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4th International Doctoral Symposium on Applied Computation and Security Systems, ACSS 2017

作者： Venkatesh Akshay, A.L. Kushal, P. Venugopal, K.R. Patnaik, L.M. Iyengar, S.S. Department of Computer Science and Engineering University Visvesvaraya College of Engineering Bangalore University Bengaluru560001 India National Institute of Advanced Studies Bengaluru560012 India Florida International University MiamiFL United States

ISBN: (纸本)9789811081828

Existing work Geographic opportunistic routing (GOR) selects a forwarding sensor node to progress data packets on the basis of geographic distance. Similarly, the multipath routing uses multiple paths to achieve both reliability and delay. However, geographic opportunistic routing results in lower packet delivery rate and high latency. The multipath routing introduces channel contention, interference, and quick depletion of energy of the sensor node in an asymmetric link wireless environment. The existing work Efficient QoS-aware Geographic Opportunistic Routing (EQGOR) elects and prioritize the forwarding nodes to achieve different QoS parameters. However, in EQGOR, the count of forwarding nodes increases with the increase in the required reliability. To improve energy efficiency, delay, and successful ratio of packet delivery in WSNs, we propose a Two-Hop Geographic Opportunistic Routing (THGOR) protocol that selects a subset of 2-hop neighbors of node which has high packet reception ratio and residual energy at the next forwarder node, and the selected 1-hop neighbors of node has supreme coverage of 2-hop neighbors as relay nodes. THGOR is comprehensively evaluated through ns-2 simulator and compared with existing protocols EQGOR and GOR. Simulation results show that THGOR significant improvement in packet advancement, delay, reliable transmission, and energy efficient. © 2018, Springer Nature Singapore Pte Ltd.

关键词： Sensor nodes

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A Gd@C82-based single molecular electret device

arXiv

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arXiv 2020年

作者： Zhang, Kangkang Wang, Cong Zhang, Minhao Bai, Zhanbin Xie, Fangfang Tan, Yuanzhi Guo, Yilv Hu, Kuo-Juei Cao, Lu Zhang, Shuai Tu, Xuecou Kang, Lin Chen, Jian Wu, Peiheng Wang, Xuefeng Wang, Jinlan Liu, Junming Wang, Baigeng Wang, Guanghou Xie, Suyuan Ji, Wei Shi, Su-Fei Reed, M.A. Song, Fengqi National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures School of Physics Nanjing University Nanjing210093 China Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices Department of Physics Renmin University of China Beijing100872 China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China School of Physics Southeast University Nanjing211189 China School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210023 China Department of Chemical and Biological Engineering Rensselaer Polytechnic Institute TroyNY12180 United States Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute TroyNY12180 United States Departments of Applied Physics and Electrical Engineering Yale University New HavenCT06520 United States Nanjing211805 China

Single molecular electrets exhibiting single‐molecule electric polarization switching have been long desired as a platform for extremely small non-volatile storage devices, although it is controversial because of the poor stability of single molecular electric dipoles. Here we study the single molecular device of Gd@C82, where the encapsulated Gd atom forms a charge center, and we have observed a gate-controlled switching behavior between two sets of single-electron-transport stability diagrams. The switching is operated in a hysteresis loop with a coercive gate field of around 0.5 V/nm. Theoretical calculations have assigned the two conductance diagrams to corresponding energy levels of two states that the Gd atom is trapped at two different sites of the C82 cage, which possess two different permanent electrical dipole orientations. The two dipole states are stabilized by the anisotropic energy and separated by a transition energy barrier of 70 meV. Such switching is then accessed to the electric field driven reorientation of individual dipole while overcoming the barriers by the coercive gate field, and demonstrates the creation of a single molecular electret. Copyright © 2020, The Authors. All rights reserved.

关键词： Switching

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Predictive Inverse Kinematics: optimizing Future Trajectory through Implicit Time Integration and Future Jacobian Estimation

Predictive Inverse Kinematics: optimizing Future Trajectory ...

