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Articles 60841 - 60870 of 197987

Full-Text Articles in Engineering

Hydronic Service Valve Product Development, Mark Hunsaker Mar 2020

Hydronic Service Valve Product Development, Mark Hunsaker

Construction Management

Since the inception of modern mechanical and HVAC systems, maintenance and repairs have been prevalent in both contracting and facility operations. The average life of HVAC equipment is fractional compared to the life of buildings as construction technologies improve. Traditionally, the serviceability of heating and cooling equipment has entailed the significant amounts of labor and materials to disruptively drain or freeze hydronic systems in order to cut in means of bypassing the main system, swapping out equipment, or repair. The intent of this project is to explore alternative methods to forgo the aforementioned negative impacts of service and to improve …

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Cal Poly Associated General Contractors Service- Learning Project In San Ignacio, Belize, Will A. Myers Mar 2020

Cal Poly Associated General Contractors Service- Learning Project In San Ignacio, Belize, Will A. Myers

Construction Management

In the winter of 2020, the Cal Poly Associated general Contractors chapter of San Luis Obispo built over 200 linear feet of soccer seating for the community of Selena, just outside of San Ignacio, Belize. Our team fundraised over $18,000 and designed a soccer stadium that would leave a lasting impact on the community. Throughout all phases of the project, we were challenged with many obstacles that tested our ability to overcome and handle difficult situations.

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A Case Study On The Financial Implications Of The Zero Net Energy (Zne) Goal In California, Shane A. Willingham Mar 2020

A Case Study On The Financial Implications Of The Zero Net Energy (Zne) Goal In California, Shane A. Willingham

Construction Management

This paper is a case study that identifies potential financial implications from the updated Title 24, Part 6 code requirements established in 2019 by the California Energy Commission (CEC). The CEC works closely with the California Public Utilities Commission (CPUC), who’s long term goal is to make all residential structures Zero Net Energy (ZNE) throughout the state. The CEC’s updated code requirements include mandatory measures for detached residential homes to meet Zero Net Electricity on an Energy Design Rating (EDR) basis, a step towards Zero Net Energy. The purpose of this study is to understand the additional construction costs associated …

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Belize Service Learning: A Case Study In Construction Technology Abroad, Parker H. Doshier Mar 2020

Belize Service Learning: A Case Study In Construction Technology Abroad, Parker H. Doshier

Construction Management

In Winter of 2019, members of the Associated General Contractors, Student Chapter at Cal Poly traveled to Selena, Belize to complete soccer bleachers at the local soccer field. This trip offered an excellent case study into feasibility and benefits of new construction technology on all project sizes and in different countries. SketchUp was used in multiple phases of this project including design, estimating and the creation of as-builts. Procore offers an array of useful features including the scheduling, daily logs and meetings that were used on this project. The scheduling feature was useful in tracking travel deadlines and for monitoring …

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Increasing Health And Safety Through The Utilization Of 4d Modeling, Rogan J. Wells Mar 2020

Increasing Health And Safety Through The Utilization Of 4d Modeling, Rogan J. Wells

Construction Management

Health and safety is one of the most important aspects of the construction industry. Every year there are thousands of work-related injuries in the construction industry. Avoiding these injuries is of the utmost importance on a jobsite. This paper will analyze how building information modeling, specifically the use of 4D building information modeling, can be utilized to increase the overall health and safety of construction jobsite. An exploratory survey was conducted amongst architecture, engineering, and construction industry professionals who hold a wide range of experience. The aim of this survey was to analyze their knowledge and experiences using building information …

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Neca Ghana Project, Michael T. Klee Mar 2020

Neca Ghana Project, Michael T. Klee

Construction Management

Cal Poly’s motto is, “Learn by Doing" and for Cal Poly’s NECA Chapter, this isn’t simply a motto, but a directive for proactive change. For my senior project I will be leading the Cal Poly NECA chapter in the design, pre- fabrication and construction of a 5-7kw solar array, community center, ice production room and technology room in the remote fishing village of Agbokpa, Ghana. The solar array will power multiple industrial DC freezers, high efficiency LED lighting and charging stations while additionally powering water filtration and irrigation systems. Like many other fishing villages around the world, Agbokpa has no …

