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28th IEEE International Symposium on Defect and Fault Tolerance in VLSI and Nanotechnology Systems, DFTS 2015

作者： Rodrigues, Diego Nazarian, Ghazaleh Moreira, Álvaro Carro, Luigi Gaydadjiev, Georgi Institute of Informatics Federal University of Rio Grande Do sul Porto Alegre Brazil Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology Delft Netherlands Department of Computer Science and Engineering Chalmers University of Technology Gothenburg Sweden

ISBN: (纸本)9781509003129

Software-based methods for the detection of control-flow errors caused by transient fault usually consist in the introduction of protecting instructions both at the beginning and at the end of basic blocks. These methods are conservative in nature, in the sense that they assume that all blocks have the same probability of being the target of control flow errors. Because of that assumption they can lead to a considerable increase both in memory and performance overhead during execution time. In this paper, we propose a static analysis that provide a more refined information about which basic blocks can be the target of control-flow-errors caused by single-bit flips. This information can then be used to guide a program transformation in which only susceptible blocks have to be protected. We implemented the static analysis and program transformation in the context of the LLVM framework and performed an extensive fault injection campaign. Our experiments show that this less conservative approach can potentially lead to gains both in memory usage and in execution time while keeping high fault coverage. © 2015 IEEE.

关键词： Fault tolerance

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Preface

Advances in Intelligent Systems and Computing

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Advances in Intelligent Systems and Computing 2017年 462卷 v-vi页

作者： Kulczycki, Piotr Kóczy, László T. Mesiar, Radko Kacprzyk, Janusz Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland Systems Research Institute Polish Academy of Sciences Warsaw Poland Department of Information Technology Széchenyi István University Győr Hungary Faculty of Electrical Engineering and Informatics Budapest University of Technology and Economics Budapest Hungary Faculty of Civil Engineering Slovak University of Technology Bratislava Slovakia

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A glimpse at Paul G. Spirakis

A glimpse at Paul G. Spirakis

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European Symposium on Algorithms, ESA 2015

作者： Chatzigiannakis, Ioannis Fotakis, Dimitris Kontogiannis, Spyros Michail, Othon Nikoletseas, Sotiris Pantziou, Grammati Zaroliagis, Christos Computer Technology Institute and Press ‘Diophantus’ Patras University Campus N. Kazantzaki Str. Patras Greece Sapienza University of Rome Rome Italy Division of Computer Science School of Electrical and Computer Engineering National Technical University of Athens Athens Greece Department of Computer Science and Engineering University of Ioannina Ioannina Greece Department of Computer Engineering and Informatics University of Patras Patras Greece Department of Informatics Technological Educational Institution of Athens Egaleo Greece

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Sometimes, faculty matter: The contribution of faculty support to future engagement 122

Sometimes, faculty matter: The contribution of faculty suppo...

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2015 122nd ASEE Annual Conference and Exposition

作者： Wilson, Denise Jones, Diane Carlson Bates, Rebecca A. Smith, Tamara Floyd Plett, Melani Veilleux, Nanette M. Department of Electrical Engineering University of Washington Seattle United States Department of Integrated Engineering Minnesota State University Mankato United States Department of Chemical Engineering Tuskegee University United States Department of Electrical Engineering Seattle Pacific University United States Computer Science and Informatics Program Simmons College BostonMA United States

In this study, we examine the contribution of student-faculty interactions to the future engagement of students in their academic endeavors. These relationships were evaluated in a one-year longitudinal study of STEM (including engineering and computer science) students at five different institutions. These five institutions include three types of Carnegie 2010 classifications (Bac-Diverse, Master's L, and RU-VH), four geographical locations including the northwest, northeast, midwest, and southeast, and both public and private institutions with total undergraduate enrollments varying from 1,900 to 29,000 students. Both behavioral (effort, participation) and emotional (positive, negative) aspects of engagement are studied. Results show that significant relationships emerged for three of the five schools between faculty support and engagement. Formal faculty support (that provided in the context of a particular course) predicted effort (a form of behavioral engagement) at the HBCU in this study and also positive emotional engagement for both the HBCU and Teaching institution. Informal faculty support (that provided outside the context of a particular course) predicted participation (another form of behavioral engagement) and positive emotional engagement at the Research institution in the study. These results suggest that institutional culture influences how what faculty do predicts future engagement outcomes for students. At the Research institution, it appears that what happens between faculty and students outside of class influences students while at smaller or teaching-oriented institutions, what faculty do inside a class matters more. These results can provide important insight to faculty as to how to guide their interactions with students at different institutions to make the most difference in students' academic lives. © American Society for engineering Education, 2015.

