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2018 Workshop on Multidisciplinary and Its Applications: Applied Mathematics, computer science, Information Systems, and Information Technology, WMA-Mathcomtech 2018

作者： Ginting, Tinus Manurung, Hotler Harahap, Astro Julida Ongko, Erianto Hartono, H. Abdullah, Dahlan Erliana, Cut Ita Saddhono, Kundharu Sriadhi, S. Supriyono, S. Iskandar, Akbar Saleh, A.A. Sudarsana, I. Ketut Department of Mechanical Engineering Akademi Teknologi Industri Immanuel Indonesia Department of Informatics Akademi Teknologi Industri Immanuel Indonesia Department of Computer Science STMIK IBBI Medan Indonesia Department of Informatics Universitas Malikussaleh Aceh Indonesia Department of Industrial Engineering Universitas Malikussaleh Aceh Indonesia Graduate Program Universitas Sebelas Maret Surakarta Indonesia Department of Electrical Engineering Universitas Negeri Medan Indonesia Department of Geography Education Universitas Prof Dr Hazairin SH Bengkulu Indonesia Department of Informatics STMIK AKBA Makassar Indonesia Statistics Financial and Social Sciences Research Group Indonesia Department of Religious Education Institut Hindu Dharma Negeri Denpasar Denpasar Indonesia

Based on the formulation of the problem to be discussed by the writer is to know: the influence of 0.4 mm spark gap variation, and standard spark plug type, to CO and HC, the influence of 0.5 mm spark plug gap variation, and variation of platinum spark plug on CO and HC, influence of spark gap variation 0,6mm, and variation of iridium spark plug type to CO and HC emission Method used to obtain data needed to support the writer that is research method with experiment, literature study method or literature study The result of this research concludes that there is spark gap influence 0.4 mm, with variations of standard plug, platinum and iridium spark plugs against CO and HC emissions, where the lowest CO value is 0.27% and HC 98 ppm, 0.5 mm spark plug with lowest CO 0.15% and HC 46 ppm, 0.6 mm spark plug gap the lowest CO value of 0.19% and HC 24 ppm. The results of this research will be disseminated using the website. © Published under licence by IOP Publishing Ltd.

关键词： Information systems

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A testbed of intelligent sun tracking system and thermoelectric generator with Fresnel lens at solar cell system for maximizing generated energy

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Journal of Physics: Conference Series 2020年第1期1595卷

作者： M Muladi M F A Jalil A Aripriharta I Fadlika S Hidayat S Sendari A N A Afandi G J Horng W M Utomo Department of Electrical Engineering Faculty of Engineering Universitas Negeri Malang Jl. Semarang No. 5 Malang 65145 Indonesia Center for Advanced Materials and Renewable Energy (CAMRY) Universitas Negeri Malang Jl. Semarang No. 5 Malang 65145 Indonesia Department of Physics Faculty of Mathematics and Natural Science Universitas Negeri Malang Jl. Semarang No. 5 Malang 65145 Indonesia Department of Computer Science and Information Engineering Southern Taiwan University of Science and Technology Tainan City Taiwan Fakulti Kejuruteraan Elektrik dan Elektronik Universiti Tun Hussein Onn Malaysia

Solar or photovoltaic cells are one of the most potent renewable technologies to be applied in Indonesia that have a relatively high average daily solar radiation rate of 4.5 kWh/m2/day. In conventional applications, solar cells still have some weaknesses, especially on the efficiency of output that only reaches in the range of 5—16%. In this paper, optimizing the production of electrical energy in conventional solar cell system is carried out by modifying the system construction and controller. Intelligent Mobile Thermophotovoltaic (IMT) is a modified solar cell system that combines utilization of two sources of solar energy that are photon and thermal energy to convert into electrical energy. The sollar panel is intelligently controlled to maximized the received sunlight in solar cell. Fresnel lens is utilized for supporting the thermal energy collection of sunlight on the solar cell. The total energy produced by IMT is energy from Fresnel solar tracking concentrator plus the energy from thermoelectric heat collector and subtracted by energy which used for tracking system of about 2 Wh. The IMT can yield the electrical power of 91.815 Wh while the conventional solar cell system brought 55.15 Wh for 8 operation hours. This result showed that IMT can raise 66.46% the electrical energy production of conventional solar cell system.

