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A user-oriented reliability modelling approach for web systems

International Journal of Web Engineering and Technology 2007年第3期3卷 288-306页

作者： Wang, Wen-Li Hemminger, Thomas L. Tang, Mei-Huei School of Engineering Behrend College Erie Penn. State University Erie PA 16563 United States Computer and Information Science Department Gannon University Erie PA 16541 United States Programme of Electrical Computer and Software Engineering Pennsylvania State University Behrend College United States Pennsylvania State University Behrend College United States Computer and Information Science Department Gannon University United States

In this paper, we describe a user-oriented reliability model that addresses extensive web content, including many links, and that simultaneously addresses user dynamic navigation behaviour. Computation time is a problem in web systems because content can be tightly coupled. An alternative approach is to skip the consideration of the actual dynamic relationships but this is undesirable because the quality of a web system is bound to the success of a series of user navigations. These issues motivate our study from a user perspective. By parsing the logs, past navigations can be restored to form a flow graph. Our model adopts the idea of cyclomatic complexity to convert the graph to a maximum number of independent paths so that reliability can be computed by discounting the probabilities of unreliable paths. The application of this model can prioritise the fault removal sequence to assist in resource and effort allocation to improve reliability. Copyright © 2007 Inderscience Enterprises Ltd.

关键词： Web services

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An immune systems approach for classifying mobile phone usage

An immune systems approach for classifying mobile phone usag...

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作者： Limanto, Hanny Yulius Cing, Tay Joc Watkins, Andrew Nanyang Technological University Singapore Singapore Nanyang Technological University Singapore Singapore Department of Undergraduate Studies Department of Computer Science and Engineering Mississipi State University Oxford MS United States Evolutionary and Complex Systems Programme

With the recent introduction of third generation (3G) technology in the field of mobile communications, mobile phone service providers will have to find an effective strategy to market this new technology. One approach is to analyze the current profile of existing 3G subscribers to discover common patterns in their usage of mobile phones. With these usage patterns, the service provider can effectively target certain classes of customers who are more likely to purchase their subscription plans. To discover these patterns, we use a novel algorithm called Artficial Immune Recognition System (AIRS) that is based on the specificity of the human immune system. In our experiment, the algorithm performs well, achieving an accuracy rate in the range of 80% to 90%, depending on the set of parameter values used. Copyright © 2007, Idea Group Inc.

关键词： Data mining

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Providing “real-world” software engineering experience in an academic setting

Providing “real-world” software engineering experience in ...

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Frontiers in Education (FIE) Conference

作者： Deepti Suri Department of Electrical Engineering and Computer Science Milwaukee School of Engineering Software Engineering Programme Milwaukee WI USA

At Milwaukee School of Engineering, the Software Development Laboratory was created with a vision of providing "real-life" software development experience to software engineering student teams. It provides students an opportunity to unite theory and practice while working on large scale ongoing projects in the context of a standardized development process. This paper provides details on how the lab is currently structured, its pedagogical philosophy, its challenges, its rewards and how it has evolved since its inception.

关键词： Software engineering Programming Capability maturity model Laboratories Quality management Large-scale systems Continuing education Communication industry Business communication Reverse engineering

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Tree formation algorithm for data aggregation based on estimate cost in sensor networks

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2007年第5期35卷 806-810页

作者： Ye, Ning Wang, Ru-Chuan College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Department of Information Science Nanjing College for Population Programme Management Nanjing 210042 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China

Wireless sensor network is a novel technology, and can be applied to both abominable and military environments. During gathering the data, wireless sensor network should decrease the power costs of redundancy information and delay time. The technology of data aggregation can be adopted. A tree formation algorithm for data aggregation based on estimate cost is presented. The paper applies directed transmission model and message route mechanism. The idea of this algorithm is optimization of data aggregation route by estimate cost about energy, distant and aggregation gain, then realizes data aggregation trade-off in energy and delay.

关键词： Wireless sensor networks

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The Best Interval Representation of Fuzzy S-Implications and Automorphisms

The Best Interval Representation of Fuzzy S-Implications and...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Benjamin C. Bedregal Regivan H. N. Santiago Renata H. S. Reiser Gracaliz P. Dimuro Department of Informatics and Applied Mathematics Federal University of Rio Grande do Norte Natal Rio Grande do Norte Brazil Graduate Programme in Computer Science Catholic University of Pelotas Pelotas Rio Grande do Sul Brazil

The aim of this work is to analyze interval fuzzy S-implications and interval automorphisms. Starting from any fuzzy S-implication, it is shown how to obtain an interval fuzzy S-implication canonically. We proved that such interval fuzzy S-implications meet the optimality property and preserve the same properties satisfied by fuzzy S-implications. In addition, commutative diagrams are used in order to relate fuzzy S-implications to interval fuzzy S-implications, and to understand how interval automorphisms act on interval S-implications, generating other interval fuzzy S-implications.

