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2020

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Articles 1651 - 1680 of 10642

Full-Text Articles in Engineering

Rheological And Component Characterization Of An Innovative Bio-Binder Using Guayule Resin In Partial And Entire Asphalt Replacement, Ahmed Hemida, Magdy Abdelrahman Oct 2020

Rheological And Component Characterization Of An Innovative Bio-Binder Using Guayule Resin In Partial And Entire Asphalt Replacement, Ahmed Hemida, Magdy Abdelrahman

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Asphalt cement will not last for a long time as the world encounters a diminishment in the crude oil. For sustainable, flexible pavement development, new resources can provide a contribution to replace it partially or entirely. In this study, asphalt was partially and entirely replaced by guayule resin as a bioresource by-product, extracted during the guayule natural rubber production. Crumb rubber modifier (CRM) was used as an asphalt enhancer. The Superpave grading system was followed at high, intermediate, and low temperatures to evaluate such innovative binder for rutting, fatigue, and thermal cracking, respectively, in addition to viscosity. Therefore, the original, …

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Integrated Cyberattack Detection And Resilient Control Strategies Using Lyapunov-Based Economic Model Predictive Control, Henrique Oyama, Helen Durand Oct 2020

Integrated Cyberattack Detection And Resilient Control Strategies Using Lyapunov-Based Economic Model Predictive Control, Henrique Oyama, Helen Durand

Chemical Engineering and Materials Science Faculty Research Publications

The use of an integrated system framework, characterized by numerous cyber/physical components (sensor measurements, signals to actuators) connected through wired/wireless networks, has not only increased the ability to control industrial systems, but also the vulnerabilities to cyberattacks. State measurement cyberattacks could pose threats to process control systems since feedback control may be lost if the attack policy is not thwarted. Motivated by this, we propose three detection concepts based on Lyapunov‐based economic model predictive control (LEMPC) for nonlinear systems. The first approach utilizes randomized modifications to an LEMPC formulation online to potentially detect cyberattacks. The second method detects attacks when …

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The Identification Of Heavy Metal Accumulator Ferns In Abandoned Mines In The Philippines With Applications To Mine Rehabilitation And Metal Recovery, Rene Juna R. Claveria, Teresita R. Perez, Ian A. Navarrete, Rubee Ellaine C. Perez, Brian Christian C. Lim Oct 2020

The Identification Of Heavy Metal Accumulator Ferns In Abandoned Mines In The Philippines With Applications To Mine Rehabilitation And Metal Recovery, Rene Juna R. Claveria, Teresita R. Perez, Ian A. Navarrete, Rubee Ellaine C. Perez, Brian Christian C. Lim

Environmental Science Faculty Publications

This paper focuses on the identification of some plant accumulators of heavy metals that can facilitate mine remediation and rehabilitation in the Philippines and metal recovery or phytomining. Most of these hyperaccumulators are ferns that thrive very well in different terrains and of particular interest are Pityrogramma calomelanos, Pteris vittata, and Pteris melanocaulon that are abundant in abandoned CueAu mining areas. The amounts of Cu and As in the soil and in the aboveground (AG) and belowground (BG) components of the accumulator ferns were determined and the Bioaccumulation Factor (BF) and the Translocation Factor (TF) were derived. Efforts to …

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Improving Student Preparedness For Entering The Workforce: A Hands-On Experience In Project Management For A Graduate-Level Protein Engineering Class, Nuttanit Pramounmat, Julie N. Renner Oct 2020

Improving Student Preparedness For Entering The Workforce: A Hands-On Experience In Project Management For A Graduate-Level Protein Engineering Class, Nuttanit Pramounmat, Julie N. Renner

Faculty Scholarship

A hands-on polypeptide engineering experience that focuses on project management was developed and incorporated in a graduate-level course. The goal was to have doctoral students in chemical engineering learn about project planning tools, and experience what it might be like to plan and execute a project in industry or business. The motivation behind this goal was to help students best-utilize their technical skills in the private sector, where 42% of doctoral recipients in science and engineering work.

