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1.
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3.
  • Abbas Ali, Syed (författare)
  • WCET Analysis and Certification of Automatically Generated Code for CC-Systems AB
  • 2007
  • Rapport (övrigt vetenskapligt)abstract
    • In industry, certification of safety critical computer system is aiming to improve and project the safety of critical systems by following standards of design, development and manufacturing with professional responsibility.In the process of attaining certification we come across with different issues from inception till decommissioning, like which standard or standards are available and fit for product. Is process based certification enough for assuring system performance/reliability? What about legacy systems and how to certify them? Does the use of automated tools and code generation affect the certification? Which non-functional properties are useful for certification? Last but not least how useful is WCET analysis for certification along with the legal aspects of certification on component supplier, and metric for reliability?A case study of bridge panelÇs subsystem has been considered to suggest the solution of the above issues using the standards IEC 61508 and IEC 60945. IEC 61508 is a generic standard, but for safety industryÇs own standard are recommended. The targeted Safety Integrity Level for this product is SIL level 2, with respect to the software requirement.Certification does not guarantee, but they increases the chance that the product developed using the standards will be a safer product. The regulatory body also needed to be credible as it plays an important role by determining conformance with the standard and detail of the system.
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4.
  • Abbaspour, Sara, et al. (författare)
  • Web Service Response Time Monitoring : Architecture and Validation
  • 2011
  • Ingår i: Communications in Computer and Information Science Volume 164 CCIS, 2011. - 9783642249983 ; s. 276-282
  • Konferensbidrag (refereegranskat)abstract
    • Web services are used in many Web applications in order to save time and cost during software development process. To peruse Web service response time, a suitable tool is needed to automate the measurement of the response time. However, not many suitable tools are available for automatic measurement of response time. This research is carried out in the context of quality of Web services in order to measure and visualize Web service response time. The method proposed in this research for accomplishing this goal is based on creating a proxy for connecting to the required Web service, and then calculating the Web services response time via the proxy. A software tool is designed based on the proposed method in order to guide the implementation that is still in progress. The tool can be validated through empirical validation using three test cases for three different Web service access situations.
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6.
  • Abdul-Ahad, Amir Stefan, et al. (författare)
  • Robust distance-based watermarking for digital image
  • 2008
  • Ingår i: Proceedings of the 2008 International Conference on Security and Management, SAM 2008. - 160132085X - 9781601320858 ; s. 404-409
  • Konferensbidrag (refereegranskat)abstract
    • In this paper, an algorithm is developed to invisibly watermark a cover object (color image) using watermark object (iconic image). The algorithm is based on the distances among the addresses of values of the cover object. These distances use to make the embedding. The order of manipulating these distances are specified by the values of the watermark data which is dealt with serially. The algorithm serves and achieves self encryption key. Each watermark object has its unique pattern of distances at different possible lengths of distance bits. This enhances the complexity of sequential embedding. The algorithm is tested using direct and single level and double level of Two-Dimensional Discrete Wavelet Transform (2D DWT) embeddings. Two important issues are addressed. Firstly is to achieve a high Peak Signal to Noise Ratio (PSNR). The ratio was found to increase with an increasing of distance bits. Secondly is that the watermarked object retains the same properties of cover object. The algorithm shows resisting and withstanding against the most important attacks. Some of these include the lossy compression, blurring, resize and some types of Noise.
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7.
  • Abdullah, Syed Md Jakaria, et al. (författare)
  • Towards Implementation of Virtual-Clustered Multiprocessor Scheduling in Linux
  • 2013
  • Ingår i: Proceedings of the 8th IEEE International Symposium on Industrial Embedded Systems, SIES 2013. - 9781479906581 ; s. 97-100
  • Konferensbidrag (refereegranskat)abstract
    • Cluster based multiprocessor scheduling can be seen as a hybrid approach combining benefits of both partitioned and global scheduling. Virtual clustering further enhances it by providing dynamic cluster resource allocation and applying hierarchical scheduling techniques. Over the years, the study of virtual cluster scheduling has been limited to theoretical analysis. In this paper, we present our initial ideas about implementing virtual cluster scheduling in Linux. The purpose of this implementation is twofold: (i) we would like to demonstrate the feasibility of its implementation in an operating system, without modifying the kernel source code, (ii) we present practical insights on the overhead of implementing this framework.
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8.
  • Abecassis-Moedas, Celine, et al. (författare)
  • Key resources and internationalization modes of creative knowledge-intensive business services : The case of design consultancies
  • 2012
  • Ingår i: Creativity and Innovation Management. - 0963-1690. ; 21:3, s. 315-331
  • Tidskriftsartikel (refereegranskat)abstract
    • In the knowledge economy, knowledge-intensive business services (KIBS) are a key driver for innovation and competitiveness. The internationalization of these businesses raises challenges given their specificities such as knowledge intensity, the importance of customer interaction and intimacy in service delivery. This paper focuses on design consultancies as a specific type of creative KIBS for which these characteristics are emphasized. The objective of this research is to analyse the resources leveraged by the firms to compete internationally. It is based on 11 case studies of design consultancies located in five different countries (France, Italy, Portugal, Spain and the UK) that were selected for their capacity to perform at the international level for several years. The paper advances three internationalization modes depending on contingent variables and focusing on specific resources that enable international competitiveness: star-based, process-based and glocality-based. In star-based creative KIBS, the individual designer has developed a reputation that attracts customers internationally, operating as a brand. In process-based creative KIBS, the reputation of a collective creative process attracts clients from other countries. In glocality-based creative KIBS, the geographical proximity obtained by opening international offices helps to develop a close understanding of the client through frequent interactions, and also to know the client's market well and to better understand local codes and signs. These modes complement those presented in the existing internationalization literature which takes the peculiarities of creative KIBS into consideration.
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9.
  • Abelli, Björn (författare)
  • Directing and Enacting the Information System
  • 2006
  • Ingår i: Proceedings of the 15th International Conference on Information System Development, 31 Aug - 2 Sep 2006, Budapest, Hungary..
  • Konferensbidrag (refereegranskat)
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10.
  • Abelli, Björn (författare)
  • Enacting the e-Society
  • 2006
  • Ingår i: Proceedings of the IADIS International Conference e-Society 2006, 13 - 16 July 2006, Dublin, Ireland.
  • Konferensbidrag (refereegranskat)
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