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21st European Wireless Conference, European Wireless 2015

作者： Ropokis, George A. Tsinos, Christos G. Filippou, Miltiades C. Berberidis, Kostas Gesbert, David Ratnarajah, Tharmalingam Computer Technology Institute Press Diophantus Rio-Patras26500 Greece Dept. of Computer Engineering and Informatics University of Patras Rio-Patras26500 Greece Inst. for Digital Commun. Sch. of Eng. Univ. of Edinburgh EdinburghEH93FG United Kingdom Mobile Communications Dept. EURECOM BIOT 06410 France

ISBN: (纸本)9783800739769

The problem of optimal Power Policy (PP) design for hybrid interweave/underlay Cognitive Radio (CR) systems is investigated, in the presence of imperfect Spectrum Sensing (SS). A limited Channel State Information at the Transmitter (CSIT) scenario is considered, that has never been studied before, where the Secondary Transmitter (STx) uses combined instantaneous and statistical CSIT. Given such CSIT, the optimal PP with the aim of maximizing the average transmission rate of the CR system, subject to a constraint on the average interference caused by STx transmission to the primary system, is found. The derived PP is then exploited for the development of an iterative framework for the problem of jointly optimizing the sensing time and the applied PP. By means of simulations, it is shown that the proposed joint SS and PP optimization framework offers a clear gain in terms of the achievable rate of the CR system, with respect to conventional underlay and interweave CR systems, especially for intermediate values of the average interference constraint and also for different primary user activity regimes.

关键词： Cognitive radio

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Performance analysis and layout design of optical blades for HPCs using the OptoBoard-Sim simulator

Performance analysis and layout design of optical blades for...

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IEEE Optical Interconnects Conference

作者： S. Markou A. Siokis P. Maniotis K. Christodoulopoulos E. Varvarigos N. Pleros Department of Informatics Center for Research and Technology Hellas Thessaloniki Greece Computer Engineering and Informatics Dept. Computer Technology Institute and Press-Diophantus Patra Greece University of Patras Patras GR

We demonstrate the Optical Board Simulator platform for optical PCB layout design and performance evaluation. Performance of two optical Blades is compared to CRAY-XK7 Blade for the FFTW benchmark, revealing significa... 详细信息

关键词： Optical interconnections Blades Throughput Integrated circuit interconnections Layout Optical waveguides

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Numerical Analysis of Transmission Spectrum of X-shaped Photonic Crystal Waveguide for WDM System

Numerical Analysis of Transmission Spectrum of X-shaped Phot...

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International Conference on Complex, Intelligent and Software Intensive Systems, CISIS

作者： Hiroshi Maeda Michael Cada Yuting Bao Jianming Jin Kazuya Tomiura Dept. of Info. & Comm. Eng. Fukuoka Inst. of Tech. Fukuoka Japan Dept. of Electrical & Computer Engineering Dalhousie University Halifax NS Canada Master's Course of Comm. and Info. Networking Fukuoka Institute of Technology Fukuoka Japan

ISBN: (纸本)9781509009886

Frequency filtering characteristics by cavities of three different lengths situated in X-shaped photonic crystal waveguide with triangular lattice was simulated by constrained interpolated profile (CIP) method. From analysisi by fast Fourier transform of output signal, the resonant peak frequencies of filtered spectrum by microwave experiment and those by the simulation coincided each other in difference of order of 1%.

关键词： Photonic crystals Broadband antennas Software Physics Cavity resonators Lattices Fast Fourier transforms

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Linguistic Fuzzy Cognitive Map (LFCM) for Pattern Recognition

Linguistic Fuzzy Cognitive Map (LFCM) for Pattern Recognitio...

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IEEE International Conference on Fuzzy Systems

作者： G. A. Papakostas E. I. Papageorgiou V. G. Kaburlasos Dept. of Computer and Informatics Engineering EMT Institute of Technology Information Technologies Institute Center for Research and Technology

ISBN: (纸本)9781467374293

This paper introduces a preliminary extension of the Fuzzy Cognitive Map (FCM) architecture based on Lattice Computing (LC) techniques namely Linguistic Fuzzy Cognitive Maps (LFCM). The proposed LFCM is able to handle large scale data in pattern classification applications. This enhancement is achieved by applying a novel data meta-representation, defined in a mathematical lattice, including several advantages. Based on this mechanism a new FCM classifier model is constructed and its performance is studied herein. Preliminary experimental results are both promising and competitive. Future work extensions are discussed.

