approximate. However, the traditional fuzzy control algorithms do not tell us how accurate are these recommendations. In contrast, for the probabilistic uncertainty, there is a natural measure of accuracy: namely, the standard deviation. In this paper, we show how to extend this idea from the probabilistic to fuzzy uncertainty and thus, to come up with a reasonable way to gauge the accuracy of fuzzy control recommendations.

Blend It Applications And Server, Rebecca Mckinley, Cory Mayer, Tyler Fox, Alex Bartlett, Aly Chapman

Computer Engineering

No abstract provided.

The Relationship Between Structural Parameters And Mechanical Properties Of Cactus Spines, Jorge Armando Martinez, Pamela Liz Szeto, Theresa Mae Stewart

Materials Engineering

Considering an increasing interest in renewable, biodegradable resources that exhibit excellent mechanical properties, 24 species of cactus spines were investigated using three-point bend testing, X-ray diffraction (XRD) for structural parameters, and scanning electron microscopy (SEM) to analyze fracture surfaces. Additionally, a density of about 1.3 g/cm3 was measured for each spine utilizing the displacement method, closely matching existing data from literature. The flexural modulus varied greatly between species, ranging from 1.22 GPa (Echinocactus polycephalus) to 43.58 GPa (Stenocereus thurberi). In addition, flexural strength and strain to failure was also measured for each spine. XRD analysis of …

Selective Depolymerization Of Industrial Hemp And Its Effects On Thermal Resistivity, Tanner J. Jolly

Materials Engineering

There is a growing shift within the construction materials industry towards green and sustainable building products. Spending in this area has increased 5 fold since 2011 to a total revenue of $70 billion. An area of particular interest has been aimed at replacing fiberglass batt insulation with cellulose. Cellulose is the most abundant polymer on earth, and has potential to replace petroleum derived insulations. This project explores the potential of selectively isolating cellulose by depolymerizing the support structures found in lignocellulosic materials – specifically lignin and hemicellulose. The current focus is on isolating cellulose from Cannibas sativa, but more …

Yeager Multi-Function Tool Ql+, Osiel Flores-Hernandez, Carter Wilson, David Wright, Mitchell Jackson

Industrial and Manufacturing Engineering

No abstract provided.

Dci Data Center Building- Fire Protection Analysis, Bryan Hathaway

Fire Protection Engineering: Culminating Experience Project Reports

A fire protection analysis utilizing prescriptive and performance based design was performed for the existing building (DCIB) located in Minnesota. A new tenant is investigating converting the DCIB from a building used for data center, to an office building which will utilize an open office concept.

A prescriptive analysis of the building was performed to determine the life safety, fire suppression, fire alarm and structural requirements to ensure compliance with current applicable codes and standards. The prescriptive requirements are outlined and reviewed in Section 1 through Section 5 of this analysis. Modifications to the DCIB are required to achieve the …

Woodward Willis Building- Fire And Life Safety Evaluation, Jordan Nerat

Fire Protection Engineering: Culminating Experience Project Reports

This project report is an academic exercise, completed as part of the MS Fire Protection Engineering program at California Polytechnic State University. This project is a culminating report with regards to life safety analysis of the Woodward Willis Building located in Detroit Michigan, which utilizes the fundamental and applied courses of the fire protection engineering program.

The analysis is based on a prescriptive analysis of the building and its features, and also a performance analysis which entails the life safety aspect of the building. The analysis of the building is performed in accordance with NFPA 101 Life Safety Code 2015 …

Taft Community College- New Student Center- Fire And Life Safety Analysis, Matthew Winston

Fire Protection Engineering: Culminating Experience Project Reports

The following report is a fire and life safety investigation into a new facility. The planned facility is a new Student Center at Taft Community College. The prescriptive requirements as set forth by the most up to date codes and standards chosen for the project are met. The building has been properly classified with respect to occupancy and construction type. Appropriate design for interior partitions and exterior walls have been identified. Interior finish requirements are elaborated so that adherence to these guidelines is made clear. The fire sprinkler system has an adequate supply of water from the municipal water supply …

Polar Coordinate Farm Bot Final Project Report, John Brown, Kasenia Colombo, Lucas Salem, Ning Jeng, Rory Stothers, Sam Lees

Industrial and Manufacturing Engineering

FarmBot Inc. is a local startup that is advancing precision agriculture through automation and open source technology. The original FarmBot model, FarmBot Genesis, operates over a rectangular area of 3 x 1.5 meters. It plants, waters, weeds and grows produce autonomously using CNC technology. Our project sponsor and inventor of FarmBot, Rory Aronson, tasked our team with developing and testing a polar coordinate farmbot capable of performing on par with the Cartesian farmbot in growing a circular vegetable garden in a user’s backyard. A successful project was defined by meeting specific customer requirements and engineering specifications predetermined and discussed with …