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Comparing Selected PSO Modifications on CEC 15 Benchmark Set

Comparing Selected PSO Modifications on CEC 15 Benchmark Set

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IEEE Symposium Series on Computational Intelligence

作者： Michal Pluhacek Tomas Kadavy Roman Senkerik Adam Viktorin Ivan Zelinka Faculty of Applied Informatics Tomas Bata University in Zlin T.G. Masaryka 5555 760 01 Czech Republic Faculty of Electrical Engineering and Computer Science V?B-Technical University of Ostrava 17. listopadu 15 708 33 Poruba Czech Republic

ISBN: (纸本)9781509042418

In this paper we choose to compare three popular modifications of Particle Swarm Optimization (PSO) using the recent CEC'15 benchmark set. Three different approaches for PSO modification are compared: the heterogeneous swarm, diversity-guided swarm and orthogonal learning based approach. The goal is to provide up-to date comparison of the performance of these methods on a state-of-art benchmark set and highlight the differences in performance on different types of fitness functions. The experiments were carried out according to CEC benchmark rules and statistically evaluated.

关键词： Particle swarm optimization PSO ARPSO HPSO OLPSO

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Thin Teflon-FEP capacitors with open-tubular channels employed on low-pressure measurements for smart-grid monitoring systems

Thin Teflon-FEP capacitors with open-tubular channels employ...

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IEEE Conference on electrical Insulation and Dielectric Phenomena, CEIDP 2015

作者： Araújo, Ewerton Bruno Lima De Amorim, Mardson Freitas Altafim, Ruy Alberto Pisani Cavalcanti, Antonio Carlos Altafim, Ruy Alberto Corrêa Computer Systems Department Informatics Center Federal University of Paraíba João Pessoa Brazil Informatics Department Informatics Center Federal University of Paraíba João Pessoa Brazil Electrical Engineering Department São Carlos Engineering School University of São Paulo São Carlos Brazil

ISBN: (纸本)9781467374972

In order to improve quality and efficiency in electrical energy distribution, power supply companies have sought for better ways to monitor their equipment, stimulating research in smart-grid projects. Equipment subjected to constant monitoring are power and distribution transformers, in which severe faults can be avoided through preventive maintenance, such as, detecting partial discharges in early stages, conducting oil chemical analysis or monitoring transformer internal pressure. In the present contribution we discuss the use of thin voided capacitors made of fluoroethylenepropylene (FEP) films to measure pressure changes in sealed chambers, as in distribution transformers. Voided film structures are very sensitive to pressure variations due to their low mechanical resistance in the thickness direction. Here voided capacitors were fabricated using the same thermal lamination process reported to produce piezoelectrets with open tubular channels. In order to measure pressure disturbance an electrical circuit was specifically designed for detecting variations in capacitance and results correlating these changes with pressure increase are presented. © 2015 IEEE.

关键词： Preventive maintenance

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Pipelined SHA-3 implementations on FPGA: Architecture and performance analysis 15

Pipelined SHA-3 implementations on FPGA: Architecture and pe...

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2nd Workshop on Cryptography and Security in Computing Systems, CS2 2015

作者： Michail, Harris E. Ioannou, Lenos Voyiatzis, Artemios G. Department of Electrical Engineering Computer Engineering and Informatics Cyprus University of Technology Lemesos3036 Cyprus Industrial Systems Institute Athena RIC in ICT and Knowledge Technologies Stadiou Str. Platani PatrasGR-26504 Greece

ISBN: (纸本)9781450331876

Efficient and high-throughput designs of hash functions will be in great demand in the next few years, given that every IPv6 data packet is expected to be handled with some kind of security features. In this paper, pipelined implementations of the new SHA- 3 hash standard on FPGAs are presented and compared aiming to map the design space and the choice of the number of pipeline stages. The proposed designs support all the four SHA-3 modes of operation. They also support processing of multiple messages each comprising multiple blocks. Designs for up to a four-stage pipeline are presented for three generations of FPGAs and the performance of the implementations is analyzed and compared in terms of the throughput/area metric. Several pipeline designs are explored in order to determine the one that achieves the best throughput/area performance. The results indicate that the FPGA technology characteristics must also be considered when choosing an efficient pipeline depth. Our designs perform better compared to the existing literature due to the extended optimization effort on the synthesis tool and the efficient design of multiblock message processing. Copyright © 2014 by the Association for Computing Machinery, Inc. (ACM).

关键词： Field programmable gate arrays (FPGA)

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Towards High-Performance and Power-Efficient Optical NoCs Using Silicon-in-Silica Photonic Components

Towards High-Performance and Power-Efficient Optical NoCs Us...