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Analyzing More Sustainable Alternatives Than Using Ordinary Portland Cement In Commerical Construction, Brandon A. Sturla Bs Mar 2020

Analyzing More Sustainable Alternatives Than Using Ordinary Portland Cement In Commerical Construction, Brandon A. Sturla Bs

Construction Management

The purpose of this paper is to look at more sustainable alternative options for concrete use for California Commercial Contractors. This paper will analyze the more sustainable options for concrete and come to conclusions on how effective the alternative options are for protecting the environment, encouraging sustainability, maintaining cost effectiveness, and maintaining efficiency in building. This paper provides data on the negative impact concrete use has had on the environment and potential ways to alleviate this. This paper will also analyze how cost-effective the alternative options are to see if the alternative options are realistic and affordable to use in …

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Prefabrication And The Labor Shortage On The Central Coast, Brenden Ryan Napier Mar 2020

Prefabrication And The Labor Shortage On The Central Coast, Brenden Ryan Napier

Construction Management

The labor shortage has affected every aspect of construction all over California, however the central coast has been hit especially hard. The central coast’s location between the two major developmental hubs presents challenges such as relocating employees and finding skilled craftsman. One potential method that has been shown to increase productivity and cut costs is to prefabricate. Prefabrication can improve working conditions and increase worker safety while streamlining schedule and reducing environmental impact. While these benefits are certainly possible in larger cities that have the manufacturing grunt, this paper aims to understand if prefabrication is a viable way to alleviate …

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Housecalls Mobile: Virtual Stethoscope/Otoscope, Julia Kelley, Cullen Mcgee, Eduardo Uribe-Saldana Mar 2020

Housecalls Mobile: Virtual Stethoscope/Otoscope, Julia Kelley, Cullen Mcgee, Eduardo Uribe-Saldana

Biomedical Engineering

At the start of the project, our initial deliverables were to add a low cost camera into virtual otoscope and to add a pediatric attachment to the stethoscope. However, about half way through the first quarter (1.5 months into the project), our deliverables changed to the following: to design a housing unit for the selected otoscope camera and to increase battery life to allow for 12+ battery life. To accomplish our deliverables, we divided up the responsibilities as follows: One person headed the mechanical design, one person headed the electrical design, and one person served as a liaison between the …

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Esophageal Temperature Mapping And Monitoring Sheath, Nicole M. Rogers, Hillary Johnson, Alexander Silva Mar 2020

Esophageal Temperature Mapping And Monitoring Sheath, Nicole M. Rogers, Hillary Johnson, Alexander Silva

Biomedical Engineering

The purpose of this document is to provide a product development summary for an accessory device that joins an esophageal temperature probe and a mapping catheter together to be used during cardiac ablation. Catheter ablation therapy is performed in the left atrium, utilizing extremely hot or cold temperatures to create scar tissue and treat atrial fibrillation and other arrhythmias. The close positioning of the left atria adjacent to the esophagus presents a large risk as the extreme temperatures used during ablation can lead to esophageal damage or fistulas. This device is designed to integrate correlate data from the temperature probe …

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Prosthetic Thumb, Allison M. Sigdestad, Sahil Sharma, Cale Foreman Mar 2020

Prosthetic Thumb, Allison M. Sigdestad, Sahil Sharma, Cale Foreman

Biomedical Engineering

The Prosthetic Thumb Project is a senior design project completed by Biomedical Engineering Undergraduate students at California Polytechnic State University. This senior design project is aimed at designing a prosthetic thumb for a Cal Poly Pomona student who lost their thumb in an accident last year. The patient has ultimately lost between 30-40% of functionality of his left hand, and so we would like to give him that mobility back. Originally, the patient was worried about having a prosthesis, and wanted something more stagnant that would resemble the look of the thumb he lost. However, after working with him, we …

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Ikioo Flying Robot, Nicholas Michael Lapidus, Bosung Josh Kim, Jenny Fong Mar 2020

Ikioo Flying Robot, Nicholas Michael Lapidus, Bosung Josh Kim, Jenny Fong

Biomedical Engineering

No abstract provided.

