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2024 IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity, EMC+SIPI 2024

作者： Zhang, Dandan Mamolo, Steven Anurakparaorn, Kanat Xiao, Yiheng Michielssen, Eric Taub, Alan I. King Mongkut's Institute of Technology Ladkrabang Department of Industrial Engineering Bangkok Thailand University of Michigan Department of Electrical Engineering and Computer Science Ann ArborMI United States University of Michigan Department of Materials Science and Engineering Ann ArborMI United States University of Michigan Department of Aerospace Engineering Ann ArborMI United States University of Michigan Department of Mechanical Engineering Ann ArborMI United States

ISBN: (纸本)9798350360394

Computational modeling and optimization were utilized to design the metastructure of a polymer nanocomposite system. The goal is to minimize the reflection loss (RL) and broaden the absorption bandwidth. Truncated cones with a perfect electric conductor on the top surface were chosen. With this innovative metastructure, the absorption bandwidth of RL at -20dB has been increased from 0, as observed in non-porous materials, to 1.83 GHz. The samples with optimized metastructures were manufactured using hot pressing and computer numerical control (CNC) machining techniques. This approach provided an efficient way to design and precisely manufacture materials with targeted EM absorption. © 2024 IEEE.

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Evaluation of time-series database on microservice architecture for health monitoring system

Evaluation of time-series database on microservice architect...

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2022 International Symposium on Electronics and Smart Devices, ISESD 2022

作者： Simanjuntak, Eko Surantha, Nico Isa, Sani Muhamad Bina Nusantara University Binus Graduate Program-Master of Computer Science Computer Science Department Jakarta11480 Indonesia Tokyo City University Electronic and Communication Engineering Faculty of Engineering Department of Electrical Tokyo Japan

ISBN: (数字)9798350396607

ISBN: (纸本)9798350396607

Recently, the research on daily health monitoring using a wearable sensor has been continually evolving. In the future, when this system is actually implemented, a vast amount of data transmission will be conducted from multiple sensors to the cloud server. A system capable of transmitting, storing, processing, and visualizing massive volumes of data is necessary for health monitoring. This research aims to develop a health monitoring system that can accommodate a high amount of data with high performance. The proposed techniques include numerous modifications to system architecture and technology. In the system architecture, a multi-database is proposed to enhance the reliability of the system. As an enhancement to the technology aspect, a time series database and MQTT server are proposed. As the result, the proposed system achieves significantly better performance in terms of throughput, database-writing speed, and database-reading speed compared to the existing system. © 2022 IEEE.

关键词： Database systems

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JARVIS-Leaderboard:a large scale benchmark of materials design methods

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npj Computational materials 2024年第1期10卷 2280-2296页

作者： Kamal Choudhary Daniel Wines Kangming Li Kevin F.Garrity Vishu Gupta Aldo H.Romero Jaron T.Krogel Kayahan Saritas Addis Fuhr Panchapakesan Ganesh Paul R.C.Kent Keqiang Yan Yuchao Lin Shuiwang Ji Ben Blaiszik Patrick Reiser Pascal Friederich Ankit Agrawal Pratyush Tiwary Eric Beyerle Peter Minch Trevor David Rhone Ichiro Takeuchi Robert B.Wexler Arun Mannodi-Kanakkithodi Elif Ertekin Avanish Mishra Nithin Mathew Mitchell Wood Andrew Dale Rohskopf Jason Hattrick-Simpers Shih-Han Wang Luke E.K.Achenie Hongliang Xin Maureen Williams Adam J.Biacchi Francesca Tavazza Material Measurement Laboratory National Institute of Standards and TechnologyGaithersburgMD20899USA Department of Materials Science and Engineering University of Toronto27 King’s College CirTorontoONCanada Department of Electrical and Computer Engineering Northwestern UniversityEvanstonIL 60208USA Lewis-Sigler Institute for Integrative Genomics Princeton UniversityPrincetonNJ 08544USA Ludwig Institute for Cancer Research Princeton UniversityPrincetonNJ 08544USA Department of Physics and Astronomy West Virginia UniversityMorgantownWV 26506USA Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Center for Nanophase Materials Science Oak Ridge National LaboratoryOak RidgeTN 37831USA Computational Sciences and Engineering Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Department of Computer Science and Engineering Texas A&M UniversityCollege StationTX 77843USA Globus University of ChicagoChicagoIL 60637USA Data Science and Learning Division Argonne National LabLemontIL 60439USA Institute of Nanotechnology Karlsruhe Institute of TechnologyKaiserstraße 1276131 KarlsruheGermany Institute of Theoretical Informatics Karlsruhe Institute of TechnologyKaiserstraße 1276131 KarlsruheGermany Department of Chemistry and Biochemistry and Institute for Physical Science and Technology University of MarylandCollege ParkMD 20742USA Department of Physics Applied Physics and AstronomyRensselaer Polytechnic InstituteTroyNY12180USA Department of Materials Science and Engineering University of MarylandCollege ParkMD20742USA Department of Chemistry and Institute of Materials Science and Engineering Washington University in St.LouisSt.LouisMO63130USA School of Materials Engineering Purdue UniversityWest LafayetteIN47907USA Department of Mechanical Science and Engineering University of Illinois Urbana-ChampaignUrbanaIllinois 61801USA Materials Research Laboratory University of Illinois Urbana-ChampaignUrbanaIL 61801USA Theore

