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International Conference on Security and Privacy for Emerging Areas in Communications Networks (SecureComm)

作者： Songqing Chen Shiping Chen Xinyuan Wang Sushil Jajodia Department of Computer Science George Mason University USA Center for Secure Information Systems George Mason University USA Department of Information and Software Engineering George Mason University USA

With the development of Internet computing techniques, continuous data streams from remote sites are commonly used in scientific and commercial applications. Correspondingly, there is increasing demand of assuring the integrity and authenticity of received data streams. Existing strategies of assuring data integrity and authenticity mainly use message authentication codes (MAC) generated on data blocks and transfer the MAC to the receiver for authentication through either out of band communication or in band communication. Transferring the MAC via out of band communication inevitably introduces communication overhead and additional complexity to synchronize the out of band communication with the data communication. Transferring the MAC via in band channel can be achieved by either appending the MAC to the original data or embedding the MAC into the original data, which would either incur communication overhead or change the original data. It would be desirable to be able to authenticate the stream data without any communication overhead and changing the original data at the same time. To deal with data packet or block loss, many of existing stream data authentication schemes rely on hash chaining, the current usage of which results in uncertainty in authenticating the subsequent data blocks once the first data packet or block loss is detected. In this paper, we propose a novel application layer authentication strategy called DaTA. This authentication scheme requires no change to the original data and causes no additional communication overhead. In addition, it can continue authenticating the rest of data stream even if some data loss has been detected. Our analysis shows that our authentication scheme is robust against packet loss and network jitter. We have implemented a prototype system to evaluate its performance. Our empirical results show that our proposed scheme is efficient and practical under various network conditions

关键词： Message authentication Internet Streaming media Hurricanes Demand forecasting computer science Information systems software engineering Data communication Propagation losses

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Topological Localization Based on Salient Regions in Unknown Environments

Topological Localization Based on Salient Regions in Unknown...

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International Conference on Pattern Recognition

作者： Lu Wang Yuling Li Zixing Cai Department of Computer Science Zhongyuan University of Technology Zhengzhou Zhengzhou Henan China Center of Intelligent System and Software School of Information Science and Engineering Central South University Changsha Hunan China

ISBN: (纸本)0769525210

This paper presents a new topological localization system for mobile robot navigation based on salient visual regions. These salient regions are obtained by computing the opponencies of color and texture among multi-scale image spaces. Then they are organized to construct the vertex of topological map using hidden Markov model. So localization problem can be transformed to the evaluation problem of HMM. In our system, the topological map of environment can be created online and the robot locates itself concurrently. Experiments show that higher ratio of vertex recognition, that is localization, is obtained. And our system can guarantee mobile robot navigation safely in unknown environments

关键词： Mobile robots Hidden Markov models Lighting Navigation Prototypes Histograms Space technology Robot kinematics Cameras computer vision

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Evacuation Planning via Evolutionary Computation

Evacuation Planning via Evolutionary Computation

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Congress on Evolutionary Computation

作者： A. Garrett B. Carnahan R. Muhdi J. Davis G. Dozier M.P. SanSoucie P.V. Hull M.L. Tinker Department of Computer Science and Software Engineering Auburn University Auburn AL USA Department of Industrial & Systems Engineering Auburn University Auburn AL USA NASA Marshall Space Flight Center Huntsville AL USA

According to the Life Safety Code reg , the geometry of a building, the location of exits, and the number of exits dictate the means of egress for all people occupying a building. In this paper we show how evolutionary computations in the form of Genetic Algorithms and Estimation of Distribution Algorithms are used to evolve the placement of exits in order to optimize overall evacuation time. In particular, a generational GA, a steady-state GA, and an elitist EDA are used to evolve the placement of exits for two practical design problems. The algorithms are evaluated in terms of success rate, number of function evaluations, and best fitness. For both problems, the steady-state GA outperformed the other algorithms in all evaluation categories.

关键词： Evolutionary computation Safety Electronic design automation and methodology Buildings Humans Genetic algorithms Steady-state Fires NASA Geometry

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BlueGene/L Failure Analysis and Prediction Models

BlueGene/L Failure Analysis and Prediction Models

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International Conference on Dependable Systems and Networks (DSN)

作者： Yinglung Liang Yanyong Zhang A. Sivasubramaniam M. Jette R. Sahoo Electrical & Computer Engineering Department Rutgers University USA Computational Resource Management Group Lawrence Livemore National Laboratory USA Computer Science & Engineering Department Pennslyvania State University USA Exploratory Systems Software Department IBM Thomas J. Watson Research Center USA