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2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Ko Ayusawa Wael Suleiman Eiichi Yoshida CNRS-AIST JRL (Joint Robotics Laboratory) UMI13218/RL Intelligent Systems Research Institute National Institute of Advanced Industrial Science and Technology (IS-AIST) Japan Electrical and Computer Engineering Department Faculty of Engineering University of Sherbrooke Canada

This paper presents an inverse kinematics (IK) method which can control future velocities and accelerations for multi-body systems. The proposed IK method is formulated as a quadratic programing (QP) that optimizes future joint trajectories. The features of the proposed IK are: (1) the evaluation of accelerations at future time instances, (2) the trajectory representation that can implicitly integrate the time integral formula into QP, (3) the computation of future Jacobian matrices based on the comprehensive theory of differential kinematics proposed in our previous work. Those features enable a stable and fast IK computation while evaluating the future accelerations. We also conducted thorough numerical studies to show the efficiency of the proposed method.

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Tunable plasmonic ultrastrong coupling: Emulating dicke physics at room temperature

arXiv

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arXiv 2021年

作者： Yahiaoui, Riad Chase, Zizwe A. Kyaw, Chan Tay, Fuyang Baydin, Andrey Noe, G. Timothy Song, Junyeob Kono, Junichiro Agrawal, Amit Bamba, Motoaki Searles, Thomas A. Department of Physics and Astronomy Howard University WashingtonDC20059 United States Department of Electrical and Computer Engineering Rice University HoustonTX70005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Smalley-Curl Institute Rice University HoustonTX77005 United States Physical Measurement Laboratory National Institute of Standards and Technology GaithersburgMD20899 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Maryland NanoCenter University of Maryland College ParkMD20742 United States The Hakubi Center for Advanced Research Kyoto University Kyoto606-8502 Japan Department of Physics I Kyoto University Kyoto606-8502 Japan Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States

A system of N two-level atoms cooperatively interacting with a photonic field can be described as a single giant atom coupled to the field with interaction strength ∝ √N. This enhancement, known as Dicke cooperativity in quantum optics, has recently become an indispensable element in quantum information technology based on strong light-matter coupling. Here, we extend the coupling beyond the standard light-matter interaction paradigm, emulating Dicke cooperativity in a terahertz metasurface with N meta-atoms. Cooperative enhancement manifested in the form of matter-matter coupling, through the hybridization of localized surface plasmon resonance in individual meta-atoms and surface lattice resonance due to the periodic array of the meta-atoms. By varying the lattice constant of the array, we observe a clear anticrossing behavior, a signature of strong coupling. Furthermore, through engineering of the capacitive split-gap in the meta-atoms, the coupling rate was cooperatively enhanced into the ultrastrong coupling regime by a factor of √N. This room-temperature technology serves as a convenient quantum emulator of the dynamics of a qubit with a giant dipole moment coherently driven by a single bosonic field. Copyright © 2021, The Authors. All rights reserved.

关键词： Atoms

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Core losses of a nanocrystalline motor under inverter and sinusoidal excitations

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Journal of the Magnetics Society of Japan 2019年第3期43卷 42-45页

作者： Yao, A. Sugimoto, T. Fujisaki, K. Department of Electrical and Computer Engineering Toyama Prefectural University 5180 Kurokawa Imizu939-0398 Japan Department of Advanced Science and Technology Toyota Technological Institute 2-12-1 Hisakata Tenpaku-ku Nagoya468-8511 Japan

In this paper, we focus on an evaluation of core losses in permanent magnet synchronous motors (PMSMs) made of nanocrystalline magnetic materials under inverter and sinusoidal excitations. To discuss the core loss properties of a nanocrystalline motor, comparison with PMSMs made of amorphous magnetic materials and non-oriented (NO) silicon steel sheets is also performed. Under sinusoidal excitation, the core losses of the nanocrystalline motor were about 0.7 and 0.5 times smaller than those of the amorphous and NO motors, respectively. In particular, we found that the nanocrystalline motor reduced the core loss on the basis of time harmonic components in comparison with not only the NO motor but also the amorphous motor. On the basis of our results, the nanocrystalline motor is expected to be suitable for use in high-speed and high-frequency regions. © 2019, Magnetics Society of Japan. All rights reserved.

