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Articles 4531 - 4560 of 75062
Full-Text Articles in Engineering
Nonlinear Model Predictive Control Of Heaving Wave Energy Converter With Nonlinear Froude–Krylov Forces, Tania Demonte Gonzalez, Enrico Anderlini, Houssein Yassin, Gordon Parker
Nonlinear Model Predictive Control Of Heaving Wave Energy Converter With Nonlinear Froude–Krylov Forces, Tania Demonte Gonzalez, Enrico Anderlini, Houssein Yassin, Gordon Parker
Michigan Tech Publications
Wave energy holds significant promise as a renewable energy source due to the consistent and predictable nature of ocean waves. However, optimizing wave energy devices is essential for achieving competitive viability in the energy market. This paper presents the application of a nonlinear model predictive controller (MPC) to enhance the energy extraction of a heaving point absorber. The wave energy converter (WEC) model accounts for the nonlinear dynamics and static Froude–Krylov forces, which are essential in accurately representing the system’s behavior. The nonlinear MPC is tested under irregular wave conditions within the power production region, where constraints on displacement and …
Topography Of The 410 And 660 Km Discontinuities Beneath The Tibetan Plateau And Adjacent Areas, Zexin Miao, Stephen S. Gao, Muchen Sun, Kelly H. Liu
Topography Of The 410 And 660 Km Discontinuities Beneath The Tibetan Plateau And Adjacent Areas, Zexin Miao, Stephen S. Gao, Muchen Sun, Kelly H. Liu
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
To investigate the three-dimensional spatial distribution of subducted oceanic slab segments and their consequential effect on the thermal and hydrous composition of the mantle transition zone (MTZ) beneath the entire Tibetan Plateau, we conducted a comprehensive analysis of approximately 655,000 P-to-s receiver functions (RFs), obtained from 735 broadband seismic stations. These RFs were utilized to delineate the 410 km (d410) and 660 km (d660) seismic discontinuities, which represent the upper and lower boundaries of the MTZ, respectively. The RFs were grouped within circular bins with a radius of 1 degree and stacked to image the discontinuities. The mean apparent depths …
Comparison Of Outlier Detection Approaches For Compressive Strength Of Cement-Based Mortars, Nara Cangussu, Paula Milheiro-Oliveira, Ana Mafalda Matos, Farhad Aslani, Lino Maia
Comparison Of Outlier Detection Approaches For Compressive Strength Of Cement-Based Mortars, Nara Cangussu, Paula Milheiro-Oliveira, Ana Mafalda Matos, Farhad Aslani, Lino Maia
Research outputs 2022 to 2026
EN 196-1 states that the compressive strength result of testing of standard mortar specimens corresponds to the average of the six individual measurements. If one of the six individual measurements varies more than ±10 % from the average, it must be excluded, and a new average is calculated with the five remaining values. This methodology might be interesting for quality control or characterization of cement; however, it may not be the best approach for research or scientific purposes. Applying EN 196-1 to non-standard cement-based mortars with multiple and even unconventional supplementary cementitious materials may induce even more variation in the …
Cross-Track Seabed Imaging And Buried Object Detection With A Multibeam Sonar, Charles W. Holland, Samuel Pinson, Daniel L. Orange, Cody R. Henderson
Cross-Track Seabed Imaging And Buried Object Detection With A Multibeam Sonar, Charles W. Holland, Samuel Pinson, Daniel L. Orange, Cody R. Henderson
Electrical and Computer Engineering Faculty Publications and Presentations
What lies underneath the ocean floor is of interest to a wide variety of disciplines. The focus here is imaging the upper tens of meters of material beneath the seafloor. The sub-bottom profiler is a valuable tool to that end, producing a 2-D image in depth below the seafloor and along the track of the ship. Geoscientists and engineers are frequently interested in not only the subseabed beneath the ship but also either side or cross-track of the ship. We show an approach to cross-track imaging using a low-frequency multibeam sub-bottom profiler. The main result is the detection of a …
A Deep Autoencoder For Electric Double Layer Capacitance Prediction In Electrochemical Sensors, Mason Mcgarrity, Feng Zhao