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Gesea Biosciences - Core Shell Pellet Manufacturing Device, Claire Edelman, Maria Medrano, Rachel Longoria Mar 2020

Gesea Biosciences - Core Shell Pellet Manufacturing Device, Claire Edelman, Maria Medrano, Rachel Longoria

Biomedical Engineering

No abstract provided.

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Pulsed Electrical Field Ablation Modulation, Camille Lousie Dozois, Jason Tyler Arias, Courtnee Lin Madsen Mar 2020

Pulsed Electrical Field Ablation Modulation, Camille Lousie Dozois, Jason Tyler Arias, Courtnee Lin Madsen

Biomedical Engineering

This document comprises the steps taken by the senior project team to create a Proof-of-Concept Review for a Variable Pulsed Electric Field Ablation Catheter. First, the team did a significant amount of background research on related literature to better understand the current status of the project topic. After sufficient background information was obtained, project objectives and deliverables were finalized. Once customer requirements and the indications for use were completed, engineering specifications for the product and project were documented. All key customer requirements and engineering specs were related to the variable pulse functionality, maneuverability, as well as overall dimensioning of the …

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Feature Agglomeration Networks For Single Stage Face Detection, Jialiang Zhang, Xiongwei Wu, Steven C. H. Hoi, Jianke Zhu Mar 2020

Feature Agglomeration Networks For Single Stage Face Detection, Jialiang Zhang, Xiongwei Wu, Steven C. H. Hoi, Jianke Zhu

Research Collection School Of Computing and Information Systems

Recent years have witnessed promising results of exploring deep convolutional neural network for face detection. Despite making remarkable progress, face detection in the wild remains challenging especially when detecting faces at vastly different scales and characteristics. In this paper, we propose a novel simple yet effective framework of “Feature Agglomeration Networks” (FANet) to build a new single-stage face detector, which not only achieves state-of-the-art performance but also runs efficiently. As inspired by Feature Pyramid Networks (FPN) (Lin et al., 2017), the key idea of our framework is to exploit inherent multi-scale features of a single convolutional neural network by aggregating …

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Flying After Diving: Decompressions And Barotraumas., Nihad E. Daidzic Feb 2020

Flying After Diving: Decompressions And Barotraumas., Nihad E. Daidzic

Aviation Department Publications

FAA Safety Seminar (GL1598968) held at Modern Avionics/Air Trek North at KFCM, Eden Prairie, MN at 9:00 CST on Saturday, February 29, 2020.

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What's The Buzz?, Christine L. Moskalik Feb 2020

What's The Buzz?, Christine L. Moskalik

Professional Learning Day

A fun, interdisciplinary, hands-on activity with circuits, engineering, and bees Teachers will learn how to implement an activity with their students to explore circuit basics, energy transfer, and pollination through a hands-on toothbrush-bot activity that is coupled with a fun storyline involving honey bee communication and behavior.

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Waterlogged: How Usu Engineering Students Keep Library Books Dry, Usu College Of Engineering Feb 2020

Waterlogged: How Usu Engineering Students Keep Library Books Dry, Usu College Of Engineering

College of Engineering News

Feb. 28, 2020 — Utah State University’s Merril-Cazier Library has recently had problems with leaks from its foundation and from pipes throughout the building. The potential for water damage poses a serious challenge to the university’s Special Collections and Archives, which are housed in the basement beneath overhead pipes.

