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Evaluating multi-agent system architectures: A case study concerning dynamic resource allocation 3

3rd International Workshop on engineering Societies in the Agents World, ESAW 2002

作者： Davidsson, Paul Johansson, Stefan Department of Software Engineering and Computer Science Blekinge Institute of Technology Soft Center Ronneby372 25 Sweden

ISBN: (纸本)9783540140092

Much effort has been spent on suggesting and implementing new architectures of Multi-Agent Systems. However, we believe the time has come to compare and evaluate these architectures in a more systematic way. Rather than just studying a particular application, we suggest that more general problem domains corresponding to sets of applications should be studied. Similarly, we argue that it is more useful to study the properties of classes of multi-agent system architectures than particular architectures. Also, it is important to evaluate the architectures in several dimensions, both different performance-related attributes, which are domain dependent and more general quality attributes, such as, robustness, modifiability, and scalability. As a case study we investigate the general problem of "dynamic resource allocation" and present four classes of multi-agent system architectures that solve this problem. These classes are discriminated by their degree of distribution of control and degree of synchronization. Finally, we instantiate each of these architecture classes and evaluate, through simulation experiments, how they solve a concrete dynamic resource allocation problem, namely load balancing and overload control of Intelligent Networks. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Multi agent systems

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A framework for preventive state anticipation

A framework for preventive state anticipation

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作者： Davidsson, Paul Department of Software Engineering and Computer Science Blekinge Institute of Technology Soft Center 372 25 Ronneby Sweden

A special kind of anticipation is when an anticipated undesired situation makes an agent adapt its behavior in order to prevent that this situation will occur. In this chapter an approach is presented that combines low level reactive and high level deliberative reasoning in order to achieve this type of anticipatory behavior. A description of a general framework for preventive state anticipation is followed by a discussion of different possible instantiations. We focus on one such instantiation, linear anticipation, which is evaluated in a number of empirical experiments in both single- and multi-agent contexts. © Springer-Verlag Berlin Heidelberg 2003.

关键词： software agents

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A tool for understanding multi-language program dependencies 11

A tool for understanding multi-language program dependencies

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11th IEEE International Workshop on Program Comprehension, IWPC 2003

作者： Linos, P.K. Chen, Zhi-Hong Berrier, S. O'Rourke, B. Butler University Center for Applied Software Engineering Research Department of Computer Science and Software Engineering IndianapolisIN46208 United States

ISBN: (纸本)0769518834

This paper describes a prototype tool that facilitates the process of understanding and managing multi-language program dependencies. More specifically, the software tool maintains a repository of host-to-foreign language dependencies between C/C++ and Java code. We describe some program comprehension features of the tool and we discuss a preliminary case study performed in order to verify its functionality and validate its usefulness. Based on the results of this study, we continue improving the tool. © 2003 IEEE.

关键词： C++ (programming language)

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1/f^β noise-based real-time animation of trees swaying in wind fields

1/f<SUP>β</SUP> noise-based real-time animation of trees sw...

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computer Graphics International Conference (CGI 2003)

作者： Ota, S Fujimoto, T Tamura, M Muraoka, K Fujita, K Chiba, N Iwate Software Center Japan Computer Science Department Faculty of Engineering Iwate University Japan Department of Communications Engineering Tohoku Institute of Technology Japan

ISBN: (纸本)0769519466

Trees are one of the most important elements of natural landscapes. Therefore, in computer graphics, there is a great demand for methods to realize the natural representation of trees in virtual landscapes in various fields such as entertainment industry or environmental assessment in construction. Many studies have been made on techniques in which the shapes of trees are modeled but only a few studies have been reported on methods to incorporate the shapes with motions in a wind field. Most of these studies use physical simulation techniques based on the equations of motion to generate the branch motions and cannot realize the motions of individual leaves. In this paper, we propose a method to create the natural motions of individual leaves and branches swaying in a wind field. This method generates the leaf and branch motions based on "1/f(beta) noise", which is observed in various natural phenomena. For the branch motion, a simple simulation method based on the spring model is applied to enhance the realism of the motion. This method enables the real-time creation of the leaf and branch motions. Diverse motions according to tree species and shapes and wind conditions can be easily realized by controlling the parameters.