The growing computational and storage needs of several scientific applications mandate the deployment of extreme-scale parallel machines, such as IBM's BlueGene/L which can accommodate as many as 128 K processors. One of the challenges when designing and deploying these systems in a production setting is the need to take failure occurrences, whether it be in the hardware or in the software, into account. Earlier work has shown that conventional runtime fault-tolerant techniques such as periodic checkpointing are not effective to the emerging systems. Instead, the ability to predict failure occurrences can help develop more effective checkpointing strategies. Failure prediction has long been regarded as a challenging research problem, mainly due to the lack of realistic failure data from actual production systems. In this study, we have collected RAS event logs from BlueGene/L over a period of more than 100 days. We have investigated the characteristics of fatal failure events, as well as the correlation between fatal events and non-fatal events. Based on the observations, we have developed three simple yet effective failure prediction methods, which can predict around 80% of the memory and network failures, and 47% of the application I/O failures

关键词： Failure analysis Predictive models Production systems Checkpointing Concurrent computing Parallel machines Hardware Runtime Fault tolerant systems Prediction methods

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Perspective-based reading: A replicated experiment focused on individual reviewer effectiveness

Perspective-based reading: A replicated experiment focused o...

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作者： Maldonado, José C. Carver, Jeffrey Shull, Forrest Fabbri, Sandra Dória, Emerson Martimiano, Luciana Mendonça, Manoel Basili, Victor 400-Centro Av. Trabalhador São-Carlense 13560 São Carlos SP Brazil Department of Computer Science and Engineering 300 Butler Hall Mississippi State University Mississippi State MS 39762 United States Fraunhofer Center for Experimental Software Engineering Maryland 4321 Hartwick Road College Park MD 20740 United States Departamento de Computação Universidade Federal de São Carlos Rodovia Washington Luiz km235 Caixa Postal 676 São Carlos SP 13565-905 Brazil Universidade do Oeste Paulista Faculdade de Informática de Presidente Prudente Campus I 700 Bloco H - 1o andar CEP:19050-680 São Carlos SP Brazil 400-Centro Av. Trabalhador São-Carlense 13560 São Carlos SP Brazil Departamento de Ciências Exatas-NUPERC Universidade Salvador Rua Ponciano de Salvador-BA 41950 Oliveira 126 275 Brazil Fraunhofer Center for Experimental Software Engineering Department of Computer Science University of Maryland College Park MD 20742 United States ACM IEEE Computer Society Computer Science and Engineering Department Mississippi State University Department of Computer Science Federal University of São Carlos São Paulo Brazil Faculdade de Informática de Presidente Prudente Universidade do Oeste Paulista Brazilian Computer Society Brazil Department of Computer Science University of Maryland NASA/GSFC

This paper describes a replication conducted to compare the effectiveness of inspectors using Perspective Based Reading (PBR) to the effectiveness of inspectors using a checklist. The goal of this replication was to better understand the complementary aspects of the PBR perspectives. To this end, a brief discussion of the original study is provided as well as a more detailed description of the replication. A detailed statistical analysis is then provided along with analysis of the PBR perspectives. For the individual PBR perspectives, we saw an interesting dichotomy: In the original study there was little overlap among the sets of defects found by each of the three perspectives, while in the replication two of the three perspectives found similar sets of defects on one of the two documents used in the study. Interestingly this document was the only case where the users of PBR were not more effective than the users of a checklist. This result leads to a new hypothesis that the complementary aspect of the PBR perspectives is the characteristic that provides the benefit over other defect detection techniques. © Springer science + Business Media, Inc. 2006.

关键词： software engineering

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Impact of Load Sharing on Provisioning Services with Consistency Requirements

Impact of Load Sharing on Provisioning Services with Consist...

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： D. Villela V. Misra D. Rubenstein S. Sahu Department of Electrical Engineering Columbia University NY USA Department of Computer Science Columbia University NY USA Network Software and Servers IBM Thomas J. Watson Research Center Hawthorne NY USA

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Particles with Age for Data Clustering

Particles with Age for Data Clustering

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International Conference on Information Technology (ICIT)

作者： Satchidananda Dehuri Ashish Ghosh Rajib Mall P.G. Department of Information and Communication Technology Fakir Mohan University Balasore India Machine Intelligence Unit and Center for Soft computing Research Indian Statistical Institute Kolkata India Department of Computer Science and Engineering Indian Institute of Technology Kharagpur Kharagpur India

This paper proposes a novel particle swarm optimisation (PSO) algorithm using the concept of age of particles. Effective fitness of a particle depends both on its functional value and age. Age of a newly generated particle is taken as zero, and in every iteration age of each individual is increased by one. In this paper, a trapezoidal aging function is considered. The model aims to emulate natural swarm system in a more natural way. The effectiveness of this concept is demonstrated by cluster analysis. Results show that the model provides enhanced performance and maintains more diversity in the swarm and thereby allows the particles to be robust to trace the changing environment.