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Water-Soluble Graphene In Agar Gel As Electrolyte For Magnesium-Air Battery, Liew Siaw Ying Oct 2020

Water-Soluble Graphene In Agar Gel As Electrolyte For Magnesium-Air Battery, Liew Siaw Ying

Student Works (2020-2029)

Presently, ever-increasing demands on energy and the global environmental issues have given the impetus to investigate the new battery systems which are inexpensive, efficient, having high performance, and also green to the environment. Among all the battery technologies, magnesium-air (Mg-air) battery is an attractive battery to be developed owing to the interesting properties of the Mg anode. Mg has high specific energy (6.46 kWh kg-1) and reactivity, apart from its high abundance, lower cost, low toxicity, and comparatively safe to handle in the atmosphere. Nevertheless, Mg-air battery is still not being widely investigated as compared to the other batteries. Electrolyte …

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Maximum Evaporating Flux Of Molecular Fluids From A Planar Liquid Surface, Eric Bird, Zhi Liang Oct 2020

Maximum Evaporating Flux Of Molecular Fluids From A Planar Liquid Surface, Eric Bird, Zhi Liang

Mechanical and Aerospace Engineering Faculty Research & Creative Works

In This Work, We Use the Kinetic Theory of Gases (KTG) to Develop a Theoretical Model to Understand the Role of Internal Motions of Molecules on the Maximum Evaporation Flux from a Planar Liquid Surface. the Kinetic Theory is Applied to Study the Evaporation of Molecular Fluids into a Vacuum and Predict the Dimensionless Maximum Evaporation Flux (JR,max, I.e., the Ratio of the Maximum Evaporation Flux to the Molar Flux Emitted from a Liquid Surface). the Key Assumptions Regarding the Velocity Distribution Function (VDF) of Polyatomic Molecules in the Highly Nonequilibrium Vapor Near the Evaporating Surface Are Validated by the …

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2020 Online Symposium On Education In Entertainment And Engineering, Fusion Studio For Entertainment And Engineering Oct 2020

2020 Online Symposium On Education In Entertainment And Engineering, Fusion Studio For Entertainment And Engineering

Symposium on Education in Entertainment and Engineering

No abstract provided.

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2019 Symposium On Education In Entertainment And Engineering, Mary K. Pillotte, Rich Dionne Oct 2020

2019 Symposium On Education In Entertainment And Engineering, Mary K. Pillotte, Rich Dionne

Symposium on Education in Entertainment and Engineering

No abstract provided.

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Sound Vortex Diffraction Via Topological Charge In Phase Gradient Metagratings, Yangyang Fu, Chen Shen, Xiaohui Zhu, Junfei Li, Youwen Liu, Steven A. Crummer Oct 2020

Sound Vortex Diffraction Via Topological Charge In Phase Gradient Metagratings, Yangyang Fu, Chen Shen, Xiaohui Zhu, Junfei Li, Youwen Liu, Steven A. Crummer

Henry M. Rowan College of Engineering Departmental Research

Wave fields with orbital angular momentum (OAM) have been widely investigated in metasurfaces. By engineering acoustic metasurfaces with phase gradient elements, phase twisting is commonly used to obtain acoustic OAM. However, it has limited ability to manipulate sound vortices, and a more powerful mechanism for sound vortex manipulation is strongly desired. Here, we propose the diffraction mechanism to manipulate sound vortices in a cylindrical waveguide with phase gradient metagratings (PGMs). A sound vortex diffraction law is theoretically revealed based on the generalized conservation principle of topological charge. This diffraction law can explain and predict the complicated diffraction phenomena of sound …

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Utilizing Hyperspectral Remote Sensing For Soil Gradation, Jordan Ewing, T. Oommen, Paramsothy Jayakumar, Russell Alger Oct 2020

Utilizing Hyperspectral Remote Sensing For Soil Gradation, Jordan Ewing, T. Oommen, Paramsothy Jayakumar, Russell Alger

Michigan Tech Publications, Part 1

Soil gradation is an important characteristic for soil mechanics. Traditionally soil gradation is performed by sieve analysis using a sample from the field. In this research, we are interested in the application of hyperspectral remote sensing to characterize soil gradation. The specific objective of this work is to explore the application of hyperspectral remote sensing to be used as an alternative to traditional soil gradation estimation. The advantage of such an approach is that it would provide the soil gradation without having to obtain a field sample. This work will examine five different soil types from the Keweenaw Research Center …