关键词： Permanent magnets

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Trust framework for online products and services using grain level comparison: A solution to boot-strapping problem

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IOP Conference Series: Materials science and engineering 2020年第1期993卷

作者： M N Talib M Akhtar NZ Jhanjhi G. Suseendran Papua New Guinea University of Technology Lae PNG Department of Computer Science & Engineering Taylor's University Malaysia Department of Information Technology Vels Institute of Science Technologyand Advanced Studies Chennai India

Service-oriented architecture has changed the way that web applications are designed. Today users are more inclined towards online products and services to save time, energy, and cost. However existing frameworks for online purchasing have certain drawbacks and one of the foremost is 'trust'. Hence the struggle is to build such a system trust that offers commendations to the customer for the products and services even with inadequate resources; consequently building customer's trust upon the vender as well as the system. Current systems available only utilize trust by providing product features and comparison using the rating system. However, a problem occurs when a 'Bootstrapping issue' is raised, i.e., if a new company emerges in the market then the existing system cannot generate a trust rating for it; the same goes for the new product. Such a problem can cause an uncertain situation for the customer to; a) whether go for the existing product or b) the new product of a new company. In this article, we propose a system trust using a novel framework, which can solve the problem of bootstrapping using a 'grain level approach'. By providing a high level of granularity, the details of the product's specs and features will be much in-depth, which will offer the customer an enhanced platform to examine and compare the product amongst several other similar products and ultimately coming to a decision to purchase it by trusting it. As a result, the decision-making power of the customers will be strengthened and the system's trust will be extended.

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Morphological-based microcalcification detection using adaptive thresholding and structural similarity indices

Morphological-based microcalcification detection using adapt...

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International Conference on advanced Technologies for Signal and Image Processing (ATSIP)

作者： Asma Touil Karim Kalti Pierre-Henri Conze Basel Solaiman Mohamed Ali Mahjoub Higher Institute of Computer Science and Communication Technology (IsitCom) University of Sousse Hammam Sousse Tunisia ITI Department IMT Atlantique Brest France LATIS-Laboratory of Advanced Technology and Intelligent Systems Sousse Tunisia IMT Atlantique LaTIM UMR 1101 UBL Brest France University of Sousse Sousse Tunisia Inserm UMR 1101 Brest France National Engineering School of Sousse University of Sousse Sousse Tunisia

ISBN: (数字)9781728175133

ISBN: (纸本)9781728175140

In this paper, we propose a new morphological-based method for automatic detection of microcalcifications in digitized mammograms. It uses various structuring elements to deal with the diversity of microcalcification characteristics. The obtained morphological maps are converted to a continuous suspicion map (SM) based on the structural similarity index (SSIM). This new semantic representation map is then locally analyzed, using superpixels, to automatically estimate adaptive threshold values and finally identify potential microcalcification areas. The proposed method was evaluated using the publicly-available INBreast database. Experimental results show the benefits gained in terms of improving microcalcification detection performances compared to some state-of-the-art methods.

关键词： Mammography Shape Indexes Morphology Morphological operations Breast cancer Gray-scale

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Three-mask elevated-metal metal-oxide thin-film transistor technology for high-resolution AMOLED application

Three-mask elevated-metal metal-oxide thin-film transistor t...

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SID Symposium, Seminar, and Exhibition 2018, Display Week 2018

作者： Li, Jiapeng Lu, Lei Xia, Zhihe Wang, Sisi Feng, Zhuoqun Kwok, Hoi-Sing Wong, Man State Key Laboratory on Advanced Displays and Optoelectronics and Technologies Department of Electronic and Computer Engineering HKUST Hong Kong Jockey Club Institute for Advanced Study Kowloon Hong Kong The Hong Kong University of Science and Technology Kowloon Hong Kong

ISBN: (纸本)9781510867659

Incorporated with the self-aligned definition of the active island, a one-mask-reduced elevated-metal metal-oxide (EMMO) thin-film transistor (TFT) with thermally-induced source/drain regions was proposed for high-resolution AMOLED application. Such three-mask EMMO TFT combines the advantages of small device footprint, low manufacture cost, reduced overlap parasitic capacitance and good device characteristics. © 2018, Blackwell Publishing Ltd. All rights reserved.

