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Collision-free communication in sensor networks

6th International Symposium on Self-Stabilizing Systems, SSS 2003

作者： Kulkarni, Sandeep S. Arumugam, Umamaheswaran Software Engineering and Networks Laboratory Department of Computer Science and Engineering Michigan State University East LansingMI48824 United States

ISBN: (纸本)3540404538

In this paper, we provide a stabilizing solution for collisionfree diffusion in sensor networks. Such diffusions are often necessary in sensor networks when information from one sensor needs to be communicated to other sensors that satisfy certain geographic properties. Our solution deals with several difficulties, e.g., unidirectional links, unreliable links, long links, failed sensors, and sensors that are sleeping in order to save energy, that occur in sensor networks. It also ensures that there are no collisions during the diffusion and that the time required for the diffusion is O(D) where D is the diameter of the network. Moreover, while the solution can be applied to an arbitrary topology, it is more suitable for a commonly occurring topology, a two-dimensional grid. We show how our solution for collision-free diffusion can be used for time-division multiplexing (TDM) in sensor networks. TDM ensures that the message communication (other than the messages sent by diffusion) among sensors is also collision-free. While collision-free diffusion and time-division multiplexing are interdependent, we show how both these properties can be achieved simultaneously. Our algorithms are stabilizing fault-tolerant, i.e., collision-free diffusion and time-division multiplexing are restored even if the system reaches an arbitrary state where the sensors are corrupted or improperly initialized. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Sensor networks

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Exploiting the marginal profits of constraints with evolutionary multi-objective optimization techniques

Exploiting the marginal profits of constraints with evolutio...

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Proceedings of the International Conference on Artificial Intelligence, IC-AI 2003

作者： Zhenyu, Yan Wei, Zhi Lishan, Kang Laboratory of Software Engineering Wuhan University Wuhan 430072 China Department of Computer Science Rutgers University Piscataway NJ 08854 United States

ISBN: (纸本)1932415122

Many real-world search and optimization problems naturally involve constraint handling. Recently, quite a few heuristic methods were proposed to solve the nonlinear constrained optimization problems. However, the constraint-handling approaches in these methods have some drawbacks. In this paper, we gave a Multi-objective optimization problem based (MOP-based) formula for constrained single-objective optimization problems. We proposed a way to solve them by using multi-objective evolutionary algorithms (MOEAs). By simulation experiments, we find this approach for constraint handling not only can find the constrained optimally, but also can provide the decision maker (DM) with a group of trade-off solutions with slightly constraint violation and meanwhile with substantial gain in the objective function. This can enable the DM to have more freedom to choose his preferred solution and therefore exploit more profits in the margin of constraint violations, where the constraint violations are small or acceptable.

关键词： Optimization

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Genetic programming-based decision trees for software quality classification

Genetic programming-based decision trees for software qualit...

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International Conference on Tools for Artificial Intelligence (ICTAI)

作者： T.M. Khoshgoftaar N. Seliya Yi Liu Empirical Software Engineering Laboratotry Department of Computer Science Engineering Florida Atlantic University Boca Raton FL USA

The knowledge of the likely problematic areas of a software system is very useful for improving its overall quality. Based on such information, a more focused software testing and inspection plan can be devised. Decision trees are attractive for a software quality classification problem which predicts the quality of program modules in terms of risk-based classes. They provide a comprehensible classification model which can be directly interpreted by observing the tree-structure. A simultaneous optimization of the classification accuracy and the size of the decision tree is a difficult problem, and very few studies have addressed the issue. This paper presents an automated and simplified genetic programming (gp) based decision tree modeling technique for the software quality classification problem. Genetic programming is ideally suited for problems that require optimization of multiple criteria. The proposed technique is based on multi-objective optimization using strongly typed GP. In the context of an industrial high-assurance software system, two fitness functions are used for the optimization problem: one for minimizing the average weighted cost of misclassification, and one for controlling the size of the decision tree. The classification performances of the GP-based decision trees are compared with those based on standard GP, i.e., S-expression tree. It is shown that the GP-based decision tree technique yielded better classification models. As compared to other decision tree-based methods, such as C4.5, GP-based decision trees are more flexible and can allow optimization of performance objectives other than accuracy. Moreover, it provides a practical solution for building models in the presence of conflicting objectives, which is commonly observed in software development practice.

