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8th International Conference on software Reuse, ICSR 2004

作者： Gomaa, Hassan Shin, Michael E. Dept. of Information and Software Engineering George Mason University FairfaxVA22030-4444 United States Dept. of Computer Science Texas Tech University Lubbock79409-3104 United States

ISBN: (纸本)9783540277996

This paper describes a multiple-view meta-modeling approach for managing variability in software product lines using the Unified Modeling Language notation (UML). A multiple-view meta-model for software product lines describes how each view relates semantically to other views. The metamodel depicts life cycle phases, views within each phase, and meta-classes within each view. The relationships between the meta-classes in the different views are described. Consistency checking rules are defined based on the relationships among the meta-classes in the meta-model. This paper briefly describes multiple-view modeling of software product lines before describing the multiple-view meta-modeling approach for software product lines and an approach for consistency checking between meta-model views. The paper then provides a detailed description of the tool support for product line multipleview meta-modeling, meta-model consistency checking, and product line member configuration from the product line architecture. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Unified Modeling Language

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THEMIS: Threat evaluation metamodel for information systems

THEMIS: Threat evaluation metamodel for information systems

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2nd Symposium on Intelligence and Security Informatics, ISI 2004

作者： Farkas, Csilla Wingfield, Thomas C. Michael, James B. Wijesekera, Duminda Dept. of Computer Science and Engineering USC ColumbiaSC29208 United States The Potomac Institute for Policy Studies ArlingtonVA22203 United States Dept. of Computer Science Naval Postgraduate School MontereyCA93943 United States Dept. of Information and Software Engineering GMU FairfaxVA22030 United States

ISBN: (纸本)9783540221258

THEMIS (Threat Evaluation Metamodel for Information Systems) is a description logic-based framework to apply state, federal, and international law to reason about the intent of computer network attacks with respect to collateral consequences. It can be used by law enforcement agencies and prosecutors to build legally credible arguments, and by network designers to keep their defensive and retaliatory measures within lawful limits. THEMIS automates known quantitative measures of characterizing attacks, weighs their potential impact, and places them in appropriate legal compartments. From the perspective of computer networks, we develop representations and a way to reason about the non-network related consequences of complex attacks from their atomic counterparts. From the perspective of law, we propose the development of interoperable ontologies and rules that represent concepts and restrictions of heterogeneous legal domains. The two perspectives are woven together in THEMIS using description logic to reason about and guide defensive, offensive, and prosecutorial actions. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Information systems

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A Distributed Locking Protocol

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2004年 3314卷 225-230页

作者： No, Jaechun Park, Sung Soon Dept. of Computer Software College of Electronics and Information Engineering Sejong University Seoul Korea Republic of Dept. of Computer Science and Engineering College of Science and Engineering Anyang University Anyang Korea Republic of

Concurrent accesses to a file frequently occur in a distributed computing environment where a few number of network-attached servers are designated as a data storage pool and the clients are physically connected to the servers via network, like GigaEthernet or Fibre Channel. In such a distributed computing environment, one of the major issues affecting in achieving substantial I/O performance and scalability is to build an efficient locking protocol. We present a distributed locking protocol that enables multiple client nodes to simultaneously write their data to distinct data portions of a file, while providing the consistent view of client cached data, and conclude with an evaluation of the performance of our locking protocol on a Linux cluster. © Springer-Verlag 2004.

关键词： Digital storage

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Reducing spike train variability: a computational theory of spike-timing dependent plasticity 04

Reducing spike train variability: a computational theory of ...