关键词： Big data Fuzzy cognitive maps Lattice computing Pattern recognition Fuzzy cognitive maps Pattern recognition big data Linguistics

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A mobile learning application for self-management of health and disease

A mobile learning application for self-management of health ...

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International Conference on Interactive Mobile Communication Technologies and Learning (IMCL)

作者： Christos Bouras Vaggelis Kapoulas Nikos Karacapilidis Vasileios Kokkinos Andreas Papazois Computer Technology Institute & PressDiophantus Patras Greece Department of Computer Engineering and Informatics University of Patras Greece Dept. of Mechanical Engineering and Aeronautics University of Patras Greece

Supporting self-management of patients is a highly challenging task, which needs to meaningfully exploit and interrelate approaches and technologies concerning interactive communication, personalized health and mobile learning. In line with these remarks, this paper reports on the development of an innovative clinical decision support platform for self-management of health and disease purposes. Work presented focuses on two basic components of the platform, namely a web-based collaboration support tool and a mobile application, both aiming to augment the interaction of all types of stakeholders with the platform. The functionality of the above components is sketched through a realistic use case.

关键词： Collaboration Mobile communication Mobile applications Diseases Stakeholders Monitoring

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Clotho: Proactive wearout deceleration in Chip-Multiprocessor interconnects

Clotho: Proactive wearout deceleration in Chip-Multiprocesso...

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IEEE International Conference on computer Design: VLSI in computers and Processors, (ICCD)

作者： Arseniy Vitkovskiy Vassos Soteriou Paul V. Gratz Dept. of Electrical Eng. Computer Eng. and Informatics Cyprus University of Technology Dept. of Electrical and Computer Engineering Texas A&M University

With advancing process technology, Chip-Multiprocessors (CMPs) are experiencing ever worsening reliability due to prolonged operational stresses. The network-on-chip that interconnects the components of CMPs is especially vulnerable to such wearout-induced failure. To tackle this ominous threat we present Clotho, a novel, wearout-aware routing algorithm. Clotho continuously considers the stresses the on-chip interconnect experiences at runtime, along with temperature and fabrication process variation metrics, steering traffic away from locations that are most prone to Electromigration (EM)- and Hot-Carrier Injection (HCI)-induced wear. Under realistic workloads Clotho yields 66% and 8% average increases in mean time to failure for EM and HCI, respectively.

关键词： Human computer interaction Transistors Routing Stress Electromigration Correlation Integrated circuit interconnections

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Power Management and Rate Control Mechanism for Wi-Fi Infrastructure Networks

Power Management and Rate Control Mechanism for Wi-Fi Infras...

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International Conference on computer and Information technology (CIT)

作者： Christos Bouras Vaggelis Kapoulas Kostas Stamos Nikos Stathopoulos Nikos Tavoularis Computer Engineering and Informatics Dept. University of Patras Greece Computer Technology Institute and Press “Diophantus” Patras Greece Comput. Technol. Inst. & Press “Diophantus” Patras Greece

The advances in wireless networks have encouraged the use of mobile devices in everyday life. However, one of the main problems of these devices is the limited amount of energy they have available to use in order to function and the extended energy consumption of wireless adapters. A lot of research has been done to reduce the amount of energy spent on wireless communications. On the other hand, the extended use of wireless networks causes interference problems in communications, which affect the overall performance of each network. The purpose of this work is to provide a mechanism, which can reduce the power consumption on the station side and increase the mobile devices' operation time, and in combination with a rate adaptation mechanism on the access point side, improve the overall performance of the network.

