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Articles 41041 - 41070 of 196021

Full-Text Articles in Engineering

Soil Drought Can Mitigate Deadly Heat Stress Thanks To A Reduction Of Air Humidity, Jeremy Pal, Hendrik Wouters, Jessica Keune, Irina Y. Petrova, Chiel C. Van Heerwaarden, Adriaan J. Teuling, Jordi Vilà-Guerau De Arellano, Diego G. Miralles Jan 2022

Soil Drought Can Mitigate Deadly Heat Stress Thanks To A Reduction Of Air Humidity, Jeremy Pal, Hendrik Wouters, Jessica Keune, Irina Y. Petrova, Chiel C. Van Heerwaarden, Adriaan J. Teuling, Jordi Vilà-Guerau De Arellano, Diego G. Miralles

Civil and Environmental Engineering Faculty Works

Global warming increases the number and severity of deadly heatwaves. Recent heatwaves often coincided with soil droughts that intensify air temperature but lower air humidity. Since lowering air humidity may reduce human heat stress, the net impact of soil desiccation on the morbidity and mortality of heatwaves remains unclear. Combining weather balloon and satellite observations, atmospheric modelling, and meta-analyses of heatwave mortality, we find that soil droughts-despite their warming effect-lead to a mild reduction in heatwave lethality. More specifically, morning dry soils attenuate afternoon heat stress anomaly by ∼5%. This occurs because of reduced surface evaporation and increased entrainment of …

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An Efficient Electro-Thermal Compact Mode Of Sic Power Mosfets Including Third Quadrant Behavior, Arman Ur Rashid, Md Maksudul Hossain, Yuheng Wu, Hayden Seth Carlton, H. Alan Mantooth, Britt Brooks Jan 2022

An Efficient Electro-Thermal Compact Mode Of Sic Power Mosfets Including Third Quadrant Behavior, Arman Ur Rashid, Md Maksudul Hossain, Yuheng Wu, Hayden Seth Carlton, H. Alan Mantooth, Britt Brooks

Electrical Engineering Faculty Publications and Presentations

This paper presents an efficient physics-based electro-thermal model that solves some advanced problems of modeling Silicon Carbide (SiC) power MOSFETs. It is the first electro-thermal model that simulates the temperature dependency of the first and the third quadrant characteristics, including the reverse recovery of the body diode accurately and efficiently. It extends from a previous work that demonstrated the isothermal physics-based model of the gate-dependent body diode. Physics-based temperature scaling of the first and third quadrant allows simulation of the self-heating effect in a wide range of temperatures (27 °C–200 °C), even for the synchronous operation. Moreover, a physics-based modeling …

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Power Relay Based Multiple Device Cryogenic Characterization Method And Results, Yuqi Wei, Maksudul Hossain, Dereje Woldegiorgis, Xia Du, H. Alan Mantooth Jan 2022

Power Relay Based Multiple Device Cryogenic Characterization Method And Results, Yuqi Wei, Maksudul Hossain, Dereje Woldegiorgis, Xia Du, H. Alan Mantooth

Electrical Engineering Faculty Publications and Presentations

Cryogenic power electronics is a promising technology due to their high efficiency and high power density characteristics. As the key element of power electronic systems, semiconductor performance should be evaluated under cryogenic temperatures. Liquid nitrogen or liquid helium are usually adopted to achieve cryogenic temperatures. Traditionally, only one semiconductor can be evaluated at one time under different temperatures, which is time-consuming and not energy-friendly. To enable multiple-device characterization at one time under different temperatures, a novel power relay based characterization circuit and corresponding control strategy are described. With the aid of the proposed circuit, multiple devices can be characterized by …

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Chemical Clean Automated Loader, Jordyn Bryner Jan 2022

Chemical Clean Automated Loader, Jordyn Bryner

Williams Honors College, Honors Research Projects

TTM Technologies (TTM) is a global printed circuit board (PCB) manufacturer. The work described in this report was completed in the TTM North Jackson, Ohio location. This plant focuses primarily on the manufacturing of rigid and rigid-flex PCBs for the aerospace and defense industry. TTM North Jackson has an ongoing labor dependency issue due to the shortage of workers the nation is facing. To solve this problem, TTM has focused the efforts of their new engineers and interns on automating processes that are labor dependent. The goal is to provide design guidance to be used later by TTM to automate …

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Repurposing Human Α-Defensin 6, An Antimicrobial Peptide, As A Beta Amyloid Inhibitor, Eleanor Plaster Jan 2022

Repurposing Human Α-Defensin 6, An Antimicrobial Peptide, As A Beta Amyloid Inhibitor, Eleanor Plaster