A Deep Autoencoder For Electric Double Layer Capacitance Prediction In Electrochemical Sensors, Mason Mcgarrity, Feng Zhao
Electrical and Computer Engineering Faculty Research & Creative Works
This study explores the application of a deep autoencoder neural network to accurately predict the electric double layer capacitance from real-world parameters in binary, asymmetric electrolytes under low concentration conditions. By utilizing a modest simulation-based dataset of just 250 samples, the deep autoencoder neural network model developed in this study effectively predicted the capacitance by learning the critical features and relationships of the electric double layer model and encoding this learned representation into a low-dimensional latent space. From the latent variables, the decoder block of the neural network learned to effectively recreate the high-dimensional input. To enhance the model's robustness, …
Lifetimes Of Stable Solutions To The Planar Three-Body Problem, Revealed In Patterns Of Fractal Art, Charles F. Babbs
Lifetimes Of Stable Solutions To The Planar Three-Body Problem, Revealed In Patterns Of Fractal Art, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Working Papers
This preliminary study explores statistical prediction of the lifetimes of apparently stable orbits of three particle masses, mutually attracted by gravity in the planar three body problem. Most orbits eventually break up, commonly in an end state with two of the bodies orbiting each other and moving together in one direction, with the third body moving in the opposite direction. Studies of such escape events led to a novel hypothesis, emerging from the intersection of probability, statistics, chaos, and fractal art. Statistical estimates of a constant probability of breakup per unit time allow prediction of the times of breakup of …
A Concept Of Controlling Grover Diffusion Operator: A New Approach To Solve Arbitrary Boolean-Based Problems, Ali Al-Bayaty, Marek A. Perkowski
A Concept Of Controlling Grover Diffusion Operator: A New Approach To Solve Arbitrary Boolean-Based Problems, Ali Al-Bayaty, Marek A. Perkowski
Electrical and Computer Engineering Faculty Publications and Presentations
A controlled-diffusion operator for Boolean oracles is designed as a new approach for Grover’s algorithm to search for solutions for arbitrary logical structures of such oracles, since the Grover diffusion operator is not able to find correct solutions for some logical structures of Boolean oracles. We also show that the Phase oracles do not work sometimes correctly using the Grover diffusion operator. Our proposed controlled-diffusion operator relies on the states of output qubit, as the reflection of Boolean decisions from a Boolean oracle without relying on the phase kickback. We prove that on many examples of Boolean and Phase oracles …
Towards An Iot-Enabled Digital Earth For Sdgs: The Data Quality Challenge, Msb Syed, Paula Kelly, Paul Stacey, Damon Berry
Towards An Iot-Enabled Digital Earth For Sdgs: The Data Quality Challenge, Msb Syed, Paula Kelly, Paul Stacey, Damon Berry
Articles
Digital Earth (DE), a technology offering real-time visualisation of Earth's processes, has shown promising results in aiding decision-making for a sustainable world, raising awareness about individual impacts on our planet, and supporting the United Nations Sustainable Development Goals (UN SDGs) agenda. However, both DE and SDGs face a common obstacle: Data Quality (DQ). This review investigates the challenge of DQ in the context of DE for SDGs and explores how IoT can address this challenge and extend the reach of DE to support SDGs. Furthermore, the study discusses three core aspects; first, the potential of IoT as a data source …
Durability Investigation Of Ultra-Thin Polyurethane Wearing Course For Asphalt Pavement, Wenguang Wang, Baodong Liu, Dongzhao Jin, Miao Yu, Junsen Zeng
Durability Investigation Of Ultra-Thin Polyurethane Wearing Course For Asphalt Pavement, Wenguang Wang, Baodong Liu, Dongzhao Jin, Miao Yu, Junsen Zeng
Michigan Tech Publications
