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Synchronization of heart sounds with pulse from dorsalis pedis for S1 and S2 detection

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AIP Conference Proceedings 2020年第1期2231卷

作者： Aripriharta Muladi Ilham Ari Elbaith Zaeni I. Made Irawan Adim Firmansah Akhmad Afrizal Rizqi Gwo Jiun Horng 1Department of Electrical Engineering Faculty of Engineering Universitas Negeri Malang Jl. Semarang No. 5 Malang 65145 Indonesia 2Centre of Advanced Materials for Renewable Energy (CAMRY) Universitas Negeri Malang Jl. Semarang No. 5 Malang 65145 Indonesia 3Department of Computer Science and Information Engineering Southern Taiwan University of Science and Technology Tainan City Taiwan

A new S2 and S3 sound detection by using the heart rate signal taken from dorsalis pedis artery as a reference is presented in this paper. This approach aims to evaluate the accuracy of the S1 and S2 sounds detection by using dorsalis pedis pulse measurement as a reference. The dorsalis pedis pulse was measured by using MAX 30100 sensor controlled by a microcontroller. Meanwhile, the heart sounds were captured by using the ECG device. The measurement was taken for 5 minutes for a total of ten male and ten female subjects, with the age of 20 years old. This experiment has been conducted several times, and the average was calculated and compared to the existing solution. This proposed approach gives a small error compared to the standard S1 and S2 detection, leading it to be an acceptable and promising solution of a detection method.

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Development and Validation of a Finger Tremor Simulator

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Development and Validation of a Finger Tremor Simulator

IEEE Canadian Conference on electrical and computer engineering

作者： Yue Zhou Michael D. Naish Mary E. Jenkins Ana Luisa Trejos Biomedical Engineering Program Western University London ON Canada Department of Mechanical and Materials Engineering Western University London ON Canada Clinical Neurological Sciences Movement Disorders Program Western University London ON Canada Department of Electrical and Computer Engineering Western University London ON Canada

ISBN: (纸本)9781538624111

Tremor, being one of the most severe symptoms of Parkinson's disease, has been considered as not only a medical problem but also an engineering problem. Increasingly, wearable technologies are being considered as a viable treatment option. In order to study and control tremor in the field of engineering, the first step often includes modeling and simulation, as access to patients is limited. With the successful realization of a finger tremor simulator, a wearable tremor suppression device could be validated prior to testing on humans. In this study, a tremor simulator was designed and validated with recorded patient tremor data. Two experimental assessments were conducted on the validation of tremor motion reproduction and tremor torque reproduction. The results showed that the proposed simulator has 9%, 82%, and 141% error in the reproduction of the power of the 1st, 2nd and 3rd harmonics of the tremor, and 11.89% mean error on motion reproduction. The tremor torque measured at the index finger metacarpophalangeal joint is 0.02± 0.02 Nm, and the output torque from the tremor simulator is 0.03 ±0.01 Nm. Further parameter adjustment of the control system is required to improve performance.

