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A Secured OpenFlow Protocol Using Elliptic Curves Cryptographic for Software Defined Networks

Journal of Physics: Conference Series 2018年第1期1019卷

作者： Layth A Khalil Al Dulaimi R Badlishah Ahmad Naimah Yaakob Qasim Mohammed Hussein Embedded Networking and Advance Computing Cluster School of Computer & Communication Engineering Universiti Malaysia Perlis (UniMAP) Tingkat 1 Kampus Tetap Pauh Putra 02600 Arau Perlis Faculty of Informatics and Computing Universiti Sultan Zainal Abidin 21300 Kuala Terengganu Terengganu Malaysia Control and Computer Engineering Department. Tikrit University Tikrit - Iraq

A Software-Defined Network (SDN) architecture was proposed to enhance the performance, flexibility and scalability of networks. However, SDN features such as centralized controlling, network programmability and virtualization present new security challenges to networks. This article will address security challenges related to SDN connection data transfer channels (i.e., control layer and infrastructure layer) and propose a novel connection data transfer channels architecture based on an OpenFlow protocol. Existing SDN OpenFlow protocols rely on higher layer secure mechanisms such as TLS (Transport Layer Security) / SSL (Secure Sockets Layer) sessions. It is concluded that the transfer of secured data using elliptical curve encryption provides a more efficient SDN network. The proposed architecture was implemented in a testbed and its security features were analyzed.

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ARON: Application-driven reconfigurable optical networking for HPC data centers 42

ARON: Application-driven reconfigurable optical networking f...

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42nd European Conference on Optical Communication, ECOC 2016

作者： Yuan, Guojun Proietti, Roberto Liu, Xiaoli Castro, Alberto Zang, Dawei Sun, Ninghui Liu, Cheyu Cao, Zheng Yoo, S.J.B. Institute of Computing Technology CAS Beijing China Institute of Computer and Control Engineering UCAS Beijing China Department of Electrical and Computer Engineering University of California DavisCA United States

ISBN: (纸本)9783800742745

We designed and experimentally demonstrated an application-driven adaptive network that supports fast topology reconfiguration by wavelength routing to match applications' communication characteristics. Even in a small-scale system, 1.25 × performance improvement is achieved by performing network reconfiguration. © VDE VERLAG GMBH Berlin Offenbach.

关键词： Adaptive optics

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Taming the big to small: efficient selfish task allocation in mobile crowdsourcing systems

Taming the big to small: efficient selfish task allocation i...

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作者： Li, Qingyu Yang, Panlong Fan, Xiaochen Tang, Shaojie Xiang, Chaocan Guo, Deke Li, Fan China Satellite Maritime Tracking and Control Department Jiangyin China College of Communications Engineering PLA University of Science and Technology Nanjing China University of Texas at Dallas RichardsonTX United States Logistic Engineering University of PLA Chongqing China National University of Defense Technology Changsha China Beijing Institute of Technology Beijing China School of Computer Science and Technology University of Science and Technology of China Hefei China School of Computer and Software Nanjing University of Information Science and Technology Nanjing China School of Computing and Communications Faculty of Engineering and Information Technology University of Technology Sydney UltimoNSW Australia

This paper investigates the selfish load balancing problem in mobile distributed crowdsourcing networks. Conventional methods heavily relied on cooperation among users to achieve balanced resource utilization in a platform-centric view. In achieving fairly low communication and computational overhead, this work leverages the d-choice method based on Ball and Bin theory for effective balancing under limited information and the Proportional Allocation scheme for selfish load balancing, maintaining good load balancing property among selfish users. Even with limited information, the balancing performance could be improved significantly. Moreover, theoretical analysis has been presented in convergence property. Extensive evaluations have been made to show that Chance-Choice outperforms several existing algorithms. Typically, comparing with Proportional Allocation scheme, it could decrease the load gap between the maximum and the minimal in system by 50% to 80% and reduce the overhead complexity from O(n) to O(1) comparing with the Max-weight Best Response algorithm, where n denotes the number of mobile users in a crowdsourcing system. Copyright © 2017 John Wiley & Sons, Ltd. Copyright © 2017 John Wiley & Sons, Ltd.