Design Of An Automated Welding Process For Synergy Mfg., Parsa Bakhtiari

Industrial and Manufacturing Engineering

This senior project involves a partnership with a local off-road parts manufacturer called Synergy Mfg. Synergy is experiencing a rapid increase in demand that is difficult to meet with their current processes. Because of this issue, Synergy is exploring automation in order to decrease their cycle times and increase their production output. More specifically, this report concentrates on automating a manual welding process that has a lengthy cycle time which causes Synergy’s difficulties with meeting demand. Due to time constraints, this project focused on the automation of a welding process for only one part that Synergy produces. This part contains …

Predictive Analytics In Forecasting, Matthew Suarez

Industrial and Manufacturing Engineering

Predicting future demand can be of tremendous help to businesses in scheduling and allocating appropriate amounts of material and labor. The more accurate these predictions are, the more the business will save money by matching supply with demand as closely as possible. The approach for an accurate forecast, and the goal of this project, involves using data analytics techniques on past historical sales data. Working with Campus Dining, a year's worth of their daily sales data will be analyzed and ultimately used for the end result of both an accurate forecasting technique and a way to display the results in …

Design Of A Finger Lime Loading System, Joel Jameson Hitchen

Industrial and Manufacturing Engineering

Automation for post harvest processing of finger limes is required to meet demand for the new citrus fruit being introduced to United States of America food and agriculture market. As labor wages rise, and demand climbs for finger lime product a creative solution is needed to eliminate human labor and reduce the manual input needed to process finger limes. Building on an already successful processing tool, a semi-­automated loading system was designed and implemented to overcome the problem.

Motherbrain Swarm Robots, Tam Van, Mytch Johnson, Matthew Ng, Darius Holmgren

Computer Engineering

A trial in small-scale, cheap fleet autonomy with computer vision as the feedback controls system.

Skin Tone Tracking Device (Chromaband), Ziyang Bian

Computer Engineering

It’s long been said that your skin is a window into your health and with many illnesses the first signs of trouble actually show up in your skin. So if we have this natural warning system, then why isn’t anyone able to effectively use it to predict changes in our health? The problem is that currently there is no reliable way to accurately measure the change in skin tone and how these changes may or may not change with variations in health. This project’s aim is to design and develop a device that will record the changes in a user’s …

Strategic Level Proton Therapy Patient Admission Planning: A Markov Decision Process Modeling Approach, Shengfan Zhang, Ridvan Gedik, Chase Rainwater

Mechanical and Industrial Engineering Faculty Publications

A relatively new consideration in proton therapy planning is the requirement that the mix of patients treated from different categories satisfy desired mix percentages. Deviations from these percentages and their impacts on operational capabilities are of particular interest to healthcare planners. In this study, we investigate intelligent ways of admitting patients to a proton therapy facility that maximize the total expected number of treatment sessions (fractions) delivered to patients in a planning period with stochastic patient arrivals and penalize the deviation from the patient mix restrictions. We propose a Markov Decision Process (MDP) model that provides very useful insights in …

Child Development Center- Fire Protection Analysis, Tyler Ball

Fire Protection Engineering: Culminating Experience Project Reports

This report contains two separate forms of analysis, Prescriptive-Based Analysis and Performance-Base Analysis. The Prescriptive Analysis discusses an overview of the building and its features whereas the Performance-Based Analysis discusses the building meeting applicable codes and standards as discussed in NFPA 101 Life Safety Code 2012 Edition, Unified Facilities Code (UFC), International Building Code (IBC) 2012 Edition, and the SFPE Handbook of Fire Protection Engineering. The Child Development Center (CDC) was analyzed as a new construction building. There are also noted assumptions within the report where necessary information about the building could not be obtained due to information restrictions from …

Garbage Beam, Paula Back, Mariela Murillo

Civil, Environmental and Sustainable Engineering Senior Theses

Located in a hot desert climate area prone to strong winds, Egypt is made up of many homes with little to no roofing leaving civilians exposed to the harsh elements. The overarching goal of this project is to provide these homes with efficient and affordable roofing using concrete with common garbage materials as reinforcement. Through preliminary testing and tensile testing it was possible to narrow the focus down to two reinforcement materials: fish netting and plastic grocery bags. From there final beam testing and pull out testing successfully demonstrated the promise of these materials. With this, however, it is still …

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 …