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Articles 67321 - 67350 of 196957

Full-Text Articles in Engineering

Construction Management Computer Lab Redesign, Matt Williamson Jun 2019

Construction Management Computer Lab Redesign, Matt Williamson

Construction Management

This project looked to take an inventory of the current Construction Management computer lab, communicate with students and other stakeholders about how the computer lab is used, look ahead to how the lab will be used in the future, and create a new design that best suits the Construction Management department.

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Framing Exterior Partitions For The Great Northern Services Housing Project, Patrick Pierre Shami Jun 2019

Framing Exterior Partitions For The Great Northern Services Housing Project, Patrick Pierre Shami

Construction Management

In the wake of a fire in Weed, CA that destroyed 150 homes, Great Northern Services (GNS), a nonprofit organization, reached out to Cal-Poly San Luis Obispo about a service-learning opportunity. This opportunity involved designing a single-family home and prefabricating the exterior partitions in San Luis Obispo. In Fall 2017, interdisciplinary teams of students delivered design proposals in the Integrated Project Delivery studio. The selected design was then finalized into a permitted set of drawings, and planning for the prefabrication began. The extent of the prefabrication was limited to the framing and sheathing of the exterior walls. The length of …

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Implementing An “Intro To Sst” Topics Course, Connor M. Cody Jun 2019

Implementing An “Intro To Sst” Topics Course, Connor M. Cody

Construction Management

This study is designed to gauge Cal Poly Construction Management students interest level in a potential new topics course, “Intro to SST”, that will feature small building projects and emphasize construction safety. With this course, students will be more experienced and safe with building in the SST prior to the Residential and Commercial building labs, as well as receiving a brief knowledge of what goes into the trade jobs on a day to day basis. Students were asked to answer ten questions – nine survey and one free response. These questions were designed to provide quantitative and qualitative data that …

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Ghana Clean Water Initiative – Risk Management, Mason Nolan Jun 2019

Ghana Clean Water Initiative – Risk Management, Mason Nolan

Construction Management

In August of 2019 several Cal Poly Students will be traveling to a remote fishing village located off of Lake Volta in Ghana. This project is being completed by Cal Poly's MCAA chapter alongside the NECA chapter. These students will be constructing a community center, a water filtration system, and ice making and refrigeration facilities. The project will rely heavily on solar power as there is no grid in the village the project is taking place in. This project inherently has many risks associated with it and needs a risk management plan to combat these risks. The three ways these …

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Optimizing Internships In Construction Management Based On Student's Interests And Experience, Austin Meneses Logan Jun 2019

Optimizing Internships In Construction Management Based On Student's Interests And Experience, Austin Meneses Logan

Construction Management

The growing norm for students in the field of Construction Management is to have at least one internship under their belt prior to entering the industry for a full-time career. The goal of this research paper is to analyze student feedback from their previous internships to draw conclusions on how companies should structure their internship programs based on student interests and level of experience. Research was done evaluating current Construction Management students with previous internship experience at California Polytechnic State University San Luis Obispo. This research paper will be beneficial for industry companies to better tailor their internship programs to …

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Viability Of Solar Power On Jobsites, Braden J. Levalley Jun 2019

Viability Of Solar Power On Jobsites, Braden J. Levalley

Construction Management

The use of solar energy has slowly been on the rise over the past few decades, the full potential of solar energy has not been realized in the realm of construction. Solar power in construction has been slow to catch on, as many of the upfront costs associated with solar power has created a feeling that investing in such systems will ultimately not be worth the investment. This paper attempts to address the issues of upfront costs, the willingness for contractors to invest in renewable energy both now and in the future, and will also identify possible uses for solar …

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Inception Through Inspection: Quality Control In The Simspon Strong Tie Materials Demonstration Lab, Allyson G. Forster Jun 2019

Inception Through Inspection: Quality Control In The Simspon Strong Tie Materials Demonstration Lab, Allyson G. Forster