Williams Honors College, Honors Research Projects

Amyloid aggregation and microbial infection have been identified as the two main pathological risk factors that can result in amyloid diseases such as Alzheimer’s disease (AD), type II diabetes, and Parkinson’s disease. These two risk factors have been well studied separately, however only targeting one of these risk factors has shown to not be successful in preclinical trials since amyloid diseases are multifactorial. In this study, a new approach has been proposed to determine the effects of an antimicrobial and anti-amyloid aggregation approach by looking at the inhibition abilities of a heterocomplex of human α-defensin 6 (HD-6), whose secondary structure …

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Sustainability And Environmentally Friendly Methods To Travel Over Waterways, Kendall Kubus Jan 2022

Sustainability And Environmentally Friendly Methods To Travel Over Waterways, Kendall Kubus

Williams Honors College, Honors Research Projects

Throughout daily traveling, the main structures used are bridges and tunnels. Bridges are used as overpasses over valleys, canyons, and areas that require a large amount of dirt fill to bring the roadway up to the proper grade. Tunnels are underpasses through mountains, under city limits and waterways. The benefits of building a bridge structure is little preparation goes into earth-work and the transportation of aggregate materials. There is some time spent testing surrounding soil to determine the process that will need to occur for foundation preparations in bridge columns. Options for foundation include different types of drilled shafts, caissons, …

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Uv-Incorporated Sanitation Lining For Disinfection Of Carpentry Tools In Grade Schools, Nicole Dembiczak, Alex Paxitzis, Quinn Piorkowski, Ivana Shah Jan 2022

Uv-Incorporated Sanitation Lining For Disinfection Of Carpentry Tools In Grade Schools, Nicole Dembiczak, Alex Paxitzis, Quinn Piorkowski, Ivana Shah

Williams Honors College, Honors Research Projects

This project will focus on the issues caused by a pandemic, particularly, sanitation issues and difficulties in a public area. After a considerable amount of research, it became evident that current sanitation methods are time inefficient, not always effective and wasteful. There are numerous misconceptions on how these methods work and skepticism of the products themselves. The pandemic caused by COVID-19 is an extremely relevant issue that has affected schools, hospitals and other high traffic areas. This project will focus on K-12 grade schools that struggle with quick, easy and effective cleaning methods in between and after class. We aim …

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Npt Test Machine, Lauren Cash Jan 2022

Npt Test Machine, Lauren Cash

Williams Honors College, Honors Research Projects

Located at the Research facility at The Goodyear Tire & Rubber Company, the Non-Pneumatic Tire (NPT) Program is currently in the prototype phase. However, airless tire structures are quickly gaining popularity as an alternative to a traditional pneumatic tire. The NPT Test Machine is a measurement fixture that will perform a series of evaluations to determine the stiffness of an NPT; this will allow the program to expand and evolve more rapidly into a manufacturing phase. In this Senior Design Project, a complete test solution was researched, designed, built, programmed, and validated so that data can be collected, and tires …

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Smart Uv-C Disinfectant Module, Nicole Baldy, Luke Rogers, Haitham Saleh Jan 2022

Smart Uv-C Disinfectant Module, Nicole Baldy, Luke Rogers, Haitham Saleh

Williams Honors College, Honors Research Projects

The Smart UV Disinfectant device shall sanitize objects which are 18”x14”x8” or smaller and less than 20 lbs. using UV-C light. This device should contain many safety measures to prevent human and animal exposure to the UV-C light and have no public touchpoints to operate the interface. In order to achieve the first objective, this device shall contain a "sanitizing chamber" which completely encloses the object to be sanitized to prevent outside exposure with detection of any lifeforms inside of the chamber; for the second objective, it will contain a wireless interface to an Android application which can be used …

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"Demeter" Soil Monitoring System, Ryan Matthews, Rachel Rummer, Temilolu Fayomi, Alex Fuller Jan 2022

"Demeter" Soil Monitoring System, Ryan Matthews, Rachel Rummer, Temilolu Fayomi, Alex Fuller

Williams Honors College, Honors Research Projects

The purpose of this project is to develop a soil monitoring system that can remotely sense and relay soil conditions back to a user. The deMETER soil probe, Demeter is the Greek goddess of the harvest, is designed to aid hobbyist gardeners, small-scale farms, and nurseries to monitor their dynamic soil conditions and maximize their harvest. The probe is a self-powered system that can monitor the moisture and essential nutrients of the soil profile to determine which areas should receive water and fertilizer. This would significantly cut water and fertilizer waste. The solution will include an embedded system with sensors …

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Schaeffler E-Motor, Jenne Harasin, Zachary Zatta, Christopher Tvaroch Jan 2022