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Exploring a potential energy surface by machine learning for characterizing atomic transport

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Physical Review B 2018年第12期97卷 125124-125124页

作者： Kenta Kanamori Kazuaki Toyoura Junya Honda Kazuki Hattori Atsuto Seko Masayuki Karasuyama Kazuki Shitara Motoki Shiga Akihide Kuwabara Ichiro Takeuchi Department of Computer Science Nagoya Institute of Technology Nagoya 466-8555 Japan Department of Materials Science and Engineering Kyoto University Kyoto 606-8501 Japan Department of Complexity Science and Engineering The University of Tokyo Chiba 277-8561 Japan RIKEN Center for Advanced Intelligence Project Tokyo 103-0027 Japan Center for Elements Strategy Initiative for Structure Materials (ESISM) Kyoto University Kyoto 606-8501 Japan JST PRESTO Kawaguchi 332-0012 Japan Center for Materials Research by Information Integration National Institute for Materials Science Tsukuba 305-0047 Japan Nanostructures Research Laboratory Japan Fine Ceramics Center Nagoya 456-8587 Japan Department of Electrical Electronic and Computer Engineering Gifu University Gifu 501-1193 Japan

We propose a machine-learning method for evaluating the potential barrier governing atomic transport based on the preferential selection of dominant points for atomic transport. The proposed method generates numerous random samples of the entire potential energy surface (PES) from a probabilistic Gaussian process model of the PES, which enables defining the likelihood of the dominant points. The robustness and efficiency of the method are demonstrated on a dozen model cases for proton diffusion in oxides, in comparison with a conventional nudge elastic band method.

关键词： Diffusion Potential energy surfaces Ab initio calculations First-principles calculations Machine learning

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Correction to: Mechanical activation of TiO2/Fe2O3 nanocomposite for arsenic adsorption: effect of ball-to-powder ratio and milling time

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Journal of Nanostructure in Chemistry 2021年第4期11卷 633-633页

作者： Babudurai, Mercyrani Nwakanma, Onyekachi Romero-Nuñez, Araceli Manisekaran, Ravichandran Subramaniam, Velumani Castaneda, Homero Jantrania, Anish Nanoscience and Nanotechnology Program Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN) Ciudad de México Mexico Department of Electrical Engineering (SEES) Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN) Ciudad de México Mexico Laboratorio de Investigación Interdisciplinaria Área de Nanoestructuras y Biomateriales Escuela Nacional de Estudios Superiores Unidad León Universidad Nacional Autónoma de México León Mexico Department of Materials Science and Engineering Texas A&M University College Station USA Department of Biological and Agricultural Engineering Agrilife Extension Texas A&M University College Station USA

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Modeling and thermal metrology of thermally isolated MEMS electrothermal actuators for strain engineering of 2D materials

arXiv

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arXiv 2018年

作者： Vutukuru, Mounika Christopher, Jason W. Pollock, Corey Bishop, David J. Swan, Anna K. Department of Electrical and Computer Engineering Boston University BostonMA02215 United States Department of Physics Boston University BostonMA02215 United States Division of Materials Science and Engineering Boston University BostonMA02215 United States Department of Electrical and Computer Engineering Boston University BostonMA02215 United States Department of Physics Boston University BostonMA02215 United States

We present electrothermal microelectromechanical (MEMS) actuators as a practical platform for straining 2D materials. The advantages of the electrothermal actuator is its high output force and displacement for low input voltage, but its drawback is that it is actuated by generating high amounts of heat. It is crucial to mitigate the high temperatures generated during actuation for reliable 2D material strain device implementation. Here, we implement a chevron actuator design that incorporates a thermal isolation stage in order to avoid heating the 2D material from the high temperatures generated during the actuation. By comparing experiment and simulation, we ensure our design does not compromise output force and displacement, while keeping the 2D material strain device stage cool. We also provide a simple analytical model useful for quickly evaluating different thermal isolation stage designs . Copyright © 2018, The Authors. All rights reserved.