Construction Management

The purpose of this senior project is to create a quality control program in the Simpson Strong Tie (SST) Materials Demonstration Lab using BIM 360. The goal of this program is to help streamline the building process of the six-foot by eight-foot tiny home in Residential Construction Management. The SST laboratory activities have been developed in the true spirit of “learn by doing” and serve as a way for Construction Management (CM) students to interact with the building process directly. Students in the CM department are taught that quality begins at the inception of a job and should be monitored …

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Thermal Characterization Of Graphene/Polyethylene Nanocomposites, Ahmed Z. A. Abuibaid Jun 2019

Thermal Characterization Of Graphene/Polyethylene Nanocomposites, Ahmed Z. A. Abuibaid

Chemical and Petroleum Engineering Theses

Practically, almost all polymers are solidified from the melts for product-forming purposes. Therefore, the evolution of solid structure (crystallization behavior) from their molten form has prime importance in manufacturing high performance materials. Polyethylene (PE) is one of the most commonly used semi crystalline polymers all over the world. In this thesis, nanocomposites of PE with thermal reduced graphene (TRG) (PE/TRG) were prepared via solvent blending and the crystallization of PE has been investigated using a differential scanning calorimeter (DSC). The nanocomposites were crystallized from the melts under both isothermal and dynamic conditions, and evolution of crystal formation is studied using …

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Impact Of Bioinspired Robots On Veterans Pursuing Stem Degrees, Otilia Popescu, Vukica M. Jovanovic, Krishnanand Kaipa, Karina Arcaute, Anthony W. Dean Jun 2019

Impact Of Bioinspired Robots On Veterans Pursuing Stem Degrees, Otilia Popescu, Vukica M. Jovanovic, Krishnanand Kaipa, Karina Arcaute, Anthony W. Dean

Engineering Technology Faculty Publications

The gap in the area of advanced manufacturing skilled workforce and the efforts in guiding veterans towards STEM careers are merged in the NSF funded project presented in this paper. While most of the products and STEM educational programs focused on a maker concept that are currently available are specifically designed for young population, at various K-12 grade levels, to increase their interest in STEM and engineering careers in particular, there is a limited availability of such programs to address adult population. The study presented in this paper focuses on developing and implementing a series of workshops for veterans, using …

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Single Image Reflection Removal Beyond Linearity, Qiang Wen, Yinjie Tan, Jing Qin, Wenxi Liu, Guoqiang Han, Shengfeng He Jun 2019

Single Image Reflection Removal Beyond Linearity, Qiang Wen, Yinjie Tan, Jing Qin, Wenxi Liu, Guoqiang Han, Shengfeng He

Research Collection School Of Computing and Information Systems

Due to the lack of paired data, the training of image reflection removal relies heavily on synthesizing reflection images. However, existing methods model reflection as a linear combination model, which cannot fully simulate the real-world scenarios. In this paper, we inject non-linearity into reflection removal from two aspects. First, instead of synthesizing reflection with a fixed combination factor or kernel, we propose to synthesize reflection images by predicting a non-linear alpha blending mask. This enables a free combination of different blurry kernels, leading to a controllable and diverse reflection synthesis. Second, we design a cascaded network for reflection removal with …

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R2gan: Cross-Modal Recipe Retrieval With Generative Adversarial Network, Bin Zhu, Chong-Wah Ngo, Jingjing Chen, Yanbin Hao Jun 2019

R2gan: Cross-Modal Recipe Retrieval With Generative Adversarial Network, Bin Zhu, Chong-Wah Ngo, Jingjing Chen, Yanbin Hao

Research Collection School Of Computing and Information Systems

Representing procedure text such as recipe for crossmodal retrieval is inherently a difficult problem, not mentioning to generate image from recipe for visualization. This paper studies a new version of GAN, named Recipe Retrieval Generative Adversarial Network (R2GAN), to explore the feasibility of generating image from procedure text for retrieval problem. The motivation of using GAN is twofold: learning compatible cross-modal features in an adversarial way, and explanation of search results by showing the images generated from recipes. The novelty of R2GAN comes from architecture design, specifically a GAN with one generator and dual discriminators is used, which makes the …