In this study, a wear-resistant ultra-thin wear layer was fabricated with polyurethane as an adhesive to investigate its durability for pavement applications. Its road performance was investigated based on indoor tests. First, the abrasion test was performed using a tire–pavement dynamic friction analyzer (TDFA), and the surface elevation information of the wear layer was obtained by laser profile scanning. The relationship between the anti-skid properties of the wear layer and the macro-texture was analyzed. Second, a Fourier infrared spectrometer and scanning electron microscope were employed to analyze the evolution of polyurethane aging properties in the pull-out test and accelerated ultraviolet …
Monte Carlo Calculations Of Target Fragments From Helium And Carbon Ion Interactions With Water, Quazi Muhammad Rashed Nizam, Asif Ahmed, Iftekhar Ahmed, Lembit Sihver
Monte Carlo Calculations Of Target Fragments From Helium And Carbon Ion Interactions With Water, Quazi Muhammad Rashed Nizam, Asif Ahmed, Iftekhar Ahmed, Lembit Sihver
Informatics and Engineering Systems Faculty Publications
When high energetic heavy ions interact with any target, short range, high linear energy transfer (LET) target fragments are produced. These target fragments (TFs) can give a significant dose to the healthy tissue during heavy ion cancer therapy, and when cosmic radiation interacts with astronauts. This paper presents Monte Carlo simulations, using the Particle and Heavy Ion Transport code System (PHITS), to characterize target fragments from reactions of helium and carbon ions with water. The calculated ranges, LET, doses, and production cross sections are presented. It is shown that protons, deuterons, tritons, alpha particles, 3He, 6He, …
Long-Distance Photon-Mediated And Short-Distance Entangling Gates In Three-Qubit Quantum Dot Spin Systems, Nooshin M. Estakhri, Ada Warren, Sophia E. Economou, Edwin Barnes
Long-Distance Photon-Mediated And Short-Distance Entangling Gates In Three-Qubit Quantum Dot Spin Systems, Nooshin M. Estakhri, Ada Warren, Sophia E. Economou, Edwin Barnes
Engineering Faculty Articles and Research
Superconducting resonator couplers will likely become an essential component in modular semiconductor quantum dot (QD) spin qubit processors, as they help alleviate crosstalk and wiring issues as the number of qubits increases. Here, we focus on a three-qubit system composed of two modules: a two-electron triple QD resonator coupled to a single-electron double QD. Using a combination of analytical techniques and numerical results, we derive an effective Hamiltonian that describes the three-qubit logical subspace and show that it accurately captures the dynamics of the system. We examine the performance of short-range and long-range entangling gates, revealing the effect of a …
Novel Insights On The Setting Process, Hardened Properties, And Durability Of Sustainable Ultra-High-Performance Seawater Sea Sand Concrete, Wei Zhang, Dawei Ding, Jianxing Sun, Feng Guo, Haibao Feng, Hongyan Ma, Shuxian Hong, Biqin Dong, Dongshuai Hou
Novel Insights On The Setting Process, Hardened Properties, And Durability Of Sustainable Ultra-High-Performance Seawater Sea Sand Concrete, Wei Zhang, Dawei Ding, Jianxing Sun, Feng Guo, Haibao Feng, Hongyan Ma, Shuxian Hong, Biqin Dong, Dongshuai Hou
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Using seawater and sea sand to prepare concrete could effectively alleviate the shortage of freshwater and river sand resources and promote the sustainable development of concrete. However, the current research on the setting process, hardened properties, and sustainability of ultra-high-performance seawater sea sand concrete (UHPSSC) remain considerably limited. In this paper, the UHPSSC was designed to mitigate the autogenous shrinkage and enhance the sustainability, and the effect of seawater, untreated and desalinated sea sand on the setting process, mechanical properties, durability, and sustainability was explored by various tests. Results show that the abundant ions (e.g., Cl- and SO42-) in seawater …
Editorial For The Special Issue On Nanomaterials For Micro/Nanodevices, Amir Hussain Idrisi
Editorial For The Special Issue On Nanomaterials For Micro/Nanodevices, Amir Hussain Idrisi
Michigan Tech Publications
The Special Issue of Micromachines, titled "Nanomaterials for Micro/Nanodevices", comprehensively examines the intersection of nanotechnology and micro/nanodevices [...].