Lack of rigorous reproducibility and validation are significant hurdles for scientific development across many *** science,in particular,encompasses a variety of experimental and theoretical approaches that require careful *** efforts have been developed previously to mitigate these ***,a comprehensive comparison and benchmarking on an integrated platform with multiple data modalities with perfect and defect materials data is still *** work introduces JARVIS-Leaderboard,an open-source and community-driven platform that facilitates benchmarking and enhances *** platform allows users to set up benchmarks with customtasks and enables contributions in the form of dataset,code,and meta-data *** cover the following materials design categories:Artificial Intelligence(AI),Electronic Structure(ES).

关键词： rigorous perfect enable

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Layered Double Hydroxide Based Self-Powered Triboelectric Sensor for Biomechanical Motions 21

Layered Double Hydroxide Based Self-Powered Triboelectric Se...

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21st International Bhurban Conference on Applied sciences and Technology, IBCAST 2024

作者： Leonardi, Claudio Ur Rahman, Muhammad Saad Rehan, Fatima Giodano, Antonio Zia, Muhammad Ihzam Saleem, Mohsin Medaglia, Pier Gianni Khan, Usman University of Rome Tor Vergata Department of Industrial Engineering Via del Politecnico Roma Italy National University of Sciences and Technology School of Chemical and Materials Engineeing Islamabad Pakistan National University of Sciences and Technology School of Electrical Engineering and Computer Science Islamabad Pakistan National University of Sciences and Technology School of Chemical and Materials Engineering Islamabad Pakistan Chung Ang University School of Electrical and Electronics Engineering Seoul Korea Republic of

ISBN: (纸本)9798331516680

Sensing of biomechanical motions is advantageous for biomedical health monitoring. Here, we propose a layered double hydroxide (LDH) based triboelectric sensor (TES) for monitoring biomechanical motions. The triboelectric sensor is based on initially triboelectrification between the friction pair of LDH and aluminum and subsequently electrostatic induction in an external electric circuit due to the contact-separation of the two friction layers. To realize the triboelectric sensor, ZnAl-LDH is synthesized using an in-situ hydrothermal method resulting in a nanostructured ZnAl-LDH with high surface-to-volume ratio. The triboelectric sensor is self-powered as it generates a peak-to-peak output voltage (Vo) of ∼ 11 V across a load resistance of 1MΩ and a short circuit current (ISC) of ∼ 2.5μA in response to hand tapping. Since the triboelectric pulses (high voltages and very low currents) are not suited for conventional electronics, a two-stage-amplifier based interface circuit is designed to interface the sensor to a microcontroller. As proof of concept, the self-powered triboelectric sensor is interfaced with Arduino Mega 2560 microcontroller through the interface circuit. The sensorial system monitored the contact-separation induced by hand tapping and the counting information was displayed on a digital LCD. The self-powered LDH based triboelectric sensor along with the two-stage-amplifier based interface circuit provides a platform for monitoring various biomechanical motions including walking with applications in biomedical health monitoring. © 2024 IEEE.