关键词： Crowdsourcing

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Design of Low-cost Position Differential Positioning System Based on STM32

Design of Low-cost Position Differential Positioning System ...

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Chinese Automation Congress

作者： Haijun Fu Ming Qiu Xisong Dong Gang Xiong Haonan Xiong Xiang Su Shichao Chen Zhen Shen Xiujiang Guo School of Artificial Intelligence Beijing Union University Beijing China The Cloud Computing Center Chinese Academy of Sciences Dongguan China The Qingdao Academy of Intelligent Industries Macau University of Science and Technology Qingdao China Beijing Union University Beijing China School of Electrical Engineering and Electronic Information Xihua University Chengdu China The State Key Laboratory for Management and Control of Complex Systems Chinese Academy of Sciences Beijing China The Beijing Engineering Research Center of Intelligent Systems and Technology Chinese Academy of Sciences Beijing China Department of Computer Science University of Helsinki Fin Finland Measurement Center Station PetroChina Huabei Oilfield Company Renqiu China

There exist some obstacles to realize high-precision positioning with using the position differential technique due to the limiting factors. However, with the advancement of chip performance and the establishment of multiple satellite navigation systems, position differential positioning can be realized to meet the civilian high-precision positioning demand while significantly reducing costs. This paper is to explore the engineering application and propose a new method. Through the experiments and data analysis, we have found the error correlation between two receivers in a small area and designed a set of positioning system, and programmed in the Keil μVision5 in C language. The system consists of the current mainstream low-cost STM32, UBLOX NEO 6M chip, NRF24L01 chip, GPS antenna and power supply module. Each two receivers can form a differential positioning system. At present, the system in the low-speed status is, in the urban environment, basically reaching within 0.5 - 3 m of the positioning error.

关键词： Position differential positioning Low cost Error correlation GPS STM32

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Combining scanning microscopy & robotics: Automated analysis & manipulation on the small scale 1

Combining scanning microscopy & robotics: Automated analysis...

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1st International Conference on Manipulation, Automation and Robotics at Small Scales, MARSS 2017

作者： Bartenwerfer, Malte Tiemerding, Tobias Haenssler, Olaf C. Fatikow, Sergej Department of Computing Science Division Microrobotics and Control Engineering University of Oldenburg Ammerländer Heerstraße 114-118 OldenburgD-26129 Germany OFFIS - Institute for Information Technology Research and Development Division Health Group Automated Nanohandling Escherweg 2 OldenburgD-26121 Germany Institut dElectronique de Microélectronique et de Nanotechnologie University of Lille CNRS UMR 8520 / University of Lille 1 Villeneuve dAscqF-59652 France

ISBN: (纸本)9781538603468

The ongoing miniaturization in micro- And nanotechnology requires multi-physical characterization methods on the same small scale as the materials and components are. Although many characterizations systems exist, only few approaches allow to gather several different types of information collaboratively. Furthermore, functional building blocks and devices working on the nanoscale, have to be characterized and tuned during the manufacturing process. This can be done with combined microscopic and processing systems. A software framework, which controls and acquires all units and data, is engaged and allows combined analysis and automation. This combination approach is demonstrated by several applications in microscopy, manipulation and automation on the small scale. © 2017 IEEE.

关键词： Automation

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Preservation of quantum Fisher information and geometric phase of a single qubit system in a dissipative reservoir through the addition of qubits

arXiv

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arXiv 2017年

作者： Guo, You-neng Qing-long, Tian Yun-fei, Mo Zeng, Ke Department of Electronic and Communication Engineering Changsha University Changsha Hunan410022 China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics Hunan Normal University Changsha410081 China Department of Mathematics and Computing Science Changsha University Changsha Hunan410022 China

In this paper, we have investigated the preservation of quantum Fisher information (QFI) of a single-qubit system coupled to a common zero temperature reservoir through the addition of noninteracting qubits. The results show that, the QFI is completely protected in both Markovian and non-Markovian regimes by increasing the number of additional qubits. Besides, the phenomena of QFI display monotonic decay or non-monotonic with revival oscillations depending on the number of additional qubits N −1 in a common dissipative reservoir. If N Copyright © 2017, The Authors. All rights reserved.