Schaeffler E-Motor, Jenne Harasin, Zachary Zatta, Christopher Tvaroch

Williams Honors College, Honors Research Projects

This project will be focusing on the work accomplished at Schaeffler to convert an existing internal combustion engine, Ford F-250 truck, into a battery electric vehicle. This report focuses on the vehicle's integration with an emphasis on the bearing design, e-Axle housing's method for mounting, bus bar design, resolver design, differential options, wiring for low and high voltage, and oil pump and cooling system for e-Beam. The bearings for the differential as well as the power transmission system from the electric motor to the e-Axle will need to be specified. By late summer 2022, Schaeffler will have a working prototype …

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A Comparison Of Common Structural Materials, Molly Green Jan 2022

A Comparison Of Common Structural Materials, Molly Green

Williams Honors College, Honors Research Projects

This report will compare structural steel, concrete, and lumber through the lenses of mechanical properties, design process, cost, and environmental impact. Steel is a versatile, strong, and lightweight material that comes at a premium price – both financially and environmentally. It is the most expensive material of the three included in this report. This is largely due to its complex manufacturing process that is also responsible for a significant amount of the world’s carbon dioxide emissions. Concrete is significantly less expensive than steel, but the carbon dioxide emissions from manufacturing are approximately equal. Concrete also only performs well in compression …

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Performing A Penetration Test On A Storage Network, Scott Moskal Jan 2022

Performing A Penetration Test On A Storage Network, Scott Moskal

Williams Honors College, Honors Research Projects

A small storage network will be designed with two wired routers, one wireless router, a switch, two laptops, a desktop, and a Raspberry Pi. Both laptops will be connected to the wireless router. The HP laptop will run Parrot OS and the Acer laptop will run Windows 11. The wireless router will be connected to the second router via port eth0. The eth2 port on the second router will be connected to eth1 port of the third router. The third router will be connected to the eth0 port of the Netgear switch. The switch will have two VLANs. VLAN 10 …

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Grinding And Super-Finishing Test Machine Project, Michael Simon Jan 2022

Grinding And Super-Finishing Test Machine Project, Michael Simon

Williams Honors College, Honors Research Projects

A research project in The University of Akron to study grinding and super-finishing of silicon nitride ceramic was initiated by Dr. Siamak Farhad and sponsored by the Timken Company, with the assistance of undergraduate students Michael Simon, Ryan Hosso and Mathew Rozmajzl. The study required analysis of forces and scratches generated during grinding processes of silicon nitride samples. A testing assembly was designed and constructed to record the forces generated during grinding and super-finishing of silicon nitride samples in a computer-numerical-control machine. Silicon nitride samples were subjected to desired grinding and super-finishing operations and all forces generated during the process …

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Design Project: 3d Printer/Injection Molder Hybrid, Lee Paolucci, Luke Everhart, Brandon Leap, Karson Lorey Jan 2022

Design Project: 3d Printer/Injection Molder Hybrid, Lee Paolucci, Luke Everhart, Brandon Leap, Karson Lorey

Williams Honors College, Honors Research Projects

In the realm of rapid, small-scale prototyping, there are a few main factors that drive decisions to invest resources in technology to make that prototyping possible. Cost and ease of use are two of the most influential when looking at most SMEs (Small to Medium-sized Enterprises). The U.S. Small Business Administration defines an SME as smaller than 1,250 employees. According to An Assessment of Implementation of Entry-Level 3D Printers from the Perspective of Small Businesses, 59% of small manufacturers had implemented 3D printers as of 2014. However, no matter what technology is used in rapid prototyping, there are common …

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Study Guide Generation In Chemical Engineering Thermodynamics: A Comparison Between Individual And Group Preparation, William Brown Jan 2022

Study Guide Generation In Chemical Engineering Thermodynamics: A Comparison Between Individual And Group Preparation, William Brown

Williams Honors College, Honors Research Projects

Thermodynamics is an essential course in the chemical engineering curriculum. Thermodynamics requires the use of many equations and rules that use subtle concepts from math, physics, and chemistry. To assist students with using these equations and recalling rules on exams, students are often permitted a “study guide” to use on the exams to help avoid rote memorization. Study guide construction is an environment in which students learn, and learning has been shown to improve when collaboration is involved. In this research, students will construct study guides individually for one exam, and in teams for one exam. Students will answer questions …

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Digital Image Correlation System Design, Verification And Analysis, Tyler Kraft, Matthew J. Riczo, Andrew Chong Jan 2022

Digital Image Correlation System Design, Verification And Analysis, Tyler Kraft, Matthew J. Riczo, Andrew Chong