关键词： Fuzzy logic Uncertainty Mathematics Fuzzy sets Fuzzy set theory Fuzzy control Control systems Humans Accuracy Optimal control

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Towards building an experiential music visualizer

Towards building an experiential music visualizer

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International Conference on Information, Communications and Signal Processing

作者： Suranga Chandima Nanayakkara Elizabeth Taylor Lonce Wyse S.H. Ong Marine Mammal Research Laboratory Tropical Marine Science Institute National University of Singapore Singapore Communications and New Media Programme Faculty of Arts and Social Sciences National University of Singapore Singapore Department of Electrical and Computer Engineering Division of Bioengineering National University of Singapore Singapore

ISBN: (纸本)9781424409822

There have been many attempts to represent music using a wide variety of different music visualisation schemes. In this paper, we propose a novel system architecture which combines Max/MSPtrade with Flashtrade that can be used to build real-time music visualisations rapidly. In addition, we have used this proposed architecture to develop a music visualisation scheme that uses individual notes from a MIDI keyboard or from a standard MIDI file and creates novel displays that reflect pitch, note duration, characteristics such as how hard a key is struck, and which instruments are playing at any one time. The proposed music visualization scheme is a first step towards developing a music visualization that alone can provide a sense of musical experience to the user.

关键词： Visualization Music Instruments Art Data mining Real time systems Streaming media Displays Laboratories Biomedical engineering

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Erasure codes for increasing the availability of grid data storage

Erasure codes for increasing the availability of grid data s...

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Advanced International Conference on Telecommunications andInternational Conference on Internet and Web Applications and Services, AICT/ICIW'06

作者： Pitkanen, Mikko Moussa, Rim Swany, Martin Niemi, Tapio Helsinki Institute Physics Technology Programme ISSAT Universite 7 Nov de Carbage Department of Computer Science University of Delaware Dept. of Computer and Info. Sciences

ISBN: (纸本)0769525229

In this paper, we describe the design of a highly-available Grid data storage system. Increased availability is ensured by data redundancy and file striping. Redundant data is computed using Reed-Solomon (RS) codes. The level of availability can be chosen for each individual file. Storage overhead is minimal compared to traditional redundancy strategies based on complete replication. Our prototype uses existing Grid data management tools (GridFTP) for communication, and the RS encoding and decoding is embedded in the client software. Performance measurements in wide area network prove the efficiency of our design for high-availability and striped file transfers. © 2006 IEEE.

关键词： Codes (symbols)

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Erasure Codes for Increasing the Availability of Grid Data Storage

Erasure Codes for Increasing the Availability of Grid Data S...

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Advanced International Conference on Telecommunications (AICT)

作者： M. Pitkanen R. Moussa M. Swany T. Niemi Technology Programme Helsinki Institute of Physics Finland Department of Computer Science Universite 7 Nov de Carthage Tunisia Department of Computer and Information Sciences University of Delaware USA Technology Programme Helsinki Institute of Physics Switzerland

In this paper, we describe the design of a highlyavailable Grid data storage system. Increased availability is ensured by data redundancy and file striping. Redundant data is computed using Reed-Solomon (RS) codes. The level of availability can be chosen for each individual file. Storage overhead is minimal compared to traditional redundancy strategies based on complete replication. Our prototype uses existing Grid data management tools (GridFTP) for communication, and the RS encoding and decoding is embedded in the client software. Performance measurements in wide area network prove the efficiency of our design for high-availability and striped file transfers.

关键词： Memory Data storage systems Reed-Solomon codes Availability Software prototyping Encoding Decoding Embedded software Software tools Measurement

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Analyzing properties of fuzzy implications obtained via the interval constructor

Analyzing properties of fuzzy implications obtained via the ...

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12th GAMM-IMACS International Symposium on Scientific Computing, computer Arithmetic and Validated Numerics, SCAN 2006

作者： Bedregal, Benjamin C. Santiago, Regivan H. N. Reiser, Renata H. S. Dimuro, Graçaliz P. Federal University of Rio Grande do Norte Department of Informatics and Applied Mathematics Campus Universitário s/n 59.072-970 Natal Brazil Catholic University of Pelotas Pos-Graduate Programme in Computer Science Rua Feliz da Cunha 412 96.010-000 Pelotas Brazil

ISBN: (纸本)076952821X

This work considers an interval extension of fuzzy implications based on the best interval representation of usual fuzzy implications. The related properties of fuzzy implications can be naturally extended and the interval representation meets the optimality property and preserves the behaviors of the implications in the interval endpoints. Our discussion mainly focuses on the best interval representation of three important classes of fuzzy implications: S-implications, R-implications and QL-implications. We analyze sufficient and necessary conditions for these three classes of implications as inclusion-monotonic functions in both arguments satisfying the minimal properties of fuzzy implications.

关键词： Fuzzy inference

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Analyzing Properties of Fuzzy Implications Obtained via the Interval Constructor

Analyzing Properties of Fuzzy Implications Obtained via the ...

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International Symposium on Scientific Computing, computer Arithmetic and Validated Numerics (SCAN)

作者： B.C. Bedregal R.H.N. Santiago R.H.S. Reiser G.P. Dimuro Department of Informatics and Applied Mathematics Federal University of Rio Grande do Norte Natal Brazil Pos-Graduate Programme in Computer Science Catholic University of Pelotas Pelotas Brazil

ISBN: (纸本)9781424431410

关键词： Mathematics Fuzzy logic Fuzzy control Informatics computer science Natural languages Multivalued logic Fuzzy sets Uncertainty

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