关键词： Decision trees software quality Classification tree analysis Genetic programming software systems software testing Inspection computer industry Electrical equipment industry Industrial control

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Visual modeler for grid modeling and simulation (GridSim) toolkit

Visual modeler for grid modeling and simulation (GridSim) to...

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International Conference on Computational science, ICCS 2003

作者： Sulistio, Anthony Yeo, Chee Shin Buyya, Rajkumar Laboratory Department of Computer Science and Software Engineering The University of Melbourne ICT Building 111 Barry Street CarltonVIC3053 Australia

ISBN: (纸本)9783540401964

The Grid Modeling and Simulation (GridSim) toolkit provides a comprehensive facility for simulation of application scheduling in different Grid computing environments. However, using the GridSim toolkit to create a Grid simulation model can be a challenging task, especially when the user has no prior experience in using the toolkit before. This paper presents a Java-based Graphical User Interface (GUI) tool called Visual Modeler (VM) which is developed as an additional component on top of the GridSim toolkit. It aims to reduce the learning curve of users and enable fast creation of simulation models. The usefulness of VM is illustrated by a case study on simulating a Grid computing environment similar to that of the World-Wide Grid (WWG) testbed [1]. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Graphical user interfaces

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Modeling learning technology systems as business systems

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software & Systems Modeling 2003年第2期2卷 120-133页

作者： Paris Avgeriou Symeon Retalis Nikolaos Papaspyrou Department of Electrical and Computer Engineering Software Engineering Laboratory National Technical University of Athens Athens Greece Department of Computer Science University of Cyprus Nicosia Cyprus

The design of Learning Technology Systems, and the software Systems that support them, is largely conducted on an intuitive, ad hoc basis, thus resulting in inefficient systems that defectively support the learning process. There is now justifiable, increasing effort in formalizing the engineering of Learning Technology Systems in order to achieve better learning effectiveness as well as development efficiency. This paper presents such an approach for designing Learning Technology Systems and their most popular specialization, the Web-based Learning Systems, by modeling them as business systems, using business-modeling methods. The aim is to provide an in-depth analysis and comprehension of the Learning Technology Systems and Web-based Learning Systems’ domain, that can be used for improving the systems themselves, as well as for building the supporting software systems. Our work is based upon the Learning Technology Systems Architecture standard of IEEE LTSC, on the empirical results of designing Web-based Learning Systems for university courses and on the practices of the Rational Unified Process and the Unified Modeling Language.

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Design of a parser for real-time process algebra

Design of a parser for real-time process algebra

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Canadian Conference on Electrical and computer engineering (CCECE)

作者： Jianhua Zhao Yingxu Wang State Key Laboratory of Novel Software Technology Department of Computer Science and Technology University of Calgary Nanjing University Jiangsu China Theoretical and Empirical Software Engineering Research Centre Department of Electrical and Computer Engineering University of Calgary Calgary AB Canada

ISBN: (纸本)0780377818

The real-time process algebra (RTFA) is a set of new mathematical notations for formally describing software system architectures, and static and dynamic behaviors. To bring RTPA into industrial software development practice, tools are needed for analyzing and visualizing RTPA specifications. The first step to develop the supporting tools is to build a grammar parser for recognizing the RTPA notation system. In this paper, a parser of RTPA is described. The parser takes a textual RTPA specification as input, and generates an abstract syntax tree (AST) as its output. The generated AST represents RTPA tokens and lexical information in a structured format, which provides a foundation for further semantic analysis, code generation, visualization, and validation.

关键词： Algebra Real time systems computer architecture Java software engineering Visualization computer science Drives software systems computer industry

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A FRAMEWORK TO MEASURE CLASS COHESION

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Journal of Electronics(China) 2003年第1期20卷 69-73页

作者： Xu Baowen Chen Zhenqiang Zhou Yuming(department of computer science and engineering, Southeast University, Nanjing 210096) (State Key laboratory of software engineering, Wuhan University, Wuhan 430072) Department of Computer Science and Engineering Southeast University Nanjing State Key Laboratory of Software Engineering Wuhan University Wuhan

Classes are the basic modules in Object-Oriented (OO) software, which consist of attributes and methods. Thus, in OO environment, the cohesion is mainly about how tightly the attributes and methods of classes cohere with each other. This letter discusses the relationships between attributes and attributes, attributes and methods, methods and methods of a class,and the properties of these relationships. Based on these properties, the letter proposes a new framework to measure the cohesion of a class. The approach overcomes the limitations of previous class cohesion measures, which consider only one or two of the three relationships in a class.