关键词： Parkinson's disease Parkinsonian Tremor Tremor Simulator Tremor Hand Tremor

Roadmap on spin-wave computing

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arXiv 2021年

作者： Chumak, Andrii V. Kabos, P. Wu, M. Abert, C. Adelmann, C. Adeyeye, A. Åkerman, J. Aliev, F.G. Anane, A. Awad, A. Back, C.H. Barman, A. Bauer, G.E.W. Becherer, M. Beginin, E.N. Bittencourt, V.A.S.V. Blanter, Y.M. Bortolotti, P. Boventer, I. Bozhko, D.A. Bunyaev, S.A. Carmiggelt, J.J. Cheenikundil, R.R. Ciubotaru, F. Cotofana, S. Csaba, G. Dobrovolskiy, O.V. Dubs, C. Elyasi, M. Fripp, K.G. Fulara, H. Golovchanskiy, I.A. Gonzalez-Ballestero, C. Graczyk, P. Grundler, D. Gruszecki, P. Gubbiotti, G. Guslienko, K. Haldar, A. Hamdioui, S. Hertel, R. Hillebrands, B. Hioki, T. Houshang, A. Hu, C.-M. Huebl, H. Huth, M. Iacocca, E. Jungfleisch, M.B. Kakazei, G.N. Khitun, A. Khymyn, R. Kikkawa, T. Kläui, M. Klein, O. Klos, J.W. Knauer, S. Koraltan, S. Kostylev, M. Krawczyk, M. Krivorotov, I.N. Kruglyak, V.V. Lachance-Quirion, D. Ladak, S. Lebrun, R. Li, Y. Lindner, M. Macêdo, R. Mayr, S. Melkov, G.A. Mieszczak, S. Nakamura, Y. Nembach, H.T. Nikitin, A.A. Nikitov, S.A. Novosad, V. Otalora, J.A. Otani, Y. Papp, A. Pigeau, B. Pirro, P. Porod, W. Porrati, F. Qin, H. Rana, B. Reimann, T. Riente, F. Romero-Isart, O. Ross, A. Sadovnikov, A.V. Safin, A.R. Saitoh, E. Schmidt, G. Schultheiss, H. Schultheiss, K. Serga, A.A. Sharma, S. Shaw, J.M. Suess, D. Surzhenko, O. Szulc, K. Taniguchi, T. Urbánek, M. Usami, K. Ustinov, A.B. van der Sar, T. van Dijken, S. Vasyuchka, V.I. Verba, R. Viola Kusminskiy, S. Wang, Q. Weides, M. Weiler, M. Wintz, S. Wolski, S.P. Zhang, X. Faculty of Physics University of Vienna Boltzmanngasse 5 ViennaA-1090 Austria National Institute of Standards and Technology BoulderCO80305 United States Department of Physics Colorado State University Fort CollinsCO80523 United States Research Platform MMM Mathematics-Magnetism-Materials University of Vienna Oskar-Morgenstern-Platz 1 Vienna1090 Austria Imec Leuven3001 Belgium Department of Physics Durham University South Road DurhamDH1 3LE United Kingdom Department of Physics University of Gothenburg Gothenburg412 96 Sweden Universidad Autónoma de Madrid Madrid28049 Spain Unité Mixte de Physique CNRS Thales Université Paris Saclay Palaiseau91767 France Department of Physics Technical University of Munich Garching85748 Germany Department of Condensed Matter Physics and Material Sciences S N Bose National Centre for Basic Sciences Salt Lake Kolkata700106 India Advanced Institute for Materials Research Tohoku University Sendai980-8577 Japan Zernike Institute for Advanced Materials University of Groningen Netherlands Department of Electrical and Computer Engineering Technical University of Munich Munich80333 Germany Laboratory of Magnetic Metamaterials Saratov State University Saratov410012 Russia Max Planck Institute for the Science of Light Erlangen91058 Germany Department of Quantum Nanoscience Kavli Institute of Nanoscience Delft University of Technology Delft2628 CJ Netherlands Department of Physics and Energy Science University of Colorado Colorado Springs Colorado SpringsCO80918 United States Departamento de Física e Astronomia Universidade do Porto Porto4169-007 Portugal Institut de Physique et Chimie des Matériaux de Strasbourg CNRS Université de Strasbourg StrasbourgF-67000 France Department of Quantum and Computer Engineering Delft University of Technology Delft2628 CD Netherlands Faculty for Information Technology and Bionics Pazmany Peter Catholic University Prater u. 50/A BudapestH-1083 Hungary INNOVENT e.V.

Magnonics is a field of science that addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operations in the GHz-to-THz frequency range, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS are just a few of many advantages offered by magnons. Although magnonics is still primarily positioned in the academic domain, the scientific and technological challenges of the field are being extensively investigated, and many proof-of-concept prototypes have already been realized in laboratories. This roadmap is a product of the collective work of many authors that covers versatile spin-wave computing approaches, conceptual building blocks, and underlying physical phenomena. In particular, the roadmap discusses the computation operations with Boolean digital data, unconventional approaches like neuromorphic computing, and the progress towards magnon-based quantum computing. The article is organized as a collection of sub-sections grouped into seven large thematic sections. Each sub-section is prepared by one or a group of authors and concludes with a brief description of the current challenges and the outlook of the further development of the research directions. © 2021, CC BY.