关键词： Signal to noise ratio Interference Bit rate Wireless networks Power demand Loss measurement

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Challenging local realism with human choices

arXiv

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arXiv 2018年

作者： Abellán, C. Acín, A. Alarcón, A. Alibart, O. Andersen, C.K. Andreoli, F. Beckert, A. Beduini, F.A. Bendersky, A. Bentivegna, M. Bierhorst, P. Burchardt, D. Cabello, A. Cariñe, J. Carrasco, S. Carvacho, G. Cavalcanti, D. Chaves, R. Cortés-Vega, J. Cuevas, A. Delgado, A. de Riedmatten, H. Eichler, C. Farrera, P. Fuenzalida, J. García-Matos, M. Garthoff, R. Gasparinetti, S. Gerrits, T. GhafariJouneghani, F. Glancy, S. Gómez, E.S. González, P. Guan, J.-Y. Handsteiner, J. Heinsoo, J. Heinze, G. Hirschmann, A. Jiménez, O. Kaiser, F. Knill, E. Knoll, L.T. Krinner, S. Kurpiers, P. Larotonda, M.A. Larsson, J.-Å. Lenhard, A. Li, H. Li, M.-H. Lima, G. Liu, B. Liu, Y. López Grande, I.H. Lunghi, T. Ma, X. Magaña-Loaiza, O.S. Magnard, P. Magnoni, A. Martí-Prieto, M. Martínez, D. Mataloni, P. Mattar, A. Mazzera, M. Mirin, R.P. Mitchell, M.W. Nam, S. Oppliger, M. Pan, J.-W. Patel, R.B. Pryde, G.J. Rauch, D. Redeker, K. Rieländer, D. Ringbauer, M. Roberson, T. Rosenfeld, W. Salathé, Y. Santodonato, L. Sauder, G. Scheidl, T. Schmiegelow, C.T. Sciarrino, F. Seri, A. Shalm, L.K. Shi, S.-C. Slussarenko, S. Stevens, M.J. Tanzilli, S. Toledo, F. Tura, J. Ursin, R. Vergyris, P. Verma, V.B. Walter, T. Wallraff, A. Wang, Z. Weinfurter, H. Weston, M.M. White, A.G. Wu, C. Xavier, G.B. You, L. Yuan, X. Zeilinger, A. Zhang, Q. Zhang, W. Zhong, J. 08860 Spain ICREA Institució Catalana de Recerca i Estudis Avançats Barcelona08010 Spain Center for Optics and Photonics MSI-Nucleus for Advanced Optics Universidad de Concepción Casilla 4016 Concepción Chile Departamento de Ingeniería Eléctrica Universidad de Concepción 160-C Concepción Chile Parc Valrose Nice Cedex 206108 France Quantum Device Lab Department of Physics ETH Zurich ZurichCH-8093 Switzerland Dipartimento di Fisica Sapienza Università di Roma RomaI-00185 Italy Departamento de Computación FCEyN UBA and ICC CONICET Ciudad Universitaria Pabellón 1 Buenos Aires1428 Argentina National Institute of Standards and Technology 325 Broadway BoulderCO80305 United States Ludwig-Maximilians-Universität München80799 Germany Departamento de Física Aplicada II Universidad de Sevilla Sevilla41012 Spain Departamento de Física Universidad de Concepción 160-C Concepción Chile International Institute of Physics Federal University of Rio Grande do Norte Natal59070-405 Brazil Austrian Academy of Sciences Boltzmanngasse 3 Vienna1090 Austria Centre for Quantum Computation and Communication Technology Griffith University BrisbaneQLD4111 Australia Centre for Quantum Dynamics Griffith University BrisbaneQLD4111 Australia Shanghai Branch National Laboratory for Physical Sciences at Microscale Dept. of Modern Physics University of Science and Technology of China Shanghai230026 China DEILAP CITEDEF & CONICET J.B. de La Salle 4397 1603 Villa Martelli Buenos Aires Argentina Departamento de Física FCEyN UBA and IFIBA Ciudad Universitaria Conicet Pabellón 1 Buenos Aires1428 Argentina Department of Electrical Engineering Linköping University Linköping581 83 Sweden State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China CAS Center for Excellence in Superconducting Electronics Shanghai200050 China School of Computer NUDT

