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IEEE International Symposium on Information Theory

作者： Luis Javier García Villalba José René Fuentes Cortez Ana Lucila Sandoval Orozco Mario Blaum Group of Analysis Security and Systems (GASS) Department of Software Engineering and Artificial Intelligence (DISIA) School of Computer Science Universidad Complutense de Madrid Madrid Spain IBM Almaden Research Center San Jose CA USA

ISBN: (纸本)9781457705960

In a previous work [5] it was shown that the best measure for the efficiency of a single burst-correcting code is obtained using the Gallager bound as opposed to the Reiger bound. In this paper, an algorithm that optimizes the search for the best (shortened) cyclic burst-correcting codes is presented. The use of Gray codes in the algorithm optimizes the search, in the sense that no repeated syndromes are computed.

关键词： Polynomials Generators Reflective binary codes Systematics Block codes computers

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A Virtualization Approach to Auto-Scaling Problem

A Virtualization Approach to Auto-Scaling Problem

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International Conference on Information Technology: New Generations (ITNG)

作者： Theera Thepparat Amnart Harnprasarnkit Douanghatai Thippayawong Veera Boonjing Pisit Chanvarasuth Software Systems Engineering Laboratory.Department of Computer Science Faculty of Science King Mongkuts Institute of Technology Ladkrabang Bankok Thailand School of Management Technology Sirindhorn International Institute of Technology Thammasat University Pathumthani Thailand

The paper proposes to simulate feasibility of using virtualization technology to auto-scaling problem in cloud computing. It uses ARENA simulation software to build two different models. There are auto-scaling without server virtualization and auto-scaling with server virtualization. The results of our experiment show that employing virtualization technology increases both life time of servers and CPU utilization.

关键词： Servers Electronic mail Load modeling Computational modeling Cloud computing Mathematical model Blogs

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Session-Oriented Communication System for truly reliable and robust Smart Grid

Session-Oriented Communication System for truly reliable and...

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IEEE Globecom Workshops

作者： Augusto Neto Eduardo Cerqueira Neuman Souza Luci Pirmez Danielo Gomes Rui Aguiar Department of Informatics Engineering (DETI) Federal University of Ceará Fortaleza Ceara Brazil Computer Engineering (ENGCOMP) Federal University of Para (UFPA) Belem Parana Brazil Group of Computer Communications Software Engineering and Systems (GREat) Fortaleza Ceara Brazil Federal University of Rio de Janeiro Rio de Janeiro Brazil Telecommunications Institute (IT) Aveiro Portugal

Environmental sustainability issues and the costs of new power generation and transmission have increased the interest in evolving current power grid to new technologies. The Smart Grid is a promising technology, since it allows a distributed computing approach with potentials for self-diagnosing/-healing, reliable multi-user communication and fast hard real-time control. However, the missing standardization associated with heterogeneity of legacy systems and wide-area service demands, makes very challenging to adopt Smart Grid in a cost-effective way. By considering this, we propose the Session-Oriented Communication System (SOCSys) to overcome the above issues by enhancing Smart Grid with truly reliable and robust capabilities over heterogeneous environments. SOCSys achieves this goal by orchestrating session-control with innovative network-centric facilities operating over a wireless mesh Information Network compliant with IEEE 802.11e/s standard. The simulation results show that SOCSys improved network performance in terms of bandwidth utilization and minimization of delay, while consuming low network resources. Graphical analyses showed that SOCSys supported multimedia sessions with excellent quality, where it outperforms the experiments with regular settings.

关键词： Smart grids Quality of service IEEE 802.11e Standard Wireless communication IP networks Reliability Throughput

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Reducing network congestion by separating nets of single-row networks into layers

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Procedia - Social and Behavioral Sciences 2011年 28卷 39-44页

作者： A. Noraziah Tutut Herawan Noriyani Mohd Zin Norazaliza Mohd Jamil Mustafa Mat Deris Zailani Abdullah Faculty of Computer Systems and Software Engineering Faculty of Industrial Sciences and Technology Universiti Malaysia Pahang Lebuhraya Tun Razak Gambang 26300 Kuantan Pahang Malaysia Faculty of Computer Science and Information Technology Universiti Tun Hussein Onn Malaysia Parit Raja 86400 Batu Pahat Johor Malaysia Department of Computer Science Universiti Malaysia Terengganu 21030 Kuala Terengganu Terengganu Malaysia

Single-row routing is a method for routing pair of nodes set in a single-row axis. The nets construct the wire without traverse each other in the printed circuit board design that has been drawn from left to right. The main purpose in single-row routing is to achieve the optimal results of minimum congestion arise from the number of horizontal tracks in the network. Optimal results for a single layer network have been achieved through a model called Enhanced Simulated Annealing Single-row Routing (ESSR). However, a single layer model suffers from non-tolerable lower bound values with high congestion depending on the network size. These results may further be improved by partitioning the network into two or more layers. In this paper, a technique for partitioning the nodes from a single-row network into several layers of planar graphs by using k-means algorithm has been proposed. The experiment result shows that the proposed technique is able to minimize the network congestions.

关键词： ESSR graph clustering k-means algorithm single-row routing

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A Framework for Efficient Data Analytics through Automatic Configuration and Customization of Scientific Workflows

A Framework for Efficient Data Analytics through Automatic C...

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IEEE International Conference on e-Science and Grid Computing

作者： Matheus Hauder Yolanda Gil Yan Liu Institute for Software and Systems Engineering University of Augsburg Augsburg Germany