When transacting and interacting through open computer networks, traditional methods used in the physical world for establishing trust can no longer be used. Creating virtual network substitutes with which people, org...
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Middleware architectures play a crucial role in determining the overall quality of many distributed applications. Systematic evaluation methods for middleware architectures are therefore important to thoroughly assess...
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ISBN:
(纸本)9783540488194
Middleware architectures play a crucial role in determining the overall quality of many distributed applications. Systematic evaluation methods for middleware architectures are therefore important to thoroughly assess the impact of design decisions on quality goals. This paper presents MEMS, a scenario-based evaluation approach. MEMS provides a principled way of evaluating middleware architectures by leveraging generic qualitative and quantitative evaluation techniques such as prototyping, testing, rating, and analysis. It measures middleware architectures by rating multiple quality attributes, and the outputs aid the determination of the suitability of alternative middleware architectures to meet an application's quality goals. MEMS also benefits middleware development by uncovering potential problems at early stage, making it cheaper and quicker to fix design problems. The paper describes a case study to evaluate the security architecture of grid middleware architectures for managing secure conversations and access control. The results demonstrate the practical utility of MENIS for evaluating middleware architectures for multiple quality attributes.
For a large scale of software development, there is a tremendous number of software requirements documents in a collection which may be produced for different domains by different developer teams. They may be later re...
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For a large scale of software development, there is a tremendous number of software requirements documents in a collection which may be produced for different domains by different developer teams. They may be later reused to reduce cost and time for the next development. Thus, there is a need to retrieve ones that meet user's need efficiently. This paper presents an approach for software requirements specification retrieval in a form of use case description using use case structure and similarity computation between terms of use case query and use cases in the collection. The contribution of the paper has five main points; 1) the approach for retrieving use case description is proposed, 2) the developed tool supporting the approach is presented, 3) the experiment is designed to measure effectiveness of the approach, 4) the results of the experiment are shown to compare effectiveness of the approach to that of a general approach, and finally 5) the recommended use case description query template is proposed.
H.264 is the new multimedia compression standard developed by VCEG and MPEG. In order to maximize the compression performance, H.264 adopts RDO mode decision techniques at the cost of very remarkable computational com...
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The aim of this paper is to introduce a new approach which describes an automatic transformation process of electronic flat documents (HTML document for example), into reusable learning objects. Thus, the transformed ...
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The aim of this paper is to introduce a new approach which describes an automatic transformation process of electronic flat documents (HTML document for example), into reusable learning objects. Thus, the transformed content can be integrated, within management learning system. Our methodology proposes, firstly, a syntactical transformation of a flat electronic document into well-structured document. It tends secondly, to perform a semantic categorization of each piece of the content into an equivalent type of reusable learning object (Ajami, 2004). Such a semantic categorization is based on the construction of artificial neural networks
Analyses of Contourlet coefficients indicate that inter-scale Contourlet coefficients with respect to signals are highly correlated while the correlations associated with white noise are less or even do not exist. Acc...
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Analyses of Contourlet coefficients indicate that inter-scale Contourlet coefficients with respect to signals are highly correlated while the correlations associated with white noise are less or even do not exist. According to the property, an image denoising algorithm based on inter-scale correlations of Contourlet coefficients is proposed combined with threshold functions. Experimental results show that the proposed method outperforms the corresponding wavelet method in terms of both peak-signal-to-noise (PSNR) and visual quality, and it is especially adequate to the images with much texture.
Web applications exhibit dynamic behaviour through such features as animation, rapidly changing presentations, and interactive forms. The growing complexity of web applications requires a rigorous modelling approach c...
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Testing plays an important role in the maintenance of Component Based software Development. Test adequacy for component testing is one of the hardest issues for component testing. To tackle this problem, it is a natur...
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