关键词： Microcontrollers

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Decoding the Biomimetic Mineralization of Metal-Organic Frameworks in Water

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ACS Nano 2024年第36期18卷 25170-25182页

作者： Lin, Shang-Wei Lam, Phuc Khanh Wu, Chin-Teng Su, Kuan-Hsuan Sung, Chi-Fang Huang, Sen-Ruo Chang, Je-Wei Shih, Orion Yeh, Yi-Qi Vo, Trung Hieu Tsao, Heng-Kwong Hsieh, Haw-Ting Jeng, U-Ser Shieh, Fa-Kuen Yang, Hsiao-Ching Department of Chemistry Fu Jen Catholic University New Taipei City24205 Taiwan Department of Chemistry National Central University Taoyuan32001 Taiwan National Synchrotron Radiation Research Center Hsinchu Science Park Hsinchu300092 Taiwan Department of Chemical and Materials Engineering National Central University Taoyuan32001 Taiwan Department of Electrical Engineering and Computer Sciences University of California at Berkeley CA94720 United States Department of Chemical Engineering College of Semiconductor Research National Tsing Hua University Hsinchu300044 Taiwan

This study unveils the "green" metal-organic framework (MOF) structuring mechanism by decoding proton transfer in water during ZIF-8 synthesis. Combining in situ small- to wide-angle X-ray scattering, multiscale simulations, and quantum calculations, we reveal that the ZIF-8 early-stage nucleation and crystallization process in aqueous solution unfolds in three distinct stages. In stage I, imidazole ligands replace water in zinc-water cages, triggering an "acidity flip" that promotes proton transfer. This leads to the assembly of structures from single zinc ions to 3D amorphous cluster nuclei. In stage II, amorphous nuclei undergo a critical transformation, evolving into crystalline nuclei and subsequently forming mesoscale-ordered structures and crystallites. The process proceeds until the amorphous precursors are completely consumed, with the transformation kinetics governed by an energy barrier that determines the rate-limiting step. In stage III, stable crystallite nanoparticles form in solution, characterized by a temperature-dependent thermal equilibrium of molecular interactions at the crystal-solution interface. Beyond these core advancements, we explore the influence of encapsulated pepsin and nonencapsulated lysozyme on ZIF-8 formation, finding that their amino acid proton transfer capacity and concentration influence the resulting biomolecule-MOF composite’s shape and encapsulation efficiency. The findings contribute to understanding the molecular mechanisms behind biomimetic mineralization and have potential implications for engineering proteins within amorphous MOF nuclei as protein embryo growth sites. © 2024 American Chemical Society.

关键词： X ray scattering

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Experimental demonstration of a flexible-grid 1×(2×3)mode-and wavelength-selective switch using silicon microring resonators and counter-tapered couplers

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Chinese Optics Letters 2024年第1期22卷 52-58页

作者：孔德军鲁昊汪鹏君符强戴世勋陈伟伟王栎沣张波豪马凌霄李军戴庭舸杨建义 Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou 325035China College of Science and Technology Ningbo UniversityNingbo 315300China Laboratory of Infrared Materials and Devices The Research Institute of Advanced TechnologiesNingbo UniversityNingbo 315211China Department of Information Science and Electronics Engineering and Cyrus Tang Center for Sensor Materials and Applications Zhejiang UniversityHangzhou 310027China

A flexible-grid 1×(2×3)mode-and wavelength-selective switch which comprises counter-tapered couplers and silicon microring resonators has been proposed,optimized,and demonstrated experimentally in this *** carefully thermally tuning phase shifters and silicon microring resonators,mode and wavelength signals can be independently and flexibly conveyed to any one of the output ports,and different bandwidths can be generated as *** particle swarm optimization algorithm and finite difference time-domain method are employed to optimize structural parameters of the twomode(de)multiplexer and crossing *** bandwidth-tunable wavelength-selective optical router composed of12 microring resonators is studied by taking advantage of the transfer matrix *** results show that,for the fabricated module,cross talk less than-10.18 dB,an extinction ratio larger than 17.41 d B,an in-band ripple lower than0.79 dB,and a 3-dB bandwidth changing from 0.38 to 1.05 nm are obtained,as the wavelength-channel spacing is 0.40 *** corresponding response time is measured to be 13.64μs.