关键词： Qubits

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GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo during the Second Part of the Third Observing Run

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Physical Review X 2023年第4期13卷 041039-041039页

作者： R. Abbott T. D. Abbott F. Acernese K. Ackley C. Adams N. Adhikari R. X. Adhikari V. B. Adya C. Affeldt D. Agarwal M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith S. Akcay T. Akutsu S. Albanesi A. Allocca P. A. Altin A. Amato C. Anand S. Anand A. Ananyeva S. B. Anderson W. G. Anderson M. Ando T. Andrade N. Andres T. Andrić S. V. Angelova S. Ansoldi J. M. Antelis S. Antier S. Appert Koji Arai Koya Arai Y. Arai S. Araki A. Araya M. C. Araya J. S. Areeda M. Arène N. Aritomi N. Arnaud M. Arogeti S. M. Aronson K. G. Arun H. Asada Y. Asali G. Ashton Y. Aso M. Assiduo S. M. Aston P. Astone F. Aubin C. Austin S. Babak F. Badaracco M. K. M. Bader C. Badger S. Bae Y. Bae A. M. Baer S. Bagnasco Y. Bai L. Baiotti J. Baird R. Bajpai M. Ball G. Ballardin S. W. Ballmer A. Balsamo G. Baltus S. Banagiri D. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett M. A. Barton I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley A. C. Baylor M. Bazzan B. Bécsy V. M. Bedakihale M. Bejger I. Belahcene V. Benedetto D. Beniwal T. F. Bennett J. D. Bentley M. BenYaala F. Bergamin B. K. Berger S. Bernuzzi C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser D. Beveridge R. Bhandare U. Bhardwaj D. Bhattacharjee S. Bhaumik I. A. Bilenko G. Billingsley S. Bini R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht B. Biswas M. Bitossi M.-A. Bizouard J. K. Blackburn C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boer G. Bogaert M. Boldrini L. D. Bonavena F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi N. Bose S. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley A. Branch M. Branchesi J. Brandt J. E. Brau M. Breschi T. Briant J. H. Briggs A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz J. Bryant T. Bulik H. J. Bulten A. Buonanno R. Buscicchio D. Buskulic C. Buy R. L. Byer G. S. Cabourn Davies L. Cadonati G. Cagn LIGO Laboratory California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 Victoria Australia LIGO Livingston Observatory Livingston Louisiana 70754 USA University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Gravity Exploration Institute Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India University College Dublin Dublin 4 Ireland Gravitational Wave Science Project National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan INFN Sezione di Torino I-10125 Torino Italy Università di Napoli “Federico II” Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy Université de Lyon Université Claude Bernard Lyon 1 CNRS Institut L

The third Gravitational-Wave Transient Catalog (GWTC-3) describes signals detected with Advanced LIGO and Advanced Virgo up to the end of their third observing run. Updating the previous GWTC-2.1, we present candidate gravitational waves from compact binary coalescences during the second half of the third observing run (O3b) between 1 November 2019, 15∶00 Coordinated Universal Time (UTC) and 27 March 2020, 17∶00 UTC. There are 35 compact binary coalescence candidates identified by at least one of our search algorithms with a probability of astrophysical origin pastro>0.5. Of these, 18 were previously reported as low-latency public alerts, and 17 are reported here for the first time. Based upon estimates for the component masses, our O3b candidates with pastro>0.5 are consistent with gravitational-wave signals from binary black holes or neutron-star–black-hole binaries, and we identify none from binary neutron stars. However, from the gravitational-wave data alone, we are not able to measure matter effects that distinguish whether the binary components are neutron stars or black holes. The range of inferred component masses is similar to that found with previous catalogs, but the O3b candidates include the first confident observations of neutron-star–black-hole binaries. Including the 35 candidates from O3b in addition to those from GWTC-2.1, GWTC-3 contains 90 candidates found by our analysis with pastro>0.5 across the first three observing runs. These observations of compact binary coalescences present an unprecedented view of the properties of black holes and neutron stars.

关键词： Gravitational waves

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Modeling spacecraft orbit-attitude coupled dynamics in close proximity to asteroids

Modeling spacecraft orbit-attitude coupled dynamics in close...