关键词： Finite element method

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Immunity to scaling in MoS2transistors using edge contacts

arXiv

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arXiv 2018年

作者： Cheng, Zhihui Price, Katherine Singh, Shreya Noyce, Steven Lin, Yuh-Chen Yu, Yifei Cao, Linyou Franklin, Aaron D. Department of Electrical and Computer Engineering Duke University DurhamNC27708 United States Department of Materials Science and Engineering North Carolina State University RaleighNC27695 United States Department of Chemistry Duke University DurhamNC27708 United States

Atomically thin two-dimensional (2D) materials are promising candidates for sub-10 nm transistor channels due to their ultrathin body thickness, which results in strong electrostatic gate control. Properly scaling a transistor technology requires reducing both the channel length (distance from source to drain) and the contact length (distance that source and drain interface with semiconducting channel). Contact length scaling remains an unresolved epidemic for transistor scaling, affecting devices from all semiconductors - silicon to 2D materials. Here, we show that clean edge contacts to 2D MoS2provide immunity to the contact-scaling problem, with performance that is independent of contact length down to the 20 nm regime. Using a directional ion beam, in situ edge contacts of various metal-MoS2interfaces are studied. Characterization of the intricate edge interface using cross-sectional electron microscopy reveals distinct morphological effects on the MoS2depending on its thickness - from monolayer to few-layer films. Chromium is found to outperform other metals in the edge contact scheme, which is attributed to the shorter Cr-MoS2bond length. Compared to scaled top contacts with 20 nm contact length, in situ edge contacts yield better performance with an effective contact length of ∼ 1 nm and 18 times higher carrier injection efficiency. The in situ edge contacts also exhibit ∼8 times higher performance compared to the best-reported edge contacts. Our work provides experimental evidence for a solution to contact scaling in transistors, using 2D materials with clean edge contact interfaces, opening a new way of designing devices with 2D materials. Copyright © 2018, The Authors. All rights reserved.

关键词： Monolayers

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electrical-current-induced magnetic hysteresis in self-assembled vertically aligned La2/3Sr1/3MnO3:ZnO nanopillar composites

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Physical Review materials 2018年第2期2卷 021401(R)-021401(R)页

作者： W. Pan P. Lu J. F. Ihlefeld S. R. Lee E. S. Choi Y. Jiang Q. X. Jia Sandia National Laboratories Albuquerque New Mexico 87185 USA Department of Materials Science and Engineering University of Virginia Charlottesville Virginia 22904 USA Department of Electrical and Computer Engineering University of Virginia Charlottesville Virginia 22904 USA National High Magnetic Field Laboratory Tallahassee Florida 32310 USA Department of Materials Design and Innovation University at Buffalo - The State University of New York Buffalo New York 14260 USA Department of Physics Konkuk University Seoul 05029 Korea

Magnetoresistive random-access memory (MRAM) is poised to become a next-generation information storage device. Yet, many materials challenges remain unsolved before it can become a widely used memory storage solution. Among them, an urgent need is to identify a material system that is suitable for downscaling and is compatible with low-power logic applications. Self-assembled, vertically aligned La2/3Sr1/3MnO3:ZnO nanocomposites, in which La2/3Sr1/3MnO3 (LSMO) matrix and ZnO nanopillars form an intertwined structure with coincident-site-matched growth occurring between the LSMO and ZnO vertical interfaces, may offer new MRAM applications by combining their superior electric, magnetic (B), and optical properties. In this Rapid Communication, we show the results of electrical current induced magnetic hysteresis in magnetoresistance measurements in these nanopillar composites. We observe that when the current level is low, for example, 1 µA, the magnetoresistance displays a linear, negative, nonhysteretic B field dependence. Surprisingly, when a large current is used, I > 10 µA, a hysteretic behavior is observed when the B field is swept in the up and down directions. This hysteresis weakens as the sample temperature is increased. A possible spin-valve mechanism related to this electrical current induced magnetic hysteresis is proposed and discussed.

关键词： Charge electrical conductivity Ferromagnetism

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Computational investigation of inverse Heusler compounds for spintronics applications

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Physical Review B 2018年第9期98卷 094410-094410页

作者： Jianhua Ma Jiangang He Dipanjan Mazumdar Kamaram Munira Sahar Keshavarz Tim Lovorn C. Wolverton Avik W. Ghosh William H. Butler Department of Electrical and Computer Engineering University of Virginia Charlottesville Virginia 22904 USA Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA Department of Physics Southern Illinois University Carbondale Illinois 62901 USA Center for Materials for Information Technology University of Alabama Tuscaloosa Alabama 35401 USA Department of Physics and Astronomy University of Alabama Tuscaloosa Alabama 35401 USA