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Structures And Electrochemical Properties Of Sn-Cl Co-Doped Li2Mno3 As Positive Materials For Lithium Ion Batteries, Fei Wang, Huan-Huan Zhai, Du-Dan Wang, Yu-Peng Li, Kang-Hua Chen Feb 2020

Structures And Electrochemical Properties Of Sn-Cl Co-Doped Li2Mno3 As Positive Materials For Lithium Ion Batteries, Fei Wang, Huan-Huan Zhai, Du-Dan Wang, Yu-Peng Li, Kang-Hua Chen

Journal of Electrochemistry

Positive material Li2MnO3 shows the highest ratio of lithium to manganese among lithium-rich materials and exhibites the theoretical capacity up to 458 mAh·g-1, making it one of the most promising cathode materials. However, this material has the intrinsic low electrical conductivity and poor cycle stability. In this paper, Li2MnO3, the lithium-rich positive material, was prepared by sol-gel method using acetate as raw material and citric acid as a complexing agent. By using SnC2O4 as a tin source, Sn4+ instead of Mn4+ was introduced to obtain the …

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Recent Progress In The Mechanistic Understanding Of Co2 Reduction On Copper, Matthew M Sartin, Wei Chen, Fan He, Yan-Xia Chen Feb 2020

Recent Progress In The Mechanistic Understanding Of Co2 Reduction On Copper, Matthew M Sartin, Wei Chen, Fan He, Yan-Xia Chen

Journal of Electrochemistry

In this review, we present the major developments in the understanding of the mechanisms of the electrochemical reduction of CO2 from a historical perspective. Most of the work discussed in this review was carried out at copper electrodes, as this is the only material at which hydrocarbons are produced in reasonable quantities. The emphasis focuses on the differentiation of mechanisms for the generation of C1 and C2 products as well as factors and methods for controlling the product selectivity of CO2 reduction. We have highlighted ambiguities, assumptions, and important methodologies, such as differential electrochemical mass spectrometry and electrochemical …

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An Analysis Of The Influence Of Hand Hole And Ventilation Hole Design On Compressive Strength Of Corrugated Fiberboard Boxes By An Artificial Neural Network Model, Tita Archaviboonyobul, Ravipim Chaveesuk, Jay Singh, Tunyarut Jinkarn Feb 2020

An Analysis Of The Influence Of Hand Hole And Ventilation Hole Design On Compressive Strength Of Corrugated Fiberboard Boxes By An Artificial Neural Network Model, Tita Archaviboonyobul, Ravipim Chaveesuk, Jay Singh, Tunyarut Jinkarn

Industrial Technology and Packaging

This research aimed at developing a high-performing corrugated fiberboard box compression strength prediction model and to analyze the influences of ventilation and hand hole designs for these containers on the box compression test (BCT) by applying artificial neural network (ANN) modeling. The input variables considered in this study are composed of nine parameters including box dimension as well as shapes, sizes, positions, and locations of ventilations and hand holes of a regular slotted container (RSC, FEFCO 0201). Back propagation algorithms (BPNs) of ANN models were developed from 970 BCT testing data points (single wall boards, C flute, 205/112/205 g/m2). Tested …

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Lithium Storage Performance Of High Capacity Material Si@CPzs In Lithium Ion Batteries, Qing-Nuan Zhang, Fang-Fang Zhang, Hong-Xia Li, Bing-Jun Yang, Xiao-Cheng Li, Juan Yang Feb 2020

Lithium Storage Performance Of High Capacity Material Si@CPzs In Lithium Ion Batteries, Qing-Nuan Zhang, Fang-Fang Zhang, Hong-Xia Li, Bing-Jun Yang, Xiao-Cheng Li, Juan Yang

Journal of Electrochemistry

Carbon layers with different thicknesses were introduced into the surfaces of silicon (Si) nanoparticles by sol-gel method using poly (cyclotriphosphazene-co-4, 4'-sulfonyldiphenol) as the carbon source. Technologies of X-ray diffraction, thermo-gravimetric analysis, Brunauer-Emmett-Teller and transmission electron microscopy were employed to analyze the structures and components of the as-prepared Si@CPZS composites. Electrochemical performance of Si@CPZS with different carbon thicknesses was studied. The results showed that Si@CPZS with carbon thickness of 10 nm possessed the best performance. Its capacity remained 940 mAh·g-1 after 290 cycles under 500 mA·g-1. As the addictive, the graphite-based anode contained 30% of …