Experimentally Validated Dynamic Equivalent Circuit Model Of Perovskite Solar Cells: Utilizing Machine Learning Algorithms For Parameter Extraction Using I-V And C-V Characteristics, Zahraa Ismail, Eman Sawires, Fathy Amer, Sameh O. Abdellatif
Experimentally Validated Dynamic Equivalent Circuit Model Of Perovskite Solar Cells: Utilizing Machine Learning Algorithms For Parameter Extraction Using I-V And C-V Characteristics, Zahraa Ismail, Eman Sawires, Fathy Amer, Sameh O. Abdellatif
Electrical Engineering
No abstract provided.
On The Turbulent Viscosity Parameter Cμ In The K–Ε Model, Harshit Mishra, Subhas Karan Venayagamoorthy
On The Turbulent Viscosity Parameter Cμ In The K–Ε Model, Harshit Mishra, Subhas Karan Venayagamoorthy
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The Reynolds-averaged Navier–Stokes (RANS) models depend on empirical constants to close the Reynolds stress terms. The empirical constants were obtained using experiments conducted at low Reynolds numbers several decades ago. In this paper, we revisit the turbulent viscosity parameter Cμ, based on the stress–intensity ratio c2 = |uw|/k. Here, |uw| and k are the absolute values of the Reynolds stress and turbulent kinetic energy, respectively. Through a priori comparisons, we find that the currently accepted value of Cμ = 0.09 does not agree with the latest direct numerical simulation (DNS) and experimental datasets of wall-bounded turbulent planar flows. Therefore, …
Advances In Electrospun Poly(Ε-Caprolactone)-Based Nanofibrous Scaffolds For Tissue Engineering, Karla N. Robles, Fatima Tuz Zahra, Richard Mu, Todd Giorgio
Advances In Electrospun Poly(Ε-Caprolactone)-Based Nanofibrous Scaffolds For Tissue Engineering, Karla N. Robles, Fatima Tuz Zahra, Richard Mu, Todd Giorgio
Agricultural and Environmental Sciences Faculty Research
Tissue engineering has great potential for the restoration of damaged tissue due to injury or disease. During tissue development, scaffolds provide structural support for cell growth. To grow healthy tissue, the principal components of such scaffolds must be biocompatible and nontoxic. Poly(ε-caprolactone) (PCL) is a biopolymer that has been used as a key component of composite scaffolds for tissue engineering applications due to its mechanical strength and biodegradability. However, PCL alone can have low cell adherence and wettability. Blends of biomaterials can be incorporated to achieve synergistic scaffold properties for tissue engineering. Electrospun PCL-based scaffolds consist of single or blended-composition …
A Review Of Geopolymer Binder As A Grouting Material, Karla Sierra, Jinwoo An, Ryan Shamet, Jiannan Chen, Yong Je Kim, Boo Hyun Nam, Philip Park
A Review Of Geopolymer Binder As A Grouting Material, Karla Sierra, Jinwoo An, Ryan Shamet, Jiannan Chen, Yong Je Kim, Boo Hyun Nam, Philip Park
Civil Engineering Faculty Publications
The utilization of geopolymer as a grouting material has gained significant attention in research and construction applications. Geopolymer grout is a type of binding material that differs from traditional grouts, typically based on Portland cement. Researchers have explored its effectiveness and potential applications in grouting processes, considering its unique properties and characteristics. In this paper, various studies employing and utilizing geopolymer as a grouting material are reviewed. The emphasis is on mixture design of geopolymer grout, physical property, chemical composition of geopolymer grout, rheological behavior of geopolymer grout such as yield stress (in case of Bingham fluid) and viscosity, and …
A Simple And Fast Optical Clearing Method For Whole-Mount Fluorescence In Situ Hybridization (Fish) Imaging, Junwoo Suh, Yehe Liu, Jordan Smith, Michiko Watanabe, Andrew M. Rollins, Michael W. Jenkins
A Simple And Fast Optical Clearing Method For Whole-Mount Fluorescence In Situ Hybridization (Fish) Imaging, Junwoo Suh, Yehe Liu, Jordan Smith, Michiko Watanabe, Andrew M. Rollins, Michael W. Jenkins
Faculty Scholarship