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AIAA/AAS Astrodynamics Specialist Conference, 2016

作者： Bolatti, Dante A. de Ruiter, Anton H. J. Ryerson Aerospace Control Systems Research Group Department of Aerospace Engineering George Vari Engineering and Computing Centre Ryerson University TorontoONM5B 2K3 Canada Department of Aerospace Engineering George Vari Engineering and Computing Centre Ryerson University TorontoONM5B 2K3 Canada

ISBN: (数字)9781624104459

ISBN: (纸本)9781624104459

Asteroids possess highly irregular rotating gravitational fields, and together with other destabilizing factors such as solar gravitational inuence, motivates the development of precise modeling of the gravitational field and spacecraft dynamics near its surface. Typically, the spacecraft is assumed to be a point-mass, and this simplified model neglects the coupling between orbital and rotational motions of a rigid body. Additionally, in recent works that consider the spacecraft as a rigid body, a second degree-and-order spherical harmonics gravitational field has been used for the asteroid. This model does not accurately reflect the complex gravitational field of most small bodies, and does not converge inside the Brillouin sphere. This paper proposes an high fidelity gravitational model, that accounts for the orbital-attitude coupling effect for a rigid body spacecraft, while reflecting more accurately the irregular gravitational field of asteroids. This proposed model is based on the polyhedron gravitational model, augmented with point-masses distributed in the interior of the small body shape model. Simulations for the orbital motion of a rigid body spacecraft are presented, where the proposed gravitational model is compared to the spherical harmonics gravitational model expanded up to second degree-and-order. A comparison between point-mass and rigid body spacecraft orbital trajectories is also shown. These simulations are performed for trajectories in close proximity to asteroids 433 Eros and 4769 Castalia, including the gravitational effects of the Sun. © 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Asteroids

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Nano-granular Layers for Sensor Applications fabricated by Means of Electron Beam induced Deposition

Nano-granular Layers for Sensor Applications fabricated by M...

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Micro-Nano-Integration;6. GMM-Workshop

作者： W. Klauser M. Bartenwerfer P. Elfert E. Krauskopf S. Fatikow Division Microrobotics and Control Engineering Department of Computing Science University of Oldenburg

This work combines the Electron Beam induced Deposition technique with a purposeful scanning pattern generation for the scanning electron microscope by means of a self-developed scan generator. This allows for deposition of nanogranular metal structures with specific geometries, which can be used as strain sensors on the nano- and microscale. Furthermore, the deposition process is combined with a vision-based automation sequence using a self-developed software framework for drift compensation.

关键词： electron beam Deposit Economic Resources deposition drift compensation Software Frameworks strain sensors Scanning Electron Microscope Pattern generation scanning metal structure vapour deposition

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Efficient macroscopic urban traffic models for reducing congestion: A PDDL+ planning approach 30

Efficient macroscopic urban traffic models for reducing cong...

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30th AAAI Conference on Artificial Intelligence, AAAI 2016

作者： Vallati, Mauro Magazzeni, Daniele Schutter, Bart De Chrpa, Lukáš McCluskey, Thomas L. School of Computing and Engineering University of Huddersfield United Kingdom Department of Informatics King's College London United Kingdom Delft Center for Systems and Control Delft University of Technology Netherlands

ISBN: (纸本)9781577357605

The global growth in urbanisation increases the demand for services including road transport infrastructure, presenting challenges in terms of mobility. In this scenario, optimising the exploitation of urban road networks is a pivotal challenge. Existing urban traffic control approaches, based on complex mathematical models, can effectively deal with planned-Ahead events, but are not able to cope with unexpected situations -such as roads blocked due to car accidents or weather-related events- because of their huge computational requirements. Therefore, such unexpected situations are mainly dealt with manually, or by exploiting pre-computed policies. Our goal is to show the feasibility of using mixed discrete-continuous planning to deal with unexpected circumstances in urban traffic control. We present a PDDL+ formulation of urban traffic control, where continuous processes are used to model flows of cars, and show how planning can be used to efficiently reduce congestion of specified roads by controlling traffic light green phases. We present simulation results on two networks (one of them considers Manchester city centre) that demonstrate the effectiveness of the approach, compared with fixed-Time and reactive techniques. © Copyright 2016, Association for the Advancement of Artificial Intelligence (***). All rights reserved.

关键词： Roads and streets

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