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In-Situ Raman Spectroscopic Study Of Electrochemical Reactions At Single Crystal Surfaces, Min Su, Jin-Chao Dong, Jian-Feng Li Feb 2020

In-Situ Raman Spectroscopic Study Of Electrochemical Reactions At Single Crystal Surfaces, Min Su, Jin-Chao Dong, Jian-Feng Li

Journal of Electrochemistry

Since the 1970s, in-situ spectroscopy (Raman, infrared, etc.) has been used to systematically study the electrochemical interfacial reactions which can provide more information about surface reactions and reveal the mechanisms from microscopic view due to its excellent surface sensitivity and energy resolution. With the development of nano-technology, surface-enhanced Raman scattering effect spectroscopy has made rapid progress. Recently, the emergence of SHINERS provides a good in-situ spectroscopic technique for the study of catalytic reactions on single crystal model electrodes with deterministic surface structure. In this paper, we have summarized the application of SHINERS in the study of …

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Neuro-Fuzzy Modeling For Predictive Control Systems With Complex Technological Processes And Production, Yusupbekov Nodirbek, Shukhrat Gulyamov, Malika Doshchanova Feb 2020

Neuro-Fuzzy Modeling For Predictive Control Systems With Complex Technological Processes And Production, Yusupbekov Nodirbek, Shukhrat Gulyamov, Malika Doshchanova

Chemical Technology, Control and Management

The paper implements a modification of a fuzzy neural network, which is suitable for predictive control purposes. Adaptation of a multidimensional programmable controller based on a neural algorithm for the back propagation of forecasting errors is proposed, as well as neural parametric identification of a fuzzy mathematical model of complex technological processes and production based on experimental data and expert estimates.

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Preparations Of Nickel-Iron Hydroxide/Sulfide And Their Electrocatalytic Performances For Overall Water Splitting, Hang-Shuo Lu, Xiao-Bo He, Feng-Xiang Yin, Guo-Ru Li Feb 2020

Preparations Of Nickel-Iron Hydroxide/Sulfide And Their Electrocatalytic Performances For Overall Water Splitting, Hang-Shuo Lu, Xiao-Bo He, Feng-Xiang Yin, Guo-Ru Li

Journal of Electrochemistry

The Ni-Fe/Ti oxygen evolution electrode was prepared by electrodeposition on a titanium mesh substrate. Then, the as prepared Ni-Fe/Ti electrode was used to derive the Ni-Fe-S/Ti hydrogen evolution electrode through solid phase sulfuration. The effects of the molar ratio of Ni2+ to Fe3+ in the electrolyte and the amount of thiourea on the structures and electrochemical performances of Ni-Fe/Ti and Ni-Fe-S/Ti electrodes were investigated. The results show that the oxygen evolution performance of Ni-Fe/Ti electrode was first increased and then decreased with the increase of nickel ion content in the electrolyte. The Ni9Fe1/Ti electrode exhibited the best oxygen …

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Advances In High-Resolution Radiation Detection Using 4h-Sic Epitaxial Layer Devices, Krishna C. Mandal, Joshua W. Kleppinger, Sandeep K. Chaudhuri Feb 2020

Advances In High-Resolution Radiation Detection Using 4h-Sic Epitaxial Layer Devices, Krishna C. Mandal, Joshua W. Kleppinger, Sandeep K. Chaudhuri

Faculty Publications

Advances towards achieving the goal of miniature 4H-SiC based radiation detectors for harsh environment application have been studied extensively and reviewed in this article. The miniaturized devices were developed at the University of South Carolina (UofSC) on 8 × 8 mm 4H-SiC epitaxial layer wafers with an active area of ≈11 mm2. The thicknesses of the actual epitaxial layers were either 20 or 50 µm. The article reviews the investigation of defect levels in 4H-SiC epilayers and radiation detection properties of Schottky barrier devices (SBDs) fabricated in our laboratories at UofSC. Our studies led to the development of …