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Optimization Of Soil To Fly-Ash Mix Ratio For Enhanced Engineering Properties Of Clayey Sand For Subgrade Use, M. A. Karim, Ahmed Sami Hassan, Adam Kaplan Oct 2020

Optimization Of Soil To Fly-Ash Mix Ratio For Enhanced Engineering Properties Of Clayey Sand For Subgrade Use, M. A. Karim, Ahmed Sami Hassan, Adam Kaplan

Faculty Articles

A laboratory investigation was carried out to determine the optimum soil to fly ash mix ratio to enhance the engineering properties of clayey sand that can potentially be used as a road subgrade. Grain size distribution and Atterberg limits tests were conducted to classify the soil and to study the effects of the fly ash on the soil plasticity. The Proctor test was conducted to determine the optimum moisture content and maximum dry density of soil–fly ash mixtures with arbitrarily selected 0%, 40%, 50%, and 60% fly ash content. A higher percentage was selected to find the highest optimum fly …

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Molybdenum Deposition And Dissolution In Ethaline With The Use Of Fluoride Salts, Ethan Mitchel Gunnell Oct 2020

Molybdenum Deposition And Dissolution In Ethaline With The Use Of Fluoride Salts, Ethan Mitchel Gunnell

Theses and Dissertations

This work demonstrates the deposition of molybdenum in a deep eutectic solvent for the first time, and explores the processes needed for electrorefining of molybdenum. The electrochemical and transport behavior of chloride-coordinated molybdenum in ethaline was initially studied to determine if deposition was possible. Cyclic voltammetry was used to show that MoCl5 added to ethaline exhibits quasi-reversible behavior. Both the measured transfer coefficient and the precipitation of MoCl3 suggest that the reduction of MoCl5 in ethaline is a two-electron transfer reaction where the oxidation state of molybdenum in the product is Mo(III). No deposit was formed with the use of …

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Superconducting Phase Transition In Inhomogeneous Chains Of Superconducting Islands, Eduard Ilin, Irina Burkova, Xiangyu Song, Michael V. Pak, Dmitri S. Golubev, Alexey Bezryadin Oct 2020

Superconducting Phase Transition In Inhomogeneous Chains Of Superconducting Islands, Eduard Ilin, Irina Burkova, Xiangyu Song, Michael V. Pak, Dmitri S. Golubev, Alexey Bezryadin

Faculty Publications

We study one-dimensional chains of superconducting islands with a particular emphasis on the regime in which every second island is switched into its normal state, thus forming a superconductor-insulator-normal metal (S-I-N) repetition pattern. As is known since Giaever tunneling experiments, tunneling charge transport between a superconductor and a normal metal becomes exponentially suppressed, and zero-bias resistance diverges, as the temperature is reduced and the energy gap of the superconductor grows larger than the thermal energy. Here we demonstrate that this physical phenomenon strongly impacts transport properties of inhomogeneous superconductors made of weakly coupled islands with fluctuating values of the critical …

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Laboratory Evaluation Of The Residue Of Rubber-Modified Emulsified Asphalt, Dongdong Ge, Xiaodong Zhou, Siyu Chen, Dongzhao Jin, Zhanping You Oct 2020

Laboratory Evaluation Of The Residue Of Rubber-Modified Emulsified Asphalt, Dongdong Ge, Xiaodong Zhou, Siyu Chen, Dongzhao Jin, Zhanping You

Michigan Tech Publications, Part 1

Emulsified asphalt has been widely used in various surface treatment methods such as chip seal for low-volume road preservation. Using modified emulsified asphalt made it possible to use chip seal technology on medium-and even high-volume traffic pavements. The main objective of the study is to quantify the residue characteristics of rubber-modified emulsified asphalt and to assess the effectiveness of using crumb rubber to modify emulsified asphalt binder. The four emulsified asphalt residues used the distillation procedure. Then, the rheology characteristics of emulsified asphalt residue were evaluated. The Fourier transform infrared spectroscopy (FTIR) test analyzed the chemical change of emulsified asphalt …