关键词： Thin film transistors

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swTVM: Towards Optimized Tensor Code Generation for Deep Learning on Sunway Many-Core Processor

arXiv

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arXiv 2019年

作者： Li, Mingzhen Liu, Changxi Liao, Jianjin Zheng, Xuegui Yang, Hailong Sun, Rujun Xu, Jun Gan, Lin Yang, Guangwen Luan, Zhongzhi Qian, Depei School of Computer Science and Engineering Beihang University Beijing China State Key Laboratory of Software Development Environment Beijing China National University of Singapore Singapore Singapore State Key Laboratory of Mathematical Engineering and Advanced Computing Wuxi China Science and Technology on Special System Simulation Laboratory Beijing Simulation Center Beijing China Department of Computer Science and Technology Tsinghua University Beijing China

The flourish of deep learning frameworks and hardware platforms has been demanding an efficient compiler that can shield the diversity in both software and hardware in order to provide application portability. Among the existing deep learning compilers, TVM is well known for its efficiency in code generation and optimization across diverse hardware devices. In the meanwhile, the Sunway many-core processor renders itself as a competitive candidate for its attractive computational power in both scientific computing and deep learning workloads. This paper combines the trends in these two directions. Specifically, we propose swTVM that extends the original TVM to support ahead-of-time compilation for architecture requiring cross-compilation such as Sunway. In addition, we leverage the architecture features during the compilation such as core group for massive parallelism, DMA for high bandwidth memory transfer and local device memory for data locality, in order to generate efficient codes for deep learning workloads on Sunway. The experiment results show that the codes generated by swTVM achieves 1.79× on average compared to the state-of-the-art deep learning framework on Sunway, across six representative benchmarks. This work is the first attempt from the compiler perspective to bridge the gap of deep learning and Sunway processor particularly with productivity and efficiency in mind. We believe this work will encourage more people to embrace the power of deep learning and Sunway many-core processor. Copyright © 2019, The Authors. All rights reserved.

关键词： Program compilers

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Imaging Topological Spin Structures Using Light-Polarization and Magnetic Microscopy

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Physical Review Applied 2021年第2期15卷 024040-024040页

作者： Till Lenz Georgios Chatzidrosos Zhiyuan Wang Lykourgos Bougas Yannick Dumeige Arne Wickenbrock Nico Kerber Jakub Zázvorka Fabian Kammerbauer Mathias Kläui Zeeshawn Kazi Kai-Mei C. Fu Kohei M. Itoh Hideyuki Watanabe Dmitry Budker Helmholtz Institut Mainz Johannes Gutenberg-Universität Mainz Mainz 55128 Germany Institut für Physik Johannes Gutenberg-Universität Mainz Mainz 55128 Germany Université de Rennes CNRS Institut FOTON UMR 6082 Lannion F-22305 France Institute of Physics Faculty of Mathematics and Physics Charles University Prague 121 16 Czech Republic Physics Department University of Washington Seattle Washington 98105 USA Electrical and Computer Engineering Department University of Washington Seattle Washington 98105 USA Helmholtz Institut Mainz Johannes Gutenberg University Mainz 55128 Germany Spintronics Research Center Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama 223-8522 Japan Device Technology Research Institute National Institute of Advanced Industrial Science and Technology Tsukuba Central 2 1-1-1 Umezono Tsukuba Ibaraki 305-8568 Japan Department of Physics University of California Berkeley California 94720-300 USA

We present an imaging modality that enables detection of magnetic moments and their resulting stray magnetic fields. We use wide-field magnetic imaging that employs a diamond-based magnetometer and has combined magneto-optic detection (e.g., magneto-optic Kerr effect) capabilities. We employ such an instrument to image magnetic (stripe) domains in multilayered ferromagnetic structures.

关键词： Imaging & optical processing Magnetic domains Magnetic texture Spintronics Ferromagnets Magnetic multilayers Nitrogen vacancy centers in diamond Magneto-optical Kerr effect

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