关键词： integrated optics optical waveguide mode-and wavelength-selective switch

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Current-induced Néel order switching facilitated by magnetic phase transition

Current-induced Néel order switching facilitated by magneti...

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2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023

作者： Wu, Hao Zhang, Hantao Wang, Baomin Guo, Yaqin Cheng, Ran Wang, Kang L. Songshan Lake Materials Laboratory Dongguan523808 China University of California Department of Electrical and Computer Engineering Los AngelesCA90095 United States University of California Department of Electrical and Computer Engineering RiversideCA92521 United States Ningbo University School of Physical Science and Technology Ningbo315211 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Cas Key Laboratory of Magnetic Materials and Devices Ningbo315201 China

ISBN: (纸本)9798350338362

Antiferromagnetic materials (AFMs), which have zero-stray field and the THz-range magnetic resonance frequency, are promising candidates for the next-generation magnetic memory technology. Here, we report an electrical writing of antiferromagnetic orders through a record-low current density on the order of 106 A cm-2 facilitated by the unique AFM-ferromagnetic (FM) phase transition in FeRh. The spin-orbit torque can switch the AFM order parameter by 90° with a reduced writing current density by introducing a transient FM state via current-induced Joule heating. This work demonstrates the exciting possibility of writing operations in AFM-based devices with a lower current density, opening a new pathway toward pure AFM memory applications. © 2023 IEEE.

关键词： Magnetic resonance

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Designing Advanced Aqueous Zinc-Ion Batteries:Principles,Strategies,and Perspectives

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Energy & Environmental materials 2022年第3期5卷 823-851页

作者： Yan Li Zhouhao Wang Yi Cai Mei Er Pam Yingkui Yang Daohong Zhang Ye Wang Shaozhuan Huang Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education&Hubei Key Laboratory of Catalysis and Materials Science South-Central University for NationalitiesWuhan 430074China School of Materials Science and Engineering Nanyang Technological UniversitySingapore Singapore Department of Electrical&Computer Engineering National University of Singapore4 Engineering Drive 3Singapore 117583Singapore Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China

Aqueous zinc-ion batteries(AZIBs)are an appealing battery system due to their low cost,intrinsic safety,and environmental-friendliness,while their application is plagued by the obstacles from the cathode,electrolyte,and zinc *** the design principles and strategies toward the optimization of cathode,electrolyte,and zinc anode is crucial for the development of ***,we present a comprehensive analysis of the design principles and promising strategies toward the improvement of ***,the various reaction mechanisms are summarized and the existing issues associated with the cathode,electrolyte,and zinc anode are discussed to guide the rational design of ***,we provide an in-depth and comprehensive discussion on the design principles and strategies for the electrodes/electrolyte/separator optimization,and analyze the advantages and disadvantages of various ***,the design principles and strategies of the newly appeared conversion-type AZIBs,such as Zn-S battery and Zn-Se battery,are also discussed and *** effect of design strategies on the electrochemical performance and the relationship between the current issues and strategies are also unveiled in ***,some research trends and perspectives are provided for designing better AZIBs.

关键词： aqueous zinc-ion batteries cathode modification design principles electrolyte regulation zinc anode optimization

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Technical and economic feasibility assessment for hybrid energy system electricity and hydrogen generation: A case study

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Global Energy Interconnection 2025年第1期8卷 62-81页