A Bell test is a randomized trial that compares experimental observations against the philosophical worldview of local realism1, in which the properties of the physical world are independent of our observation of them and no signal travels faster than light. A Bell test requires spatially distributed entanglement, fast and high-efficiency detection and unpredictable measurement settings2,3. Although technology can satisfy the first two of these requirements4–7, the use of physical devices to choose settings in a Bell test involves making assumptions about the physics that one aims to test. Bell himself noted this weakness in using physical setting choices and argued that human ‘free will’ could be used rigorously to ensure unpredictability in Bell tests8. Here we report a set of local-realism tests using human choices, which avoids assumptions about predictability in physics. We recruited about 100,000 human participants to play an online video game that incentivizes fast, sustained input of unpredictable selections and illustrates Bell-test methodology9. The participants generated 97,347,490 binary choices, which were directed via a scalable web platform to 12 laboratories on five continents, where 13 experiments tested local realism using photons5,6, single atoms7, atomic ensembles10, and superconducting devices11. Over a 12-hour period on 30 November 2016, participants worldwide provided a sustained data flow of over 1,000 bits per second to the experiments, which used different human-generated data to choose each measurement setting. The observed correlations strongly contradict local realism and other realistic positions in bipartite and tripartite12 scenarios. Project outcomes include closing the ‘freedom-of-choice loophole’ (the possibility that the setting choices are influenced by ‘hidden variables’ to correlate with the particle properties13), the utilization of video-game methods14 for rapid collection of human generated randomness, and the use of network

关键词： Testing

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A novel tool for cost-efficient broadband development through infrastructure sharing

A novel tool for cost-efficient broadband development throug...

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IEEE Symposium on computers and Communications (ISCC)

作者： Konstantinos Antonis Christos Bouras Georgios Diles Vasileios Kokkinos Leonidas Loukopoulos Technological Institute of Central Greece Greece Computer Engineering and Informatics Dept. Univ. of Patras Greece Computer Technology Institute & Press “Diophantus” Patras Greece

Broadband is a public utility with positive effects on competitiveness, employment and growth. Although evidence shows that broadband development is increasing, this increment is not homogeneous between urban and rural areas. The main cause is the high cost for deploying next generation networks in rural areas, and especially the cost linked to civil engineering works. In order to overcome the investment challenges arising in the context of broadband deployment, the European Commission made mandatory the sharing of existing telecommunication and non-telecommunication infrastructures and facilities. This paper proposes and presents a novel tool that enables the estimation of the expected savings from exploiting existing infrastructures when deploying a broadband network. This is followed by a number of general principles and recommendations that policy makers and national authorities could embrace to diminish deployment costs and promote broadband deployment.

关键词： Broadband communication Optical fiber subscriber loops Wireless networks Europe Investment Optical fibers

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Unmanned Aircraft As Mobile Components Of Ocean Observing Systems For Management Of Marine Resources

Unmanned Aircraft As Mobile Components Of Ocean Observing Sy...

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OCEANS MTS/IEEE Monterey (Conference)

作者： Trent Lukaczyk Tamaki Bieri Joao Tasso de Sousa Joshua Levy Philip A. McGillivary FlightWave Aerospace Systems Los Angeles California USA Stanford University Zurich Switzerland Dept. Electrical & Computer Engineering Underwater Systems & Technology Lab University of Porto Portugal University of Hawaii Hawaii Inst. of Marine Biology Coconut Island USA US Coast Guard PACAREA Alameda California USA

ISBN: (纸本)9781509015276

Recent technological developments in Unmanned Aerial Systems (UAS) have allowed the integration of UAS into the field of marine science. UAS provide a low risk, low cost platform to collect and relay data at various spatial and temporal scales. As an integral part of Ocean Observation Systems (OOS), UAS can provide an agile platform for delivering high-bandwidth, high-frequency data between surface sensors, roving sensors (AUVs and other UAS's), OOS hubs, and surface stations. Harnessing this new capability can improve the quality and efficiency of data collection and distribution by OOS, which yields improved data for the adaptive management of marine resources.

关键词： Unmanned Aircraft Systems UAS Ocean Observing System OOS Networks Reconfigurability Adaptability

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