Williams Honors College, Honors Research Projects

Two dimensional digital image correlation provides an accurate and effective way to capture strain data on test sections with unusual or oblique geometries. The system requires a camera to record video footage, alignment fixtures and software to convert the footage into strain values. The system works by capturing the video footage of a specific portion of the specimen and comparing the movement of selected pixels. This is all done in the software GOM Correlate and Tracker. This test document outlines the setup, procedure, and validation steps to fulfill this goal. The setup involves a camera, tripod, blue lighting, and laser …

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Cochlear Implant Training Model, Devin Baughn, Sidney Mingle, Aaron Bowman Jan 2022

Cochlear Implant Training Model, Devin Baughn, Sidney Mingle, Aaron Bowman

Williams Honors College, Honors Research Projects

Currently available training methods for cochlear implant surgeries such as cadavers and imaging systems are expensive and available for a limited number of training sessions. With the goal of decreasing risk factors associated with cochlear implant surgery, our team developed a cochlear implant training model prototype that is designed to provide a trial-and-error, tactile training method for developing force perception levels required to avoid causing damage to the cochlea. This model is designed to utilize a disposable material that ruptures when exposed to critical force levels. A material testing device was developed and utilized to test an assortment of easily …

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Autonomous Payload Design With Systems Engineering, Michael Downs, Christopher James Liebhart 2nd Jan 2022

Autonomous Payload Design With Systems Engineering, Michael Downs, Christopher James Liebhart 2nd

Williams Honors College, Honors Research Projects

The design will be an autonomous payload consisting of auto deployment of a drone running an autonomous mission of mapping the terrain around a grounded rocket. The project is part of the Akronauts payload project for the 2022 Spaceport competition. It will include the development of a ground station for monitoring and controlling the drone and the transfer of live data to the station and a computer on board the rocket. The project will aim to use system engineering techniques to accomplish this in the hope of providing documentation and thus insight into the best way to develop a multi-disciplinary …

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Design Of Composite Joints Using Machine Learning Approaches, Natalie Richards Jan 2022

Design Of Composite Joints Using Machine Learning Approaches, Natalie Richards

Williams Honors College, Honors Research Projects

Adhesively bonded joints have an advantage in joining dissimilar engineering materials due to their high structural efficiency and being lightweight. These joints are either between two opposite laminates or between a composite laminate and a metal structure. The aerospace and automotive industries have seen an increase in utilizing these adhesive joints in their engineering applications. Joint strength along with the failure mode (adhesive, delamination, etc.) is the most important parameter to evaluate when understanding the capability of the adhesive joint. In this paper, a regression and a classification machine learning (ML) model are utilized to predict the failure load and …

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Schlieren Imaging Of A Supersonic Wind Tunnel, Caleb Townsend, Tayler S. Powell Jan 2022

Schlieren Imaging Of A Supersonic Wind Tunnel, Caleb Townsend, Tayler S. Powell

Williams Honors College, Honors Research Projects

This project exemplifies Schlieren Imaging on a Supersonic Wind Tunnel. Schlieren Imaging allows one to visualize fluid flow by refracting light through a fluid. The Schlieren Imaging system denoted in this paper is used to visualize the shock waves of air onto a test section within a supersonic wind tunnel. This is done by directing a beam of light through a test section and then focusing the light onto a blade edge. This blade edge then breaks up the light beam so that the refractions, created by the pressure differences, are blocked by the knife edge which allows the pressure …

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Golf Club Cleaner, Owen Roach, Chris Wertenberger, Michael Skerlong Jan 2022

Golf Club Cleaner, Owen Roach, Chris Wertenberger, Michael Skerlong

Williams Honors College, Honors Research Projects

Cleaning golf clubs can be a tedious process, however a necessary one to maintain equipment. Clubs are normally cleaned by filling a bucket with soap and water, soaking all the clubs to be cleaned, then scrubbing each one individually. An automatic club cleaner would make this process much easier and more enjoyable. Using electric motors, the club cleaner would have spinning brushes in soap and water to quickly and easily clean the club head. The machine would have different sections for cleaning the club head, polishing the club face, and cleaning the grip. The cleaner should be inexpensive and easy …

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Multi-Platform Suppressor Design Project, Wyatt A. Openshaw, Alex B. Chiples Jan 2022