关键词： Particle swarm optimization Aging Equations Birds Clustering algorithms Machine learning algorithms Communications technology Machine intelligence computer science Robustness

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WISENT: e-science for Energy Meteorology

WISENT: e-Science for Energy Meteorology

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IEEE International Conference on e-science and Grid Computing

作者： Wilhelm Hasselbring Detlev Heinemann Johannes Hurka Thomas Scheidsteger Ludger Bischofs Christoph Mayer Jan Ploski Guido Scherp Sina Lohmann Carsten Hoyer-Klick Thilo Erbertseder Gerhard Gesell Marion Schroedter-Homscheidt Gerd Heilscher Jochen Rehwinkel Stefan Rensberg Software Engineering Group Department of Computer Science University of Oldenburg Oldenburg Germany EHF Laboratory Department of Physics University of Oldenburg Oldenburg Germany Business Information Management OFFIS-Institute for Computer Science Oldenburg Germany German AeroSpace Centre (DLR) Institute of Atmospheric Physics Wessling Germany German AeroSpace Centre (DLR) Institute of Technical Thermodynamics Stuttgart Germany German Remote Sensing Data Center (DFD) German Aerospace Center Wessling Germany Meteocontrol GmbH Augsburg Germany

ISBN: (纸本)9781424430116

Our energy production increasingly depends on renewable energy sources, which impose new challenges for distributed and decentralized systems. One problem is that the availability of renewable energy sources such as wind and solar is not continuous as it is affected by meteorological factors. The challenge is to develop forecast methods capable of determining the level of power generation in near real-time in order to control power plants for optimal energy production. Another scenario is the identification of optimal locations for such power plants. In our collaborative project, these tasks are investigated in the domain of energy meteorology. For that purpose large data sources from many different sensors (e.g., satellites and ground stations) are the base for complex computations. The idea is to parallelize these computations in order to obtain significant speedup. This paper reports on an ongoing project employing Grid technologies in that context. Our approach to processing large data sets from a variety of heterogeneous data sources as well as ideas for parallel and distributed computing in energy meteorology are presented. Preliminary experience with several Grid middleware systems in our application scenario is discussed.

关键词： Meteorology Renewable energy resources Power generation Production systems Meteorological factors Wind forecasting Weather forecasting Load forecasting Solar power generation Wind energy generation

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A Study of Traffic Survivability Under Malicious Attacks

A Study of Traffic Survivability Under Malicious Attacks

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IEEE Sarnoff Symposium

作者： Yen-Hung Hu Mira Yun Debra Tang Hyeong-Ah Choi Department of Computer Science Hampton University Hampton VA USA Department of Computer Science George Washington University Washington D.C. DC USA Software Engineering Center U.S. Army Cecom Belvoir VA USA

ISBN: (纸本)9781424400027

As the Internet becomes more mature and a part of our daily life, the management of its resources to provide guaranteed services is crucial and beyond the capability of every individual network domain. How to maintain its continuous services in critical conditions is a challenge and would affect the design of next generation network infrastructure. In this paper, we study the survivability of normal traffics under the influences of flooding-based denial of service attacks and propose a potential framework which would reduce such influences. Our research increases the understanding of the behaviors of flooding-based DoS attacks and provides potential trends for developing better malicious attack mitigating solutions. By taking advantages of the survivability of specific flows, the potential mechanisms will not change or only slightly change current network infrastructure and be able to perform quality of service for several existing applications with no or little investment.

关键词： Telecommunication traffic Traffic control computer crime Protocols computer science IP networks Web and internet services software engineering computer network management Resource management

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A possibilistic petri-nets-based service matchmaker for multi-agents system architecture

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International Journal of Fuzzy Systems 2005年第4期7卷 199-213页

作者： Lee, Jonathan Wang, Yao-Chiang Wu, Chia-Ling Lee, Shin-Jie Ma, Shung-Pin Deng, Whan-Yo Department of Computer Science and Information Engineering National Central University Taoyuan 320 Taiwan Taiwan Taiwan Software Research Center NCU Taiwan Taiwan Software Engineering Association Taiwan IEEE Computer Society Taiwan ACM Taiwan Department of Computer Science and Information Engineering National Central University Taiwan

The focus of this paper is to devise a service-oriented architecture for multi-agents system (called SAM), to reach a wide adoption and routine use of agents, web services, and semantic web technologies. In order to better integrate agents, web applications and information sources in an open and distributed environment such as the Internet, a service matchmaker called middle agent is responsible for registering and spotting services in SAM. In the making of the service matchmaker there are four components involved: (1) a possibilistic Petri-nets (PPN) based service matchmaking mechanism for discovering services, (2) a service description language based on PPN for describing agent services and web services, (3) a set of ontologies for facilitating the semantic matchmaking, and (4) newly-defined extension mechanisms for bridging the linkage between web service standards and the service matchmaker through a translator.

关键词： Multi agent systems

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