We report a single-step optical clearing method that is compatible with RNA fluorescence in situ hybridization (FISH) imaging. We previously demonstrated microscopy imaging with immunohistochemistry and genetic reporters using a technique called lipid-preserving refractive index matching for prolonged imaging depth (LIMPID). Our protocol reliably produces high-resolution three-dimensional (3D) images with minimal aberrations using high magnification objectives, captures large field-of-view images of whole-mount tissues, and supports co-labeling with antibody and FISH probes. We also custom-designed FISH probes for quail embryos, demonstrating the ease of fabricating probes for use with less common animal models. Furthermore, we show high-quality 3D images using a …
Performance Enhancement Of Vanadium Redox Flow Battery With Novel Streamlined Design: Simulation And Experimental Validation, Abdulmonem Fetyan, Bronston P. Benetho, Tawaddod Alkindi, Anugrah Andisetiawan, Musbaudeen O. Bamgbopa, Ayoob Alhammadi, Gumaa A. El-Nagar
Performance Enhancement Of Vanadium Redox Flow Battery With Novel Streamlined Design: Simulation And Experimental Validation, Abdulmonem Fetyan, Bronston P. Benetho, Tawaddod Alkindi, Anugrah Andisetiawan, Musbaudeen O. Bamgbopa, Ayoob Alhammadi, Gumaa A. El-Nagar
All Works
Electrolyte utilization and the consequent concentration polarization significantly limit the potential increase in power density and contribute to electrode degradation in vanadium redox flow batteries during cycling. This study investigates a novel curvature streamlined design, drawing inspiration from natural forms, aiming to enhance the performance of vanadium redox flow battery cells compared to conventional square and rectangular flow-through cell designs. The simulated 3D single-cell model shows a notably superior uniformity in both current and species' concentration distribution within the streamlined design compared to the square and rectangular shapes. Experimental analysis conducted on 3D-printed flow frames demonstrated 2 % enhanced energy …
Experimental Investigation Of Vertical Axis Wind Turbine Performance Using Bio-Inspired Blades, Ahmed Elbaz
Experimental Investigation Of Vertical Axis Wind Turbine Performance Using Bio-Inspired Blades, Ahmed Elbaz
Mechanical Engineering
Vertical Axis Wind Turbines (VAWT) are becoming a key player in small wind power applications. Recent research on turbine performance focused on methods to augment turbine performance to secure a more efficient and reliable wind energy conversion system to electrical power. Most of these research works rely on Computational Fluid Dynamics (CFD) simulations given the excessive cost of wind tunnel testing. Many research papers investigated innovative blade shapes in order to improve turbine performance. In the present paper, a new bioinspired, blade shape is proposed to enhance the power output of VAWT. This shape is based on modifying NACA 0018 …
Study Of Am Electrodeposition From Amcl₃-Licl-Kci Molten Salt, Rohan Akolkar, Christine E. Duval
Study Of Am Electrodeposition From Amcl₃-Licl-Kci Molten Salt, Rohan Akolkar, Christine E. Duval
Faculty Scholarship
In this work, the electrodeposition reaction of Am in AmCl₃LiCl-KCl molten salt was studied using voltammetry and chronoamperometry. Electrodeposition of Am was shown to proceed via a two − step reaction scheme, involving the one-electron transfer reduction of Am³⁺ to Am²⁺, followed by the two-electron transfer reduction of intermediate Am²⁺ to Am⁰. A low Coulombic efficiency of Am deposition was measured despite the Am deposition occurring within the thermodynamic stability window of the supporting LiCl-KCl electrolyte. We hypothesize that the low efficiency is due to out-diffusion of the intermediate Am²⁺ species away from the electrode surface. Experimental observations provide evidence …
Delta Airlines Company Analysis, Brendan Aug
Delta Airlines Company Analysis, Brendan Aug
Aviation Student Publications
No abstract provided.