关键词： tree leaf motion wind 1/f(beta) noise real-time animation

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Dynamic test allocation model for software reliability 3

Dynamic test allocation model for software reliability

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3rd International Conference on Quality software, QSIC 2003

作者： Al-Maati, S.A. Rekab, K. Department of Computer Science State University of West Georgia CarrolltonGA30118 United States Center for Software Engineering Florida Institute of Technology MelbourneFL United States

ISBN: (纸本)0769520154

In any non trivial software system the reliability of the software cannot be determined exactly. Instead, we must apply statistical methods to create an estimate based on a sample of test cases. Our goal is, given a fixed total number of test cases, to determine how to allocate these test cases among the partitions of the software so as to minimize the variance incurred by the maximum likelihood estimator of the overall software reliability. In contrast to fixed sampling models, where the proportion of test cases taken from each partition is determined before reliability testing begins, we make allocation decisions dynamically throughout the testing process. We compare the results from the dynamic test allocation model with the optimal sampling model and demonstrate its strength with respect to the variance incurred when the overall system reliability is estimated by its maximum likelihood estimator both theoretically and through Monte Carlo simulations. © 2004 IEEE.

关键词： software reliability

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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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A tool for understanding multi-language program dependencies

A tool for understanding multi-language program dependencies

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IEEE Workshop on Program Comprehension

作者： P.K. Linos Zhi-hong Chen S. Berrier B. O'Rourke Center for Applied Software Engineering Research Department of Computer Science and Software Engineering Butler University Indianapolis IN USA

关键词： computer languages software engineering software tools software maintenance Java Application software Productivity LAN interconnection computer science software prototyping

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An optimization framework for dynamic, distributed real-time systems

An optimization framework for dynamic, distributed real-time...

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International Parallel and Distributed Processing Symposium, IPDPS 2003

作者： Ecker, Klaus Juedes, David Welch, Lonnie Chelberg, David Bruggeman, Carl Drews, Frank Fleeman, David Parrott, David Pfarr, Barbara Department of Computer Science Technical University of Clausthal Clausthal-Zellerfeld38678 Germany Center for Intelligent Distributed and Dependable Systems School of Electrical Engineering and Computer Science Ohio University AthensOH45701 United States Real-Time Software Engineering Branch NASA Goddard Space Flight Center BaltimoreMD20771 United States

ISBN: (纸本)0769519261

The paper presents a model that is useful for developing resource allocation algorithms for distributed real-time systems that operate in dynamic environments. Interesting aspects of the model include dynamic environments, utility and service levels, which provide a means for graceful degradation in resource-constrained situations and support optimization of the allocation of resources. The paper also provides an allocation algorithm that illustrates how to use the model for producing feasible, optimal resource allocations. © 2003 IEEE.

关键词： Constrained optimization

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Diagnosing architectural degeneration

Diagnosing architectural degeneration

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Annual IEEE/ NASA Goddard Workshop on software engineering

作者： L. Hochstein M. Lindvall Department of Computer Science University of Maryland USA Experimental Software Engineering Fraunhofer Center MD USA

software systems evolve over time and undergo changes that can lead to a degeneration of the systems' architecture. Degeneration may eventually reach a level where a complete redesign of the software system is necessary, which is a task that requires significant effort. In this paper, we start by presenting examples of such degeneration and continue with an analysis of technologies that can be used to diagnose degeneration. These technologies can be employed in identifying, degeneration so that it can be treated as early as possible, before it is too late and the system has to undergo a costly redesign.

关键词： computer architecture software systems software engineering Open source software Programming profession software maintenance computer science computer industry Delay Telecommunications

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Observational studies to accelerate process experience in classroom studies: an evaluation

Observational studies to accelerate process experience in cl...

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International Symposium on Empirical software engineering (ISESE)

作者： J. Carver F. Shull V. Basili Department of Computer Science University of Maryland USA Fraunhofer Center for Experimental Software Engineering MD USA

software engineering studies run in classroom environments can and have made important contributions to empirical software engineering. Because the goal of such studies is to improve the state of the practice in industry, researchers must understand and account for the differences between university students and industrial professionals. One major difference identified is the amount of training and practice that students and professional may have when learning a new technique. We propose and test a method of allowing university subjects to cost-effectively gain experience to compensate for this difference. The results show that the proposed method for gaining experience provided subjects with enough experience to improve their effectiveness in some but not all cases. There was also an indication from the results that the proposed method allowed the subjects to become more comfortable with a new technique.

关键词： Acceleration software engineering Industrial training Inspection computer science software quality Programming software measurement Testing Image analysis

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