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International Workshop on Interconnection Network Architectures: On-Chip, Multi-Chip (INA-OCMC)

作者： Elena Kakoulli Vassos Soteriou Charalambos Koutsides Kyriacos Kalli Department of Electrical Engineering Computer Engineering and Informatics Cyprus University of Technology Limassol Cyprus

ISBN: (纸本)9781479918713

Networks-on-Chips (NoCs) are meeting the growing inter-tile communication needs of multicore chips. However, achieving system scalability by utilizing hundreds of cores on-chip requires high performance, yet energy-efficient on-chip interconnects. As electrical interconnects are marred by high energy-to-bandwidth costs, threatening multicore scalability, on-chip nanophotonics, which offer high throughput, yet energy-efficient communication, are an alternative attractive solution. In this paper we consider silicon nanophotonic components that are embedded completely within the silica (SiO 2 ) substrate as opposed to prior-art that utilizes die on-surface silicon nanophotonics. As nanophotonic components now reside in the silica substrate's subsurface, a greater portion of a chip's real estate can be utilized by cores and routers, while non-obstructive interconnect geometries offering higher network throughput can be implemented. First, we show using detailed simulations based on commercial tools that such silicon-in-silica (SiS) structures are feasible, and then demonstrate our proof of concept by utilizing a hybrid SiS-based photonic mesh-diagonal links topology that provides both higher effective throughput and throughput-to-power ratio versus prior-art.

关键词： Optical waveguides Ports (computers) Topology Nanophotonics Silicon computer architecture

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SH-CRAN: Hierarchical framework to support mobile big data computing in a secure manner

SH-CRAN: Hierarchical framework to support mobile big data c...

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ACM Workshop on Mobile Big Data, Mobidata 2015

作者： Liu, Qiang Ngai, Edith C.-H. Hu, Xiping Sheng, Zhengguo Leung, Victor C.M. Yin, Jianping School of Computer National University of Defense Technology Changsha Hunan China Department of Information Technology Uppsala University Uppsala Sweden Department of Electrical and Computer Engineering University of British Columbia Vancouver Canada School of Engineering and Informatics University of Sussex Brighton United Kingdom

ISBN: (纸本)9781450335249

The heterogeneous cloud radio access network (H-CRAN) has been emerging as a cost-effective solution supporting huge volumes of mobile traffic in the big data era. This paper investigates potential security challenges on H-CRAN and analyzes their likelihoods and difficulty levels. Typically, the security threats in H-CRAN can be categorized into three groups, i.e., security threats towards remote radio heads (RRHs), those towards the radio cloud infrastructure and towards backhaul networks. To overcome challenges made by the security threats, we propose a hierarchical security framework called Secure H-CRAN (SH-CRAN) to protect the H-CRAN system against the potential threats. Specifically, the architecture of SH-CRAN contains three logically independent secure domains (SDs), which are the SDs of radio cloud infrastructure, RRHs and backhauls. The notable merits of SH-CRAN include two aspects: (i) the proposed framework is able to provide security assurance for the evolving H-CRAN system, and (ii) the impacts of any failure are limited in one specific component of H-CRAN. The proposed SH-CRAN can be regarded as the basis of the future security mechanisms of mobile bag data computing. Copyright © 2015 ACM.

关键词： Big data

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How engineering students study: Alone, together, or start alone, end together 122

How engineering students study: Alone, together, or start al...

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2015 122nd ASEE Annual Conference and Exposition

作者： Wilson, Denise Allendoerfer, Cheryl Bates, Rebecca A. Smith, Tamara Floyd Plett, Melani I. Veilleux, Nanette M. Department of Electrical Engineering University of Washington Seattle United States College of Engineering University of Washington United States Department of Integrated Engineering Minnesota State University Mankato United States Department of Chemical Engineering Tuskegee University United States Department of Electrical Engineering Seattle Pacific University United States Computer Science and Informatics Program Simmons College BostonMA United States

This study interviewed 33 students from four different institutions in a variety of engineering and computer science majors in order to understand how and why students study the way they do. The institutions involved in this research include two types of Carnegie 2010 Classifications (Master's L and RU-VH), geographical locations in the northwest, northeast, and midwest, both public and private institutions, and enrollments varying from 3,500 to 29,000 students (total undergraduates among all majors). Although this interview pool does not provide a large sample size, and thus results must be interpreted qualitatively and with caution, we found that a majority of students begin their studying alone and seek help only later when they run into trouble with their coursework. Despite the fact that this Start alone, End together model for studying was the predominant approach among interviewees, the reasons for choosing this mode of studying vary. For example, students at the small Women's college in this study reported easy accessibility to faculty as a reason to refrain from studying in groups, while students at the large research university reported a need to focus properly, learn fully, and make the most efficient use of limited time as the prevalent reason for beginning their study alone. Furthermore, when asked how they prefer to study, many students shift from a Start alone, End together model to a Start alone, End alone model, suggesting that students may have unrealistic expectations of being able to complete assignments and study on their own. Still other students, while making the best of Start alone, End together, expressed that they would much rather work in a group from start to finish. The results of our student interviews suggest the need for a larger study that investigates how prevalent the Start alone, End together model of studying is among a large, representative sample of engineering and computer science students and if it is an arrangement that stud

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