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Proceedings of the 17th International Conference on Neural Information Processing Systems

作者： Sander M. Bohte Michael C. Mozer Dept. Software Engineering CWI Amsterdam The Netherlands and Dept. of Computer Science University of Colorado Boulder Dept. of Computer Science University of Colorado Boulder

Experimental studies have observed synaptic potentiation when a presynaptic neuron fires shortly before a postsynaptic neuron, and synaptic depression when the presynaptic neuron fires shortly after. The dependence of synaptic modulation on the precise timing of the two action potentials is known as spike-timing dependent plasticity or STDP. We derive STDP from a simple computational principle: synapses adapt so as to minimize the postsynaptic neuron's variability to a given presynaptic input, causing the neuron's output to become more reliable in the face of noise. Using an entropy-minimization objective function and the biophysically realistic spike-response model of Gerstner (2001), we simulate neurophysiological experiments and obtain the characteristic STDP curve along with other phenomena including the reduction in synaptic plasticity as synaptic efficacy increases. We compare our account to other efforts to derive STDP from computational principles, and argue that our account provides the most comprehensive coverage of the phenomena. Thus, reliability of neural response in the face of noise may be a key goal of cortical adaptation.

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Performance of optical flow techniques for indoor navigation with a mobile robot

Performance of optical flow techniques for indoor navigation...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： C. McCarthy N. Bames Dept. Computer Science & Software Engineering The University of Melbourne Parkville VIC AUSTRALIA

We present a comparison of four optical flow methods and three spatio-temporal filters for mobile robot navigation in corridor-like environments. Previous comparisons of optical flow methods have evaluated performance only in terms of accuracy and/or efficiency, and typically in isolation. These comparisons are inadequate for addressing applicability to continuous, real-time operation as part of a robot control loop. We emphasise the need for comparisons that consider the context of a system, and that are confirmed by in-system results. To this end, we give results for on and off-board trials of two biologically inspired behaviours: corridor centring and visual odometry. Our results show the best in-system performances are achieved using Lucas and Kanade's gradient-based method in combination with a recursive temporal filter. Results for traditionally used Gaussian filters indicate that long latencies significantly impede performance for real-time tasks in the control loop.

关键词： Image motion analysis Navigation Mobile robots Optical filters Biomedical optical imaging Optical sensors Image sequences computer science software engineering Australia

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A complexity measure for Ontology based on UML

A complexity measure for Ontology based on UML

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Proceedings - 10th IEEE International Workshop on Future Trends of Distributed Computing Systems

作者： Kang, Dazhou Xu, Baowen Lu, Jianjiang Chu, William C. Dept. of Comp. Sci. and Engineering Southeast University Nanjing 210096 China Jiangsu Inst. of Software Quality Nanjing 210096 China State Key Laboratory of Software Wuhan University Wuhan 430072 China Department of Computer Science TungHai University Taiwan

ISBN: (纸本)0769521185

UML is a good tool to represent ontologies. When using UML for Ontology development, one of the principal goals is to assure the quality of ontologies. UML class diagrams provide a static modeling capability that is well suited for representing ontologies, so the structural complexity of a UML class diagram is one of the most important measures to evaluate the quality of the ontologies. This paper uses weighted class dependence graphs to represent a given class diagrams, and then presents a structure complexity measure for the UML class diagrams based on entropy distance. It considers complexity of both classes and relationships between the classes, and presents rules for transforming complexity value of classes and different lands of relations into a weighted class dependence graphs. This method can measure the structure complexity of class diagrams objectively.

关键词： computer programming languages

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An adaptive security model for heterogeneous networks using MAUT and simple heuristics

An adaptive security model for heterogeneous networks using ...

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International Conference on Computational Science and its Applications, ICCSA 2004

作者： Chae, Jongwoo Mostéfaoui, Ghita Kouadri Chung, Mokdong Dept. of Computer Engineering Pukyong National University 599-1 Daeyeon-3Dong Nam-Gu Busan Korea Republic of Software Engineering Group University of Fribourg Rue Faucigny 2 FribourgCH-1700 Switzerland

ISBN: (纸本)3540220607

In this paper, we present an adaptive security model that aims at securing resources in heterogeneous networks. Traditional security model usually work according to a static decision-making approach. However, we may establish a better approach to heterogeneous networks if we use a dynamic approach to construct the security level. Security management relies on a set of contextual information collected from the user and the resource environments, and that infers the security level to enforce. These security levels are dynamically deduced using one of these two algorithms: MAUT and Simple Heuristics. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Heterogeneous networks