作者： Paul C.Okonkwo Samuel Chukwujindu Nwokolo El Manaa Barhoumi Ibrahim B.Mansir Usman Habu Taura Barun Kumar Das Ahmed Bahgat Radwan Wilfred Emori Ephraim Bonah Agyekum Khalid Al Kaaf Mechanical&Mechatronics Engineering Department Dhofar UniversitySalalah 211the Sultanate of Oman Department of Physics Faculty of Physical SciencesUniversity of CalabarCalabar PMB 1115Nigeria Electrical&Computer Engineering Department Dhofar UniversitySalalah 211the Sultanate of Oman Department of Mechanical Engineering Prince Sattam bin Abdulaziz UniversityAl-Kharj 11942Saudi Arabia Centre for Energy Research and Training Ahmadu Bello UniversityPMB 1045ZariaNigeria Oil&Gas Research Center Sultan Qaboos UniversityMuscat 123the Sultanate of Oman Department of Mechanical Engineering Rajshahi University of Engineering&TechnologyRajshahi 6204Bangladesh Center for Advanced Materials Qatar UniversityDoha 2713Qatar School of Materials Science and Engineering Sichuan University of Science and EngineeringZigong 643000PR China Department of Nuclear and Renewable Energy Ural Federal University Named after the First President of Russia BorisEkaterinburg 620002Russia Western Caspian University Baku AZ1001Azerbaijan Department of Civil and Environmental Engineering Dhofar UniversitySalalah 211the Sultanate of Oman

Hydrogen is emerging as a promising alternative to fossil fuels in the transportation *** study evaluated the feasibility of estab-lishing hydrogen refueling stations in five cities in Oman,Duqm,Haima,Sur,Al Buraymi,and Salalah,using Hybrid Optimization of Multiple Electric Renewables(HOMER)*** hybrid energy systems,photovoltaic-wind turbine-battery,photovoltaic-battery,and wind turbine-battery were analyzed for each *** indicated that Duqm offers the lowest net present cost(NPC),levelized cost of energy,and levelized cost of hydrogen,making it the most cost-effective ***,Sensitivity analysis showed that as the life of electrolyzer increases during operation,the initial capital expenditure is distributed over a longer operational period,leading to a reduction in the *** so,renewable energy systems produced no emissions which supports Oman’s mission *** comprehensive analysis confirms the feasibility of establishing a hydrogen refueling station in Duqm,Oman,and highlights advanced optimization techniques’superior capability in designing cost-effective,sustainable energy systems.

关键词： Cities Economic indicator Hydrogen production Optimization Solar

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AD-band Traveling-Wave Amplifier by Embedding GaN HEMTs as Current Probes in a SiC SIW

AD-band Traveling-Wave Amplifier by Embedding GaN HEMTs as C...

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Microwave, MTT-S International Symposium

作者： Lei Li Tianze Li Patrick Fay James C. M. Hwang School of Electrical and Computer Engineering Cornell University USA Department of Materials Science and Engineering Cornell University USA Department of Electrical Engineering University of Notre Dame USA

ISBN: (数字)9798350375046

ISBN: (纸本)9798350375053

Conventional power combiners based on coplanar or microstrip transmission lines suffer from high loss at D band or higher frequencies. By contrast, power combiners based on substrate-integrated waveguides (SIWs) can have low loss, high power capacity, and minimum crosstalk. Recently, aD-band traveling-wave amplifier (TWA) was demonstrated by embedding transistors in the middle of an SIW as voltage probes to radiate power into the SIW. The voltage probes were realized through hot through-substrate vias (TSVs), which were not supported by all semiconductor foundries. As an alternative, this work embeds transistors along the sidewalls of an SIW as current probes through standard TSVs that are grounded to the backside metal layer. This approach combines twice as many transistors per unit length of the SIW without either hot TSVs or cross-SIW interconnects. This results in at least 5-dB-higher output power compared to the previously demonstrated TWA with voltage probes. The measured output power of the present TWA at 140 GHz is at least 19 dBm, limited by the available input power. The measured output power agrees with that simulated and simulation indicates an output power of 23 dBm under 1-dB gain compression. In this proof of concept, the demonstration is based on monolithic integration of unit-cell transistors and an SIW. In the future, larger transistors in a multi-stage amplifier can be used to drive each current probe for a TWA of higher gain, output power, and efficiency. The present concept of efficient power combining is equally applicable to heterogeneous integration and is material- and technology-agnostic. For example, transistors can be fabricated in a Si chiplet before integration with an SIW fabricated in a Si interposer.

关键词： Semiconductor device measurement Power measurement Power combiners Power amplifiers Transmission line measurements Silicon Transistors

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