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Matching Passengers And Drivers With Multiple Objectives In Ride Sharing Markets, Guodong Lyu, Chung Piaw Teo, Wangchi Cheung, Hai Wang Jun 2019

Matching Passengers And Drivers With Multiple Objectives In Ride Sharing Markets, Guodong Lyu, Chung Piaw Teo, Wangchi Cheung, Hai Wang

Research Collection School Of Computing and Information Systems

In many cities in the world, ride sharing companies, such as Uber, Didi, Grab and Lyft, have been able to leverage on Internet-based platforms to conduct online decision making to connect passengers and drivers. These online platforms facilitate the integration of passengers and drivers’ mobility data on smart phones in real-time, which enables a convenient matching between demand and supply in real time. These clear operational advantages have motivated many similar shared service business models in the public transportation arena, and have been a disruptive force to the traditional taxi industry.

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Metagraph-Based Learning On Heterogeneous Graphs, Yuan Fang, Wenqing Lin, Vincent W. Zheng, Min Wu, Jiaqi Shi, Kevin Chang, Xiao-Li Li Jun 2019

Metagraph-Based Learning On Heterogeneous Graphs, Yuan Fang, Wenqing Lin, Vincent W. Zheng, Min Wu, Jiaqi Shi, Kevin Chang, Xiao-Li Li

Research Collection School Of Computing and Information Systems

Data in the form of graphs are prevalent, ranging from biological and social networks to citation graphs and the Web. Inparticular, most real-world graphs are heterogeneous, containing objects of multiple types, which present new opportunities for manyproblems on graphs. Consider a typical proximity search problem on graphs, which boils down to measuring the proximity between twogiven nodes. Most earlier studies on homogeneous or bipartite graphs only measure a generic form of proximity, without accounting fordifferent “semantic classes”—for instance, on a social network two users can be close for different reasons, such as being classmates orfamily members, which represent two distinct …

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Bioprinting Of 3d Perfusable Structures Using An Extrusion-Based System, Prabhuti Kharel Jun 2019

Bioprinting Of 3d Perfusable Structures Using An Extrusion-Based System, Prabhuti Kharel

Theses and Dissertations

Bioprinting is a technique of creating 3D cell laden structures by accurately dispensing biomaterial to form complex synthetic tissue. Bioprinting is a process of additive manufacturing where the cell functionality and viability is preserved within the printed structure. Bioprinting is a promising alternative to produce physiologically relevant 3D structures that mimic the native tissue. However, fabrication of complex structures with vascularization has been a major challenge in bioprinting. To overcome this challenge sacrificial printing in combination with fugitive inks has been explored to create vascularize structures. The objective of this study is to fabricate hollow channels within the bioprinted structure …

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Next-Generation Rainfall Idf Curves For The Virginian Drainage Area Of Chesapeake Bay, Xixi Wang, Xiaomin Yang, Zhaoyi Cai Jun 2019

Next-Generation Rainfall Idf Curves For The Virginian Drainage Area Of Chesapeake Bay, Xixi Wang, Xiaomin Yang, Zhaoyi Cai

Civil & Environmental Engineering Faculty Publications

Probability-based intensity-duration-frequency IDF curves are needed but currently lacking for Department of Defense DoD to construct and manage its infrastructure in changing climate. The objectives of this project were to 1 develop an innovative approach for considering rainfall non-stationarity in developing such IDF curves and 2 apply this approach to the state of Virginia. In this regard, the observed data on 15-min rainfall at 57 gauges and the precipitations projected by twelve pairs of Regional Climate Model RCM and Global Circulation Model GCM were used. For a given gauge or watershed, in terms of fitting the empirical exceedance probabilities, a …

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Maximizing Poly(3-Butylthiophene-2,5-Diyl) Electrical Conductivity By Maximizing Transcrystal Growth, Edward Alexander Bicknell Jun 2019

Maximizing Poly(3-Butylthiophene-2,5-Diyl) Electrical Conductivity By Maximizing Transcrystal Growth, Edward Alexander Bicknell