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التعليم الهندسي ومتطلبات سوق العمل برامج هندسة القوى الكهربائية كحالة دراسة, Salah Abdlsattar, Fathi Allayth, Kamel Shoush Oct 2020

التعليم الهندسي ومتطلبات سوق العمل برامج هندسة القوى الكهربائية كحالة دراسة, Salah Abdlsattar, Fathi Allayth, Kamel Shoush

Al Jinan الجنان

The University has an important role in society in three main axes; education, scientific research and community services where the progress of nations is measured with its strength, the degree of preparation, and kept abreast of the requirements of the times. Because of the fact that the university is made up - at the end - of study plans and programs and also in order to overcome to compete with graduates locally, regionally and internationally, the most important functions of the university asa whole and departments in particular are the preparation of strong plans and study programs for all disciplines …

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The Lack Of Fire Safety Knowledge And Implementation The Case Of High-Rise Buildings, Mohamad Abou Chakra Oct 2020

The Lack Of Fire Safety Knowledge And Implementation The Case Of High-Rise Buildings, Mohamad Abou Chakra

Architecture and Planning Journal (APJ)

High-rise buildings are growing rapidly in number around the world. They are becoming important landmarks that mark out certain geographical areas. The fires of high-rise building have many characters not found in traditional low-rise buildings, like the variety of blazing factors, ways of fire spreading, and difficulty of evacuation. Hence, the protection features of conventional fire methods are not sufficient in designing towers. The paper, at first, summarizes the characteristics of high-rise buildings and fires, the unique features of Tall Buildings and the special life safety requirements for the high-rise buildings. Consequently, the topic of fire and life safety codes …

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Evaluation Of Bearing Voltage Reduction In Electric Machines By Using Insulated Shaft And Bearings, Peng Han, Greg Heins, Dean Patterson, Mark Theile, Dan M. Ionel Oct 2020

Evaluation Of Bearing Voltage Reduction In Electric Machines By Using Insulated Shaft And Bearings, Peng Han, Greg Heins, Dean Patterson, Mark Theile, Dan M. Ionel

Power and Energy Institute of Kentucky Faculty Publications

Bearing voltages and corresponding currents in electric machines driven by pulse width modulation (PWM) converters with fast switching and high dv/dt can cause premature bearing failures. This paper evaluates the bearing voltage reduction by using insulated shafts and bearings. An equivalent circuit representation of electric machines taking into account high-frequency effects is developed to show the production mechanism of bearing voltage, based on which simulations are performed with detailed finite element models for transient and simplified equivalent circuit for steady-state analysis. The steady-state equivalent circuit is then calibrated, by combined numerical calculations and experimental measurements, and used to predict the …

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The Optical Slave Flash Trigger Circuit Design, Set-Up, And Causes Of Failure, Miranda Shook Oct 2020

The Optical Slave Flash Trigger Circuit Design, Set-Up, And Causes Of Failure, Miranda Shook

Engineering Student Trade Journal Articles

Often the perfect picture requires more than the provided ambient light and the in-camera flash. These design requirements lead to a low-cost device, that adds an additional flash triggered by the camera flash.

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Using 3d Nand Flash Memory In Ssds To Improve Storage And Performance, Daniel Welch Oct 2020

Using 3d Nand Flash Memory In Ssds To Improve Storage And Performance, Daniel Welch

Engineering Student Trade Journal Articles

[excerpt] In the rapid development process of data storage, 3D NAND is the next generation of this technology in which the semiconductor flash cells of the solid-state drive (SSD) are stacked vertically to increase storage density and read / write efficiency. Originally announced by Toshiba in 2007, but with Samsung creating the first commercially available 3D NAND SSD in 2013, the technology is still extremely new to the market. Despite this, it has already proven to be far more effective and reliable than its 2D NAND counterpart. However, the question remains is it worth the upgrade.

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Do The Costs Of Electric Cars Outweigh The Benefits, Elaina Bednarczyk Oct 2020

Do The Costs Of Electric Cars Outweigh The Benefits, Elaina Bednarczyk

Engineering Student Trade Journal Articles

As electric vehicles have become more popular over the years and new technology is advancing to make them more efficient. It has come into question on whether or not the environmental and economic costs outweigh the benefits of having the vehicle?