关键词： Spin waves

Doubling the near-infrared photocurrent in a solar cell via omni-resonant coherent perfect absorption

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arXiv 2019年

作者： Villinger, Massimo L. Shiri, Abbas Shabahang, Soroush Jahromi, Ali K. Nasr, Magued B. Villinger, Christopher H. Abouraddy, Ayman F. CREOL College of Optics & Photonics University of Central Florida OrlandoFL32816 United States Department of Electrical and Computer Engineering University of Central Florida OrlandoFL32816 United States Wellman Center for Photomedicine Massachusetts General Hospital Harvard Medical School CambridgeMA02139 United States Department of Physics Boston University BostonMA02215 United States Department of Materials Science and Engineering University of Central Florida OrlandoFL32816 United States

Minimizing the material usage in thin-film solar cells can reduce manufacturing costs and enable mechanically flexible implementations, but concomitantly diminishes optical absorption. Coherent optical effects can help alleviate this inevitable drawback at discrete frequencies. For example, coherent perfect absorption guarantees that light is fully absorbed in a thin layer regardless of material or thickness – but only on resonance. Here we show that ‘omni-resonance’ delivers such coherent enhancement over a broad bandwidth by structuring the optical field to nullify the angular dispersion intrinsic to resonant structures. After embedding an amorphous-silicon thin-film photovoltaic cell in a planar cavity, pre-conditioning the incident light using an alignment-free optical arrangement severs the link between the resonant bandwidth and the cavity-photon lifetime, thereby rendering the cavity omni-resonant. Coherently enhanced near-infrared absorption doubles the photocurrent over the targeted spectral range 660–740 nm where every wavelength resonates. These results may pave the way to transparent solar cells that optimally harvest near-infrared light. Copyright © 2019, The Authors. All rights reserved.

关键词： Thin film solar cells

Photon Sieving: Selective and Sensitive Photon Sieve Based on III–V Semiconductor Nanowire Forest Fabricated by Lithography-Free Process (Advanced Optical materials 17/2020)

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Advanced Optical materials 2020年第17期8卷

作者： Gil Ju Lee Kwangwook Park Min Seok Kim Sehui Chang Tae Joon Seok Hong-Gyu Park Gunwu Ju Kyujung Kim Young Min Song School of Electrical Engineering and Computer Science (EECS) Gwangju Institute of Science and Technology (GIST) Gwangju 61005 Republic of Korea Division of Advanced Materials Engineering Jeonbuk National University Jeonju 54896 Republic of Korea Department of Physics Korea University Seoul 02841 Republic of Korea Technology Support Center Korea Institute of Science and Technology Seoul 02792 Republic of Korea Department of Cogno-Mechatronics Engineering Pusan National University (PNU) Busan 46241 Republic of Korea

Light-Based Analog Computing Using a Single Array of Polarizable Particles 12

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Light-Based Analog Computing Using a Single Array of Polariz...

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

作者： Rardi, Y. Alu, A. Department of Electrical and Computer Engineering University of Texas at Austin AustinTX78712 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

Light-based signal processing in the spatial domain enables parallel computation, resulting in faster operations in comparison to digital-based systems. We propose a basic platform to realize spatial differentiation and integration of the impinging wavefront using a basic array of electric/magnetic dipoles. We also leverage bianisotropic inclusions to realize odd operations on the impinging wavefront. Our results show that a single array of polarizable particles enables sufficient degrees of freedom to realize optical analog computing using metasurfaces. © 2018 IEEE.

关键词： Wavefronts

Lattice dynamics localization in low-angle twisted bilayer graphene

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arXiv 2020年

作者： Gadelha, Andreij C. Ohlberg, Douglas A.A. Rabelo, Cassiano Neto, Eliel G.S. Vasconcelos, Thiago L. Campos, João L. Lemos, Jessica S. Ornelas, Vinícius Miranda, Daniel Nadas, Rafael Santana, Fabiano C. Watanabe, Kenji Taniguchi, Takashi van Troeye, Benoit Lamparski, Michael Meunier, Vincent Nguyen, Viet-Hung Paszko, Dawid Charlier, Jean-Christophe Campos, Leonardo C. Cançado, Luiz G. Medeiros-Ribeiro, Gilberto Jorio, Ado Physics Department Electrical Engineering Graduate Program Computer Science Department Universidade Federal de Minas Gerais Belo HorizonteMG31270-901 Brazil Physics Institute Universidade Federal da Bahia Campus Universitário de Ondina Salvador - BA40170-115 Brazil Divisão de Metrologia de Materiais Inmetro Duque de Caxias RJ25250-020 Brazil 1-2-1 Sengen Tsukuba-cityIbaraki305-0047 Japan Physics Applied Physics and Astronomy Jonsson Rowland Science Center Room 1C25 110 8th Street TroyNY12180 United States Louvain-la-Neuve Belgium