Materials Engineering

Polymers are generally considered electrical insulators. Despite this, research in the mid 1970’s found that polymers consisting of a conjugated backbone structure could become electrically conductive upon doping.1 The conjugated polymer analyzed for this project was poly(3-butylthiophene-2,5-diyl) (P3BT). Transcrystals have been found as a way to promote electrical conductivity through mechanisms including π bond atomic orbital overlap and electron mobility.2 In theory, maximizing transcrystal length would also maximize P3BT electrical conductivity, increasing its applicable use in electronic devices. The goal of this project was to determine a methodological way to maximize P3BT electrical conductivity by producing the longest transcrystal length …

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Photooxidation Of Biopolymers, Marlon H. Dieguez Jun 2019

Photooxidation Of Biopolymers, Marlon H. Dieguez

Materials Engineering

The lack of degradation of plastic products have imposed problems in the preservation of natural environments and their ecosystems through plastic accumulation. This collection of plastics promotes toxin exposure to wildlife, finding its way into the food chain, affecting both land and marine ecosystems. The project goal is to understand the degradation mechanisms of biodegradable materials and other comparable materials through UV radiation testing. Polylactide (PLA) films and polycarbonate (PC) films will be compared for their relative deterioration from constant UV radiation in a Q-U-V accelerated weather tester for 28 days. Five 3” by 5” samples of 14 mil thick …

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Effect Of Overaging On Tensile Properties Of 2219-T852 Aluminum, Austin Bitter, Tristan Koyamatsu Jun 2019

Effect Of Overaging On Tensile Properties Of 2219-T852 Aluminum, Austin Bitter, Tristan Koyamatsu

Materials Engineering

This project investigated the overaging performance of aluminum alloy 2219-T852 for use in high temperature applications. 2219 aluminum is an alloy containing 5.8 to 6.8 percent copper, and is classified as a high strength age hardenable alloy. The sponsor for this project, Weber Metals, hopes to use 2219 Al to replace titanium in certain applications above the thermal limits of typical high strength Al. To test its performance, they manufactured round tensile samples and delivered them in peak aged, T852 condition. These samples were then overaged at a range of times and temperatures. The times in this experiment were one …

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Optimizing Electrospun Ceramic Nanofiber Strength Through Two-Step Sintering, Michael Ross Jun 2019

Optimizing Electrospun Ceramic Nanofiber Strength Through Two-Step Sintering, Michael Ross

Materials Engineering

Two-step sintering (TSS) consists of a high-temperature step and immediate cooling to a sintering temperature for an extended sintering time, where grain growth is suppressed by severe densification during the high-temperature step. TSS is adopted to enhance mechanical properties of electrospun ceramic nanofibers (CNFs), a class of porous ceramics used for environmental remediation, optoelectronics, and filtration. PVP and Ga(NO3)3 nanofiber mesh, provided by Lawrence Livermore National Laboratory, was shaped, oxidized, and two-step sintered to form a nanocrystalline β-Ga2O3 CNF tube using a high-temperature step of 1,000oC. Sintering temperatures and times varied from …

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Amplifying The Collective Intelligence Of Teams With Swarm Ai, David Askay, Lynn E. Metcalf, Louis B. Rosenberg, Gregg Willcox, David Baltaxe Jun 2019

Amplifying The Collective Intelligence Of Teams With Swarm Ai, David Askay, Lynn E. Metcalf, Louis B. Rosenberg, Gregg Willcox, David Baltaxe

Industrial Technology and Packaging

Group decision-making is strengthened by the varied knowledge and perspectives that each member brings, yet teams often fail to capitalize on their diversity. This paper describes how Swarm AI, a novel collaborative intelligence technology modeled on the decision-making process of honey bee swarms, enables networked human groups to more effectively leverage their combined insights. Through an empirical study conducted on 60 small teams, each of 3 to 6 members, we demonstrate the capacity of Swarm AI to significantly amplify the collective intelligence of human groups. A well-known testing instrument—the Reading the Mind in the Eyes (RME) test —was used to …