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System Design And Controller Interface Of Spacecraft Reaction Wheels, Alexander Appel Oct 2020

System Design And Controller Interface Of Spacecraft Reaction Wheels, Alexander Appel

Engineering Student Trade Journal Articles

System configuration and design for a three-axis reaction wheel array and corresponding controller for adjusting the rotation of a spacecraft.

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Deep Brain Stimulation Correct Electrode Placement Within The Brain, Larissa Ptak Oct 2020

Deep Brain Stimulation Correct Electrode Placement Within The Brain, Larissa Ptak

Engineering Student Trade Journal Articles

How to more accurately place electrodes on the brain to increase the success of surgery and minimize risks to the patient.

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The Use Of Improved Digital Signal Processing In Quadcopter Stability With Varying Wind Conditions, Thomas Panek Oct 2020

The Use Of Improved Digital Signal Processing In Quadcopter Stability With Varying Wind Conditions, Thomas Panek

Engineering Student Trade Journal Articles

The use of quadcopters in photography requires precise levels of stabilization despite unfavorable wind conditions. The DSP used must be able to stabilize both the drone and gimbal in order to do so.

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Bluetooth Applicability In High-Fidelity Audio Systems, Garrett Scheiber Oct 2020

Bluetooth Applicability In High-Fidelity Audio Systems, Garrett Scheiber

Engineering Student Trade Journal Articles

Do the abilities of Bluetooth technology allow for its use as a transmission medium for high quality audio?

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Applications Of Wireless Communication Systems For Use In Avionics, Jennifer Lane Oct 2020

Applications Of Wireless Communication Systems For Use In Avionics, Jennifer Lane

Engineering Student Trade Journal Articles

[from Introduction] Improvements in the aerospace industry are requiring more diverse applications of wireless communication devices. Avionics requires lightweight systems that can maintain efficacy while under varying conditions. Since there are both advantages and disadvantages when using certain components in specific conditions, it is paramount to choose the correct implementation respective to the desired results.

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Using Active Power Factor Correction In Power Supplies To Improve Power Quality, Luke Freigang Oct 2020

Using Active Power Factor Correction In Power Supplies To Improve Power Quality, Luke Freigang

Engineering Student Trade Journal Articles

[excerpt] In the most basic terms, a power supply converts the high voltage AC power delivered by outlets to lower voltage DC power usable by most devices. It does this with a bridge rectifier and several transformers. However, without a few key modifications power supplies can drastically reduce the quality of the power being supplied to a device.

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Using Gyroscopes To Enhance Motion Detection, Adam Meyer Oct 2020

Using Gyroscopes To Enhance Motion Detection, Adam Meyer

Engineering Student Trade Journal Articles

Gyroscopes are used to stabilize, guide, and measure rotational motion. How can these devices be used to enhance motion detectors, and what benefits do they possess? We will explore these answers through analyzing the functionality and usage of gyroscopes in this trade article.

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Finding Electromagnetic Fields And Waves From The Heart And Body, Braden Updike Oct 2020

Finding Electromagnetic Fields And Waves From The Heart And Body, Braden Updike

Engineering Student Trade Journal Articles

Looking into the electric and magnetic field that is produced by the heart, finding the theoretical electromagnetic wave that made from each beat.

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Cpu Vulnerabilities And Operating System Response To Them, Josh Chica Oct 2020

Cpu Vulnerabilities And Operating System Response To Them, Josh Chica

Engineering Student Trade Journal Articles

How operating systems have responded CPU vulnerabilities like Spectre and Meltdown that attack the fundamentals of how a CPU works, and how this will affect future developments in OS and CPU design.

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Using Electrical Stimulus To Drive Healthy Hearts, Jay Mccrorey Oct 2020

Using Electrical Stimulus To Drive Healthy Hearts, Jay Mccrorey

Engineering Student Trade Journal Articles

[from Introduction] Nearly half (48%) of all adults in the United States have some type of cardiovascular disease, according to the American Heart Association’s Heart and Stroke Statistics 2019 update. This statistic drives an interest in heart healthy diets, but what about the unlucky portion of the 48% who inherit cardiovascular disease genetically.

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