A low twist angle between the two stacked crystal networks in bilayer graphene enables self-organized lattice reconstruction with the formation of a periodic domain. This superlattice modulates the vibrational and electronic structures, imposing new rules for electron-phonon coupling and the eventual observation of strong correlation and superconductivity. Direct optical images of the crystal superlattice in reconstructed twisted bilayer graphene are reported here, generated by the inelastic scattering of light in a nano-Raman spectroscope. The observation of the crystallographic structure with visible light is made possible due to lattice dynamics localization, the images resembling spectral variations caused by the presence of strain solitons and topological points. The results are rationalized by a nearly-free-phonon model and electronic calculations that highlight the relevance of solitons and topological points, particularly pronounced for structures with small twist angles. We anticipate our discovery to play a role in understanding Jahn-Teller effects and electronic Cooper pairing, among many other important phonon-related effects, and it may be useful for characterizing devices in the most prominent platform for the field of *** Codes 82D03 Copyright © 2020, The Authors. All rights reserved.

关键词： Electronic structure

Ambipolar perovskite light electrochemical cell for transparent display devices

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arXiv 2019年

作者： Ishteev, Arthur Haroldson, Ross Gets, Dmitry Tsapenko, Alexey P. Alahbakhshi, Masoud Moon, Jiyoung Martinez, Patricia Usupov, Khabib Nasibulin, Albert Makarov, Sergey Zakhidov, Anvar Laboratory of Advanced Solar Energy NUST MISiS Moscow Russia Department of Physics University of Texas at Dallas RichardsonTX United States Department of Nanophotonics and Metamaterials ITMO University St. Petersburg Moscow197101 Russia Skolkovo Institute of Science and Technology Nobel str. 3 Moscow Russia Department of Electrical and Computer Engineering University of Texas at Dallas RichardsonTX United States Department of Materials Science and Engineering University of Texas at Dallas RichardsonTX United States NanoTech Institute University of Texas at Dallas RichardsonTX United States Department of Engineering Sciences and Mathematics Luleå University of Technology Luleå Sweden

In summary, we reported an ambipolar planar transparent perovskite LEC for the first time. Easy-to-do single layer inorganic perovskite light emitting electrochemical cell was optimized by vacuum treatment prior crystallization processed. Perovskite crystals imbedded polyelectrolyte matrix covered with transparent top carbon electrode deposited by dry lamination. Voltage induced reversable polarizing cycle tuned the device from p-i-n to n-i-p structure in-situ under electrical field. The combination of transparent, ionically doped carbon electrodes and polarization induced p-i-n formation allows electroluminescence in forward and reverse bias (ambipolar mode). Multicolor pixel was assembled in stack configuration based on semitransparent perovskite described LEC. The combination of green and red subcells perform yellow emission. This concept demonstrates potential of perovskite LEC to advanced application in display devices. These features allow the possible fabrication of emissive multicolor micro-LED pixels in a stack configuration without a backlight. Stacked pixel designs have potential application in head-up displays (HUD) and augmented reality (AR) devices, due to smaller pixel area compared to conventional display with active matrix. Copyright © 2019, The Authors. All rights reserved.

关键词： Perovskite

Metagratings for Efficient Wavefront Manipulation 12

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Metagratings for Efficient Wavefront Manipulation

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

ISBN: (纸本)9781538647028

Metagratings are two-dimensional periodic arrays of individual scatterers that enable highly-efficient extreme wave transformation which was impossible using conventional metasurfaces. We review our recent progress in this area and, notably, discuss metagrating designs based on asymmetric electric dipoles that are practically easier to realize compared to bianisotropic inclusions. In addition, we present the design of a tunable metagrating based on graphene strips. It will be shown that the proposed structure can provide multiple functionalities by tuning just two bias voltages. The efficiency of the proposed design is only limited by dissipation in graphene. © 2018 IEEE.

关键词： Graphene