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Online ISSN 1751-8814 Print ISSN 1751-8806

IET Software

Volume 5, Issue 5, October 2011

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Volume 5, Issue 5

October 2011

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    • Dynamic slicing of distributed object-oriented programs
      • Author(s): S.S. Barpanda  and  D.P. Mohapatra
      • Source: IET Software, Volume 5, Issue 5, p. 425 –433
      • DOI:  10.1049/iet-sen.2010.0141
      • Type: Article
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      • p. 425 –433 (9)
        Program slicing is a decomposition technique that deals with extracting those statements relevant to a particular computation. The authors propose a novel algorithm for computing dynamic slice of distributed object-oriented programs. The proposed algorithm incorporates graph colouring strategy to compute slice. But to achieve the goal efficiently, the authors have contradicted some key constraints of the traditional graph colouring technique. The state restriction of the slicing criterion is also considered along with dependence analysis while computing slice. The advantage of the proposed algorithm is that it is efficient and faster than the existing algorithms.
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      Investigation on performance testing and evaluation of PReWebN: a Java technique for implementing web application
      • Author(s): M. Kalita ; S. Khanikar ; T. Bezboruah
      • Source: IET Software, Volume 5, Issue 5, p. 434 –444
      • DOI:  10.1049/iet-sen.2011.0030
      • Type: Article
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      • p. 434 –444 (11)
        Performance testing of web application is essential from the perspective of users as well as developers, since it directly reflects the behaviour of the application. As such the authors have developed a prototype research web application based on Java technique to study the performance and to evaluate the technique used for developing the web application. The application is called as PReWebN (prototype research web application in netbeans platform). Load and stress testing have been carried out on PReWebN using Mercury LoadRunner to study the performance, stability, scalability, reliability, efficiency and cost effectiveness of the technique. The performance depends on metrics such as hits/s, response time, throughput, errors/s and transaction summary. These metrics for the application are tested with different stress levels. The statistical testing on the recorded data has been carried out to study the stability and quality of the application. The present study reveals that the web application developed with Java technique is more stable, reliable, scalable and cost effective than its other counterpart such as Microsoft .NET technology. The authors present the architecture, testing procedure, results of performance testing as well as the results of statistical testing on recorded data of PReWebN.
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      Alleviating information overload caused by volumes of numerical web data: the concept and development process
      • Author(s): S.-C. Hu  and  I.-C. Chen
      • Source: IET Software, Volume 5, Issue 5, p. 445 –453
      • DOI:  10.1049/iet-sen.2010.0099
      • Type: Article
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      • p. 445 –453 (9)
        The really simple syndication (RSS), a popular information dissemination mechanism, to some extent, eases the overloaded users on the Web. However, because of the limitation in its original design, currently available RSS applications cannot salvage overloaded information consumers from volumes of numerical Web data. The present work aims to change the working pattern of users who rely on processing numerical Web data to accomplish their tasks and correspondingly to improve their productivity. An extended schema was developed for formally representing numerical data items in RSS documents, and thus data providers can distribute numerical data and textual messages to subscribers. A client-side productive tool was designed to support retrieval and manipulation of numerical data from RSS feeds, its prototype was developed to realise the proposed idea and demonstrate its usefulness. Based on the observation of actual usage, the foreseeable effect of this kind of applications is reducing users’ time spent on surfing, collecting, calculating and tracking numerical data on the Web. To make the present work more versatile and serve diverse users, it is rational to augment the prototyped tool as a general-purpose computing platform.
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      Web-based decision-support system methodology for smart provision of adaptive digital energy services over cloud technologies
      • Author(s): V. Nikolopoulos ; G. Mpardis ; I. Giannoukos ; I. Lykourentzou ; V. Loumos
      • Source: IET Software, Volume 5, Issue 5, p. 454 –465
      • DOI:  10.1049/iet-sen.2010.0008
      • Type: Article
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      • p. 454 –465 (12)
        Energy information systems, which manage energy consumptions over internet, have been evolving over the past decade and can be considered as a part of a specialised sequential decision process, regarding the provision of personalised energy services to the community. The aim of this study is to develop and present an innovative decision-support system and cloud computing software methodology that brings together energy consultants, consumers, energy services procedures and modern web interoperable technologies. The authors propose a web-based knowledge system, using distributed cloud architecture and metering grids over ADSL broadband connections. By using some clustering algorithms and a web middleware, energy profiles over time are analysed and observed. The resulting clusters and centroids are projected and statistically analysed over time, producing a centroid-locus. Hypercube topology was used for efficient data management and software agent-based parallel analysis. The system operates efficiently on a multi-tier cloud-based middleware that generates in real-time using various service software components to the end consumers. The case study on real Greek energy measurements, for the first time in Greece, indicated a compact and efficient distributed procedure that could analyse and produce adaptive personalised information services.
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      Reputation measure approach of web service for service selection
      • Author(s): S. Wang ; Q. Sun ; H. Zou ; F. Yang
      • Source: IET Software, Volume 5, Issue 5, p. 466 –473
      • DOI:  10.1049/iet-sen.2010.0077
      • Type: Article
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      • p. 466 –473 (8)
        In choosing web services with quality of service (QoS), the reputation attribute of QoS is very important for users to obtain reliable services in service selection. However, existing approaches rely on feedback ratings, which usually lead to the subjectivity and unfairness of reputation measure. The authors propose a reputation measure approach for web services. The approach employs three phases (i.e. feedback checking, feedback adjustment and malicious feedback detection) to enhance the reputation measure accuracy. A user survey form was first established to check the feedback ratings from these users who are lacking in feedback ability. Then the feedback ratings are adjusted with different user feedback preferences by calculating feedback similarity. Finally, the authors detect malicious feedback ratings by adopting cumulative sum method. Simulation results show that the proposed approach is effective and can greatly improve service selection process in service-oriented business applications.
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      Framework for component model selection
      • Author(s): H. Aris  and  S.S. Salim
      • Source: IET Software, Volume 5, Issue 5, p. 474 –486
      • DOI:  10.1049/iet-sen.2010.0111
      • Type: Article
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      • p. 474 –486 (13)
        Advances in component-oriented software development research have led, among others, to the birth of a large number of component models, which has caused difficulties to the software developers in selecting the suitable component models to be used. To overcome the difficulties, a framework for component model selection is proposed in this study. The framework allows software developer to specify the criteria of the component model that they would like to use and recommends the component model(s) that fits most of the criteria. An application of the framework shows that it has the potential to be used by the software developers in determining the suitable component models.
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