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Redesign Of Cubesat For Beam Charging, Kuba Preis Jun 2019

Redesign Of Cubesat For Beam Charging, Kuba Preis

Industrial and Manufacturing Engineering

This paper is intended to be a study in the applications of the design freedom granted by additive manufacture in the design of a 1U CubeSat frame. The main loads experienced by a CubeSat are structural (during launch) and thermal (solar radiation). Beam charging is an emerging technology which involves charging a CubeSat using a laser beam. In this paper, a CubeSat frame was redesigned to account for the structural loads induced during launch and the thermal loads induced when beam charging. The thermal, weight, design, and structural requirements for a new CubeSat design were derived. The 1U CubeSat frame …

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Fire And Life Safety Analysis: Building 171a – Poly Canyon Village, Delaney Seeburger Jun 2019

Fire And Life Safety Analysis: Building 171a – Poly Canyon Village, Delaney Seeburger

Fire Protection Engineering: Culminating Experience Project Reports

A fire and life safety analysis was performed in fulfillment of one of the requirements for the Master of Science Degree in Fire Protection Engineering from California Polytechnic State University San Luis Obispo (Cal Poly). The analysis consisted of a prescriptive and a performance-based analysis. These analyses were performed on Building 171A which is part of the Cal Poly San Luis Obispo campus. The prescriptive analysis consisted of four distinct areas of focus: 1) Structural Fire Protection, 2) Water-Based Suppression Systems, 3) Fire Alarm and Detection Systems, 4) Egress Analysis and Design Prescriptive analyses are performed to determine whether a …

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Redefining The Engineer: An Examination On Engineering Culture And The Impact On Underrepresented Students At Cal Poly, Danica Liang Jun 2019

Redefining The Engineer: An Examination On Engineering Culture And The Impact On Underrepresented Students At Cal Poly, Danica Liang

Liberal Arts and Engineering Studies

This project is centered around examining what engineering culture is like at Cal Poly and how it may produce contrasting experiences and perceptions for underrepresented engineering students, and more specifically, for women and people of color. By gathering data through a survey and listening to personal narratives from student interviews, I hope to combine data and storytelling elements to create a compelling data journalism and visualization project.

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Commercial Vehicle Research Buggy For Active Driver Assistance Systems, Fernando Mondragon-Cardenas, Nathaniel Mccutcheon Furbeyre, Ricardo Steven Lickiss Tan Iv Jun 2019

Commercial Vehicle Research Buggy For Active Driver Assistance Systems, Fernando Mondragon-Cardenas, Nathaniel Mccutcheon Furbeyre, Ricardo Steven Lickiss Tan Iv

Mechanical Engineering

This is the Final Design Report for Daimtronics, a senior project team sponsored by Professor Charles Birdsong of Cal Poly and by Daimler Trucks North America. This team integrated mechatronic systems into a scale semi-truck chassis using existing mechanical and software systems from three separate Cal Poly senior projects over the recent years: Daimscale, MicroLaren, and ProgreSSIV. The goal was to have a user-friendly platform capable of executing autonomous driving algorithms that are programmable at a high level in Simulink and Robotic Operating System (ROS). Advanced driver assistance and autonomous vehicle algorithms were not within the scope of this project, …

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Gravity Drip Irrigation System, Ryan C. Waldron, Cole R. Presson, Josh L. Plaskett Jun 2019

Gravity Drip Irrigation System, Ryan C. Waldron, Cole R. Presson, Josh L. Plaskett

Mechanical Engineering

A gravity-fed, drip irrigation system prototype has been developed for use in raised garden beds and other small-scale crop irrigation applications. The original developer of the prototype and sponsor of the project, Tina Creel, is seeking to refine it into a functional consumer product through the implementation of technical engineering and standard manufacturing processes. The scope of the project includes the tank support system and supply of water to the sponsors current piping subsystem. It does not include any modifications to the bed, piping system or water tank itself. The target specifications of the system include its load capacity, dimensions, …