Multi-Platform Suppressor Design Project, Wyatt A. Openshaw, Alex B. Chiples

Williams Honors College, Honors Research Projects

The Multi-Platform suppressor is a design that is meant to bridge the gap in the suppressor market by being compatible and configurable with both rifle and pistol platform firearms. In the specific design and prototype referenced in this report, the Multi-Platform suppressor was designed to be used with 9mm pistol and 5.56x45mm rifle calibers with safety, effectiveness, and practicality in mind. To achieve this, the suppressor is configurable, utilizing a Nielsen device in the pistol configuration and a solid mount adapter that replaces the Nielson device piston and spring while in the rifle configuration. This allows the suppressor to retain …

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Nject-3d, Kody Rinkevich, Logan Henderson, Nathaniel Anderson, James Patton, Cameron Wilson Jan 2022

Nject-3d, Kody Rinkevich, Logan Henderson, Nathaniel Anderson, James Patton, Cameron Wilson

Williams Honors College, Honors Research Projects

NJECT-3D is a student initiated design project where the utilities of a 3D printer and an injection molding machine are integrated into one cohesive unit. The goal of our project was to test the limits of rapid prototyping by utilizing printed molds. We developed an automated system where a mold can be printed on a 3D printer, translated from said 3D printer to an injection molder, then compressed and injected at said injection molder to output a finalized injection molded part.

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The Design Of The Payload System Of An Aircraft, Ryan Cooper Jan 2022

The Design Of The Payload System Of An Aircraft, Ryan Cooper

Williams Honors College, Honors Research Projects

The project group will design and build a system to unload packages for the Zips Aero Design Team's aircraft for the 2021-22 competition year.

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Smart Bike Aftermarket System (Sbams), Noah Lamadanie, Jack Bullock, Dawson Beachy, John Albrecht Jan 2022

Smart Bike Aftermarket System (Sbams), Noah Lamadanie, Jack Bullock, Dawson Beachy, John Albrecht

Williams Honors College, Honors Research Projects

The Smart Bike Aftermarket System will be a set of connected modules, which, when installed on a standard bicycle, will allow it to mimic some of the safety and quality-of-life functionalities of an E-bike. The most notable of these safety features is an ability to detect vehicles approaching from behind and alert the user of potential collisions. The system will also implement lighting (Headlights, taillights, and turn signals), and a coupled application so a user can view more advanced information about their cycling. The primary advantage of this system over a standard E-bike is that it will have a lower …

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Cardbot, Jakob Reiter, Grant Crump, Drake Drivere, Adam Miner Jan 2022

Cardbot, Jakob Reiter, Grant Crump, Drake Drivere, Adam Miner

Williams Honors College, Honors Research Projects

Many people enjoy playing cards but playing cards in the times of COVID-19 is difficult. There are many designs for dealing and shuffling robots, but few include sanitization and autonomous operation. This design is for a BlackJack card dealing and shuffling robot that will be autonomous and will sanitize the playing cards using UV-C LEDs. This will assist in keeping the user safe while playing a game of BlackJack

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Dirigible Anemometer Mount, Matthew Stanko Jan 2022

Dirigible Anemometer Mount, Matthew Stanko

Williams Honors College, Honors Research Projects

Airships, like any other aircraft, require sensor inputs in order to fly. One type of sensor is the anemometer. This project outlines the development of a mounting system which would attach 2 ultrasonic anemometers to the bottom of an aircraft. The study follows the entire engineering process from requirement derivation through conceptual designs, testing, analysis, and verification. The details of this report are confidential and therefore cannot be disclosed.

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Aerodynamics Wind Tunnel Lab, James Soroczak, Brett Preslar Jan 2022

Aerodynamics Wind Tunnel Lab, James Soroczak, Brett Preslar

Williams Honors College, Honors Research Projects

The goal of this project is to create a lab for an aerodynamics class with the purpose of exploring the effects of various physical features and aerodynamic conditions on a wing. The main area of study will be the effects on lift, drag, and moment. To best display these effects, an airfoil/wing to wind tunnel interface with variable physical characteristics will be designed. The various physical alterations will be implemented to show the effect each one has on lift, drag, and moment. These alterations will include different aspect ratios, removable winglets, and various lengths. The airspeed and angle of attack …

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Analysis Of Road Use Maintenance Agreements (Rumas), Anna Cermak Jan 2022

Analysis Of Road Use Maintenance Agreements (Rumas), Anna Cermak

Williams Honors College, Honors Research Projects

A Road Use Maintenance Agreement, also known as a RUMA, is an agreement made between a government entity and a business to put in place the set of rules that will guide the responsibilities of the business regarding the use of the entity's roads (Road use maintenance agreements RUMA, 2020). This specific type of road maintenance agreement is popularly used in the state of Ohio a the time. Most other states still operate on older ways of thinking, not capitalizing on the industry that in their area, therefore causing their road infrastructure and economies to suffer. A template agreement was …

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