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Precise Measuring Cells For Quantitative And Qualitative Measurement, A.A. Begunov, B.M. Akhmedov, R.A. Ibragimov Feb 2020

Precise Measuring Cells For Quantitative And Qualitative Measurement, A.A. Begunov, B.M. Akhmedov, R.A. Ibragimov

Chemical Technology, Control and Management

The main provisions considered in assessing the accuracy of methods and measurement results are considered. It is shown that in the experimental assessment of various accuracy indicators, and also when analyzing the content of components in various gaseous media, the sorption-gravimetric measurement method is widely used, methods for measuring the mass of the sorbent and possible sources of error of this technique. Methods of measuring the mass of gas using specific surface areas, including taking into account the contact of gas with a solid material, and also, the amount of adsorbed gas and its pressure, temperature, type and size of …

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Features Of Hydration Process, Structure Formation And Curing Processes Of Mono And Polymineral Cement In The Presence Of Additives Of Solid Waste Of Soda Production, Nargis Shamadinova, Gulnora Abdukadirovna Tokhtakhunova Phd, Temur Azimovich Atakuziev, Shakhnoza Saidanvarovna Rakhimjanova Feb 2020

Features Of Hydration Process, Structure Formation And Curing Processes Of Mono And Polymineral Cement In The Presence Of Additives Of Solid Waste Of Soda Production, Nargis Shamadinova, Gulnora Abdukadirovna Tokhtakhunova Phd, Temur Azimovich Atakuziev, Shakhnoza Saidanvarovna Rakhimjanova

Chemical Technology, Control and Management

The influence of the additive of solid waste of soda production (SWSP) on the content of -C2S and C3S in cement studied. It was found that SWSP affects the density of the aluminum-containing minerals C3A and C4AF, in addition, in the presence of gypsum, their plasticizing properties improved. The introduction of SWSP additives during grinding of clinker intensifies the grinding process and made it possible to obtain a more plastic cement. It was proved that SWSP with CaCl2 content can be used as an additive to concrete and cement mortars - …

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Controlling And Forecasting The Reliability Of Integrated Circuits Of Radio Systems Transmitting Information, Abdulaziz M. Nazarov Prof, Dilmurod A. Davronbekov Prof. Feb 2020

Controlling And Forecasting The Reliability Of Integrated Circuits Of Radio Systems Transmitting Information, Abdulaziz M. Nazarov Prof, Dilmurod A. Davronbekov Prof.

Chemical Technology, Control and Management

The issues of forecasting the reliability of integrated circuits, which are the main element base of modern radio engineering information transmission systems, are considered. Methods of parametric and functional control are described to determine the correspondence of the static and dynamic parameters of microcircuits to the required values. A combined method for determining the operating parameters of microcircuits is also described. The advantage of this method in addition to the two above methods is indicated that it combines the function of controlling the operation of the entire control system. Two approaches for predicting reliability are given, as well as mathematical …

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Investigating The Solution Properties Of Population Model Of Cross-Diffusion Model With Double Nonlinearity And With Variable Density, Dildora Kabilovna Muhamediyeva Feb 2020

Investigating The Solution Properties Of Population Model Of Cross-Diffusion Model With Double Nonlinearity And With Variable Density, Dildora Kabilovna Muhamediyeva

Chemical Technology, Control and Management

The models of two competing populations with double nonlinear diffusion and three types of functional dependencies are considered. The first dependence corresponds to the Malthusian type, the second to the Verhühlst type (logistic population), and the third to Olli-type populations. A common element of this kind of description is the presence of a linear source. Nonlinear sinks are also present in descriptions of populations of the Verhulst and Ollie type. Suitable initial approximations for a rapidly converging iterative process are proposed. Based on a self-similar analysis and comparison of the solutions of the Cauchy problem in the domain for an …

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