First-principles calculations of the electronic structure, magnetism, and structural stability of inverse Heusler compounds with the chemical formula X2YZ are presented and discussed with a goal of identifying compounds of interest for spintronics. Compounds for which the number of electrons per atom for Y exceed that for X and for which X and Y are each one of the 3d elements, Sc-Zn, and Z is one of the group IIIA-VA elements: Al, Ga, In, Si, Ge, Sn, P, As, or Sb were considered. The formation energy per atom of each compound was calculated. By comparing our calculated formation energies to those calculated for phases in the inorganic crystal structure database of observed phases, we estimate that inverse Heuslers with formation energies within 0.052 eV/atom of the calculated convex hull are reasonably likely to be synthesizable in equilibrium. The observed trends in the formation energy and relative structural stability as the X, Y, and Z elements vary are described. In addition to the Slater-Pauling gap after 12 states per formula unit in one of the spin channels, inverse Heusler phases often have gaps after 9 states or 14 states. We describe the origin and occurrence of these gaps. We identify 14 inverse Heusler semiconductors, 51 half-metals, and 50 near-half-metals with negative formation energy. In addition, our calculations predict 4 half-metals and 6 near-half-metals to lie close to the respective convex hull of stable phases, and thus may be experimentally realized under suitable synthesis conditions, resulting in potential candidates for future spintronics applications.

关键词： Magnetism Spin polarization Spintronics Half-metals Heusler alloy

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Nonlinear Isolators and Circulators Based on Networks of Coupled Resonators 12

Nonlinear Isolators and Circulators Based on Networks of Cou...

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12th International Congress on Artificial materials for Novel Wave Phenomena, METAmaterials 2018

作者： Sounas, D.L. Soric, J. Draguanno, G. Alu, A. University of Texas at Austin Department of Electrical and Computer Engineering AustinTX78712 United States Raytheon AndoverMA United States Johns Hopkins University Applied Physics Laboratory LaurelMD United States Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Physics Program Graduate Center City University of New York New YorkNY10016 United States Department of Electrical Engineering City College of New York New YorkNY10031 United States

ISBN: (纸本)9781538647028

We present our recent results in the area of nonlinear nonreciprocal devices, including isolators and circulators. We show that the nonlinear isolators based on single Fano resonators are subject to a fundamental trade-off between transmission and isolation intensity range or bandwidth, stemming from time reversal symmetry. We also show how we can overcome this limitation by using multiple nonlinear resonators. Finally, we show that networks with many nonlinear resonators can also be used to realize more advanced devices, such as circulators. © 2018 IEEE.

关键词： Resonators

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Abstracts

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JOURNAL OF SPINAL CORD MEDICINE 2021年第SUPPL 1期44卷 S278-S324页

作者： [Anonymous] Department of Medicine Division of Physical Medicine and Rehabilitation University of Toronto Toronto ON CA KITE - Toronto Rehabilitation Institute University Health Network Toronto ON CA Institute for Health Policy Management and Evaluation University of Toronto Toronto ON CA Rehabilitation Sciences Institute University of Toronto Toronto ON CA Institute of Medical Sciences University of Toronto Toronto ON CA. Rehabilitation Sciences Institute University of Toronto ON CA KITE Research Institute-Toronto Rehab-University Health Network Toronto ON CA Physical Therapy Department University of Toronto ON CA Praxis Spinal Cord Institute Vancouver BC Université de Montréal (École de réadaptation) Montreal QC CA Institut de réadaptation Gingras-Linsay-de-Montréal Montreal QC CA Division of Physical Medicine & Rehabilitation Department of Medicine Faculty of Medicine & Dentistry University of Alberta Edmonton AB CA University of Calgary Calgary AB CA Alberta Health Services Centre for Family Medicine Kitchener ON CA McMaster University Department of Family Medicine Hamilton ON CA Dept. of Physical Therapy University of Toronto Toronto ON CA KITE-University Health Network Toronto ON CA Praxis Spinal Cord Institute Vancouver BC CA Center for Interdisciplinary Research in Rehabilitation and Social Integration (CIRRIS) Quebec City QC CA Dept. of Rehabilitation Laval University Quebec City QC CA Institute of Health Policy Management and Evaluation University of Toronto Toronto ON CA School of Rehabilitation Science University of Saskatchewan Saskatoon SK CA Ontario Neurotrauma Foundation Toronto ON CA Canadian Spinal Research Organization Toronto ON CA CIUSSS du Centre-Sud-de-l ‘Île-de-Montréal (Installation Gingras-Lindsay) Montréal QC CA École de réadaptation Université de Montréal Montréal QC CA First Steps Wellness Centre Regina SK CA Stan Cassidy Centre for Rehabilitation Horizon Health Network Fredericton NB CA Departmen

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