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Configuring real-time aspects in component middleware

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On the Move to Meaningful Internet Systems 2004: International Conference on Cooperative Information Systems, CoopIS 2004, International Conference on Distributed Objects and Applications, DOA 2004 and International Conference on Ontologies, Databases and Applications of Semantics, ODBASE 2004

作者： Wang, Nanbor Gill, Chris Schmidt, Douglas C. Subramonian, Venkita Tech-X Corp Boulder United States Dept. of Computer Science and Engineering Washington University St. Louis United States Institute for Software Integrated Systems Vanderbilt University Nashville United States

ISBN: (纸本)3540236627

This paper makes two contributions to the study of configuring real-time aspects into quality of service (QoS)-enabled component middleware for distributed real-time and embedded (DRE) systems. First, it compares and contrasts the integration of real-time aspects into DRE systems using conventional QoS-enabled distributed object computing (DOC) middleware versus QoS-enabled component middleware. Second, it presents experiments that evaluate real-time aspects configuredin The ACE ORB (TAO) versus in the Component-Integrated ACE ORB (CIAO). Our results show that QoS-enabled componentmiddleware can offer real-time performance that is comparable to DOCmiddleware, while giving greater flexibility to compose and configure key DRE system aspects. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Quality of service

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Service selection in dynamic demand-driven Web services

Service selection in dynamic demand-driven Web services

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Proceedings - IEEE International Conference on Web Services

作者： Wang, Xiaoling Yue, Kun Huang, Joshua Zhexue Zhou, Aoying Dept. of Comp. Sci. and Engineering Fudan University ShangHai 200433 China E-Business Technology Institute University of Hong Kong Hong Kong Hong Kong Laboratory of Computer Science Institute of Software Chinese Academy of Science China

ISBN: (纸本)0769521673

Recently, Web services have become a new technology trend for Enterprise Application Integration (EAI) and more and more applications based on Web services are emerging. One of the problems in using Web services in business applications such as logistics is services composition automatically and efficiently. In this paper, we present a Dynamic, Demand-Driven Web services Engine called D3D-Serv to implement composite service functionality that is used to dynamically build composite services from existing services according to different business logics and requirements. In this D3D_Serv framework, the most challenging function to implement is dynamic selection of service providers at run time. The highly dynamic and distributed nature of Web services often makes some service providers overloaded at certain times while others idle. To solve this problem, we propose an efficient services selection and execution strategy that is based on the queuing theory and can provide guarantees for the QOS (Quality of Service) under provider's limited resources. Preliminary experimental results have shown that this algorithm is effective.

关键词： World Wide Web

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Vulnerability analysis of AIS-based intrusion detection systems via genetic and particle swarm red teams

Vulnerability analysis of AIS-based intrusion detection syst...

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Congress on Evolutionary Computation

作者： G. Dozier D. Brown J. Hurley K. Cain Dept. of computer Science & Software Engineering Auburn University AL Dept. of Computer Science Clark-Atlanta University Atlanta GA USA Boeing Aerospace Company Seattle WA USA

Artificial immune systems (AISs) are biologically inspired problem solvers that have been used successfully as intrusion detection systems (IDSs). In this paper we compare a genetic hacker with 12 evolutionary hackers based on particle swarm optimization (PSO) that have been effectively used as vulnerability analyzers (red teams) for AIS-based IDSs. Our results show that the PSO-based red teams that use Clerc's constriction coefficient outperform those that do not. Our results also show that the three types of red teams (genetic, basic PSO, and PSO with the constriction coefficient) have distinct search behaviors that are complimentary. This result suggests that red teams based on genetic swarms may hold the most promise.

关键词： Intrusion detection Genetics Particle swarm optimization Detectors computer hacking Telecommunication traffic computer science Artificial immune systems software Statistical analysis

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