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Human Powered Vehicle Trainer, Nicholas Hung Nguyen, Gregory Reece Bridges, Jacinta Garcia, Mitchell Sidney Smith Jun 2019

Human Powered Vehicle Trainer, Nicholas Hung Nguyen, Gregory Reece Bridges, Jacinta Garcia, Mitchell Sidney Smith

Mechanical Engineering

This Final Design Review (FDR) document describes the final design and completed prototype of a Mechanical Engineering senior project team at California Polytechnic State University, San Luis Obispo. The project goal is to create an adjustable human powered vehicle training bike for George Leone that allows a rider to gain confidence with the unique reclined bike geometry ahead of the World Human Powered Speed Challenge at Battle Mountain, Nevada. This document outlines the customer’s needs and technical research performed which together determine the project’s scope and engineering specifications. Next, we present the initial idea generation process and its results, along …

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Adaptive Paddle Board, Alexander Holthaus, Alexander Holthaus, Garrett Holmes, Garett Jones Jun 2019

Adaptive Paddle Board, Alexander Holthaus, Alexander Holthaus, Garrett Holmes, Garett Jones

Mechanical Engineering

This Final Design Review (FDR) document outlines the Adaptive Paddle Board senior project, done by four Mechanical Engineering Students at California Polytechnic State University and provides detail on the project and what the team has accomplished. The goal was to create a universally adaptive paddle board that can be used by the Central California Adaptive Sports Center for a wide range of persons with disabilities. This document highlights current research from patents and existing products, details regarding customer specifications, results from concept generation, the manufacturing and testing that went into the final design, and the process taken to get there. …

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Uav Catapult, Sean Drew Huxley, Benjamin Richard Lacasse, David Matthew Garcia, Jordan Joseph Cearns Jun 2019

Uav Catapult, Sean Drew Huxley, Benjamin Richard Lacasse, David Matthew Garcia, Jordan Joseph Cearns

Mechanical Engineering

This document outlines the Senior Design Project proposed by Dr. Aaron Drake that was assigned to a team of Mechanical Engineering students at California Polytechnic State University, San Luis Obispo. The purpose of this project was to design, build, test, and finalize a launching system for two small, fixed wing, unmanned aerial vehicles (UAVs) owned by Dr. Drake and Cal Poly. The goal was to create a system that was both portable and reliable to use, only requiring a two-person team to use effectively in the field. The most important design requirements were determined to be the launch speed, assembly …

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Retaining Ring Material Wear Analysis And Testing, Thomas Headland, Barten Hansen, Austin Fisher, Kevin Hurtado Jun 2019

Retaining Ring Material Wear Analysis And Testing, Thomas Headland, Barten Hansen, Austin Fisher, Kevin Hurtado

Mechanical Engineering

The chemical mechanical planarization (CMP) of wafers for integrated circuits is an essential – yet expensive – step in their manufacture. CMP machine down-time due to the replacement of process consumables, such as wafer retaining rings, is a significant contributor to the process cost. To reduce the operational cost of their CMP machines, Revasum is interested in exploring new designs and materials for wafer retaining rings to increase their operational lifetime. Background research showed that there is currently no suitable method for testing new retaining ring designs and materials for wear characteristics specific to the CMP process. Available wear testing …

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Burner Design For A Pressurized Oxy-Coal Reactor, William Cody Carpenter Jun 2019

Burner Design For A Pressurized Oxy-Coal Reactor, William Cody Carpenter

Theses and Dissertations

The need for electric power across the globe is ever increasing, as is the need to produce electricity in a sustainable method that does not emit CO2 into the atmosphere. A proposed technology for efficiently capturing CO2 while producing electricity is pressurized oxy-combustion (POC). The objective of this work is to design, build, and demonstrate a burner for a 20 atmosphere oxy-coal combustor. Additionally, working engineering drawings for the main pressure vessel and floor plan drawings for the main pressure vessel, exhaust, and fuel feed systems were produced. The POC reactor enables the development of three key POC technologies: a …

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