Ground Stop Analysis, Brendan Aug
Ground Stop Analysis, Brendan Aug
Aviation Student Publications
This study intends to analyze a selection of flight data from 2021 and 2022 from UND Aerospace to determine how much time is spent in stopped on the ground, with the engines running, prior to takeoff, during training flights. This study also hopes to explore some of the factors that may cause extended ground stop times and determine if there are any areas that warrant further study in the future.
Advanced Air Mobility (Aam) Is Coming To A Town Near You...Are You Ready?, Sarah Nilsson
Advanced Air Mobility (Aam) Is Coming To A Town Near You...Are You Ready?, Sarah Nilsson
Publications
This briefing provides a high and low altitude view of what is coming in the way of Advanced Air Mobility (AAM) innovation. It is meant for county, town, or city officials; tribal governments; local businesspersons; airport, heliport, Fixed Base Operator (FBO), flight schools’ owners/operators; and other individuals; who wish to capitalize on, and prepare for, a US industry expected to hit around USD 68 Billion by 2032. Is your community or organization prepared for this new economy? Are your customers, or constituents accepting of these new technologies? Are you ready to capitalize on this AAM market and all the growth …
Digital Assessments For Children And Adolescents With Adhd: A Scoping Review, Franceli L. Cibrian, Elissa M. Monteiro, Kimberley D. Lakes
Digital Assessments For Children And Adolescents With Adhd: A Scoping Review, Franceli L. Cibrian, Elissa M. Monteiro, Kimberley D. Lakes
Engineering Faculty Articles and Research
Introduction: In spite of rapid advances in evidence-based treatments for attention deficit hyperactivity disorder (ADHD), community access to rigorous gold-standard diagnostic assessments has lagged far behind due to barriers such as the costs and limited availability of comprehensive diagnostic evaluations. Digital assessment of attention and behavior has the potential to lead to scalable approaches that could be used to screen large numbers of children and/or increase access to high-quality, scalable diagnostic evaluations, especially if designed using user-centered participatory and ability-based frameworks. Current research on assessment has begun to take a user-centered approach by actively involving participants to ensure the development …
M3t-Lm: A Multi-Modal Multi-Task Learning Model For Jointly Predicting Patient Length Of Stay And Mortality, Junde Chen, Qing Li, Feng Liu, Yuxin Wen
M3t-Lm: A Multi-Modal Multi-Task Learning Model For Jointly Predicting Patient Length Of Stay And Mortality, Junde Chen, Qing Li, Feng Liu, Yuxin Wen
Engineering Faculty Articles and Research
Ensuring accurate predictions of inpatient length of stay (LoS) and mortality rates is essential for enhancing hospital service efficiency, particularly in light of the constraints posed by limited healthcare resources. Integrative analysis of heterogeneous clinic record data from different sources can hold great promise for improving the prognosis and diagnosis level of LoS and mortality. Currently, most existing studies solely focus on single data modality or tend to single-task learning, i.e., training LoS and mortality tasks separately. This limits the utilization of available multi-modal data and prevents the sharing of feature representations that could capture correlations between different tasks, ultimately …
Enhanced Piezo-Response Of Mixed-Cation Copper Perovskites With Cl/Br Halide Engineering, Amr Elattar, Christopher Munoz, Libor Kobera, Andrii Mahun, Jiri Brus, Mohammed J. Uddin, Yasuhiko Hayashi, Okenwa Okoli, Tarik Dickens
Enhanced Piezo-Response Of Mixed-Cation Copper Perovskites With Cl/Br Halide Engineering, Amr Elattar, Christopher Munoz, Libor Kobera, Andrii Mahun, Jiri Brus, Mohammed J. Uddin, Yasuhiko Hayashi, Okenwa Okoli, Tarik Dickens
Mechanical Engineering Faculty Publications