关键词： Object-Orientation(OO) software measurement Dependence analysis Cohesion

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Architecture of the virtual training system for buoyancy control 03

Architecture of the virtual training system for buoyancy con...

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9th EUROGRAPHICS Workshop on Virtual Environments, EGVE 2003

作者： Korošec, Dean Slavinec, Mitja Bernad, Dani Kolarič, Primož Prnaver, Katja University of Maribor Faculty of Electrical Engineering and Computer Science System Software Laboratory Slovenia University of Maribor Faculty of Education Department of Physics Slovenia Regional Development Agency Mura Murska Sobota Slovenia

ISBN: (纸本)1581136862

In this paper we present the structure of the simulator which would allow diving beginners to experience the effect of buoyancy control mechanisms before actually entering the *** believe such training would be less stressful and safer for all participants, but it should also reduce the time in water needed to manage basic practical diving skills. Central design requirements for the system were: realistic modelling of diving physics, various options of man-machine interface and possibility of immersion. With future studies we plan to clarify to what extent the immersive VR interfaces are able to further improve the diving training experience. © 2003 The Eurographics Association.

关键词： E-learning

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Energy infrastructure survivability, inherent limitations, obstacles and mitigation strategies

Energy infrastructure survivability, inherent limitations, o...

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Proceedings of the IASTED International Conference, PowerCon 2003 - Special Theme: Blackout

作者： Sheldon, Frederick Potok, Tom Loebl, Andy Krings, Axel Oman, Paul Appl. Software Engineering Research Oak Ridge National Laboratory Oak Ridge TN 37831 United States Department of Computer Science University of Idaho Moscow ID 83844 United States

ISBN: (纸本)0889864004

The blackout of August 14, 2003 affected 8 states and fifty million people and could cost up to $5 billion2. Yet another press release claims it may have cost Ohio manufacturers $1.1 billion, based on a poll of 275 companies. Preliminary reports3 indicate the outage progressed as a chain of relatively minor events, rather than a single catastrophic failure. This is consistent with previous cascading outages, which were caused by a domino reaction4. The increasingly ubiquitous use of embedded systems to manage and control our technologically complex society makes our homeland security even more vulnerable. Therefore, knowing how vulnerable such systems are is essential to improving their intrinsic reliability/survivability (in a deregulated environment knowing these important properties is equally essential to the providers).

关键词： Systems analysis

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Data Mining: How Research Meets Practical Development?

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Knowledge and Information Systems 2003年第2期5卷 248-261页

作者： Wu, Xindong Yu, Philip S. Piatetsky-Shapiro, Gregory Cercone, Nick Lin, T.Y. Kotagiri, Ramamohanarao Wah, Benjamin W. Department of Computer Science University of Vermont BurlingtonVT United States IBM T. J. Watson Research Center HawthorneNY United States KDnuggets BrooklineMA United States School of Computer Science University of Waterloo WaterlooON Canada Department of Mathematics and Computer Science San Jose State University San JoseCA United States Department of Computer Science and Software Engineering University of Melbourne ParkvilleVIC Australia Computer Systems Research Laboratory University of Illinois Urbana-Champaign UrbanaIL United States Department of Computer Science Universityof Vermont BurlingtonVT05405 United States

At the 2001 IEEE International Conference on Data Mining in San Jose, California,on November 29 to December 2, 2001, there was a panel discussion on how datamining research meets practical development. One of the motivations for organizing thepanel discussion was to provide useful advice for industrial people to explore their directionsin data mining development. Based on the panel discussion, this paper presentsthe views and arguments from the panel members, the Conference Chair and the ProgramCommittee Co-Chairs. These people as a group have both academic and industrialexperiences in different data mining related areas such as databases, machine learning,and neural networks. We will answer questions such as (1) how far data mining is frompractical development, (2) how data mining research differs from practical development,and (3) what are the most promising areas in data mining for practical development. © 2003, Springer-Verlag London Limited.

关键词： Data mining

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