Halide and cation engineering of organic–inorganic hybrid perovskites has shown a great potential for structural modulation of perovskites and enhancing their optoelectronic properties. Here, we studied the impact of Cl/Br halide engineering on the structural and piezoelectric properties of MA/Cs mixed-cation Cu-perovskite crystals. X-ray diffraction, Raman spectroscopy, and 133Cs solid-state NMR were utilized to find out the nature of the perovskite crystal structure formation. Three distinct crystal structures were obtained depending on the Cl/Br content. High Cl content resulted in the formation of Br-doped (Cs/MA)CuCl3 perovskite with the presence of paramagnetic Cu2+ ions. High Br content led to the formation …
Atomic Layer Deposition Of Ru Nanoclusters On Ba-Laceox: A Highly Efficient Catalyst For Ammonia Synthesis Under Mild Conditions, Kaiying Wang, Baitang Jin, Xiaoqing He, Xinhua Liang
Atomic Layer Deposition Of Ru Nanoclusters On Ba-Laceox: A Highly Efficient Catalyst For Ammonia Synthesis Under Mild Conditions, Kaiying Wang, Baitang Jin, Xiaoqing He, Xinhua Liang
Chemical and Biochemical Engineering Faculty Research & Creative Works
Ammonia synthesis has significant implications for global energy and environmental issues, driving the need for highly active catalysts that operate under mild conditions. This study reports the successful deposition of uniform ∼1.0 nm metallic ruthenium (Ru) nanoclusters onto Ba-LaCeOx particles via atomic layer deposition (ALD). The catalytic performance of the ALD-prepared Ru nanoclusters was assessed for ammonia synthesis and compared with two catalysts produced by conventional incipient wetness impregnation. For the ALD-prepared Ru nanoclusters, a pre-reaction H2-reduction step induced partial encapsulation of suboxide species on Ru sites due to strong metal-support interactions, limiting Ru nanocluster sintering and …
Performance Of Ag‑Doped Cuo Nanoparticles For Photocatalytic Activity Applications: Synthesis, Characterization, And Antimicrobial Activity, Samar A. Salim, Ahmed Mosleh, Elbadawy A. Kamoun, Shahira H El-Moslamy, Heba Zahran, Samer Zyoud, Ibrahim Yahia
Performance Of Ag‑Doped Cuo Nanoparticles For Photocatalytic Activity Applications: Synthesis, Characterization, And Antimicrobial Activity, Samar A. Salim, Ahmed Mosleh, Elbadawy A. Kamoun, Shahira H El-Moslamy, Heba Zahran, Samer Zyoud, Ibrahim Yahia
Nanotechnology Research Centre
The auto-combustion method synthesized CuO NPs and Ag/CuO NPs. The Ag/CuO NPs were analyzed using Fourier-transform infrared, X-ray difraction, scanning electron microscope, and Energy-dispersive X-ray spectroscopy instrumental analyses. The energy band gap, as determined by DRS properties, decreases from 3.82 to 3.50 eV for pure CuO and 10% Ag/CuO NPs, respectively. The photodegradation efciency of Rhodamine-B & Carmine by 10% Ag/CuO NPs was nearly 98.9 and 97.8%, respectively. Antimicrobial trials revealed that the antimicrobial efficacy of Ag/CuO NPs at several dosages (20, 40, 60, 80, 100, and 120 µg/mL) against human pathogens was initially assessed using the agar well-diffusion method, …
Backup Subscription Scheme For Differential Protection Using Iec61850-9-2 Sampled Values, Mohammad Khalili Katoulaei, Aamir Rahmani, Hans Kristian Høidalen, Irina Oleinikova, Bruce A. Mork
Backup Subscription Scheme For Differential Protection Using Iec61850-9-2 Sampled Values, Mohammad Khalili Katoulaei, Aamir Rahmani, Hans Kristian Høidalen, Irina Oleinikova, Bruce A. Mork
Michigan Tech Publications
In IEC-61850-based digital substations, the protection IED’s performance is dependent on merging unit’s vendor implementation, communication networks, and measurement circuit’s health conditions. As the process bus Sampled Value(SV) enables the availability of all sensor data on a communication network, this paper proposes a Backup Subscription scheme (BSS) for a transformer differential protection (87T, PDIF) function. BSS utilizes sensor data in digital substations to achieve a flexible protection scheme using a dynamic subscription feature. Thus, in case of failure of one sensor, differential protection would be maintained. The paper presents the implementation and verification of a prototyped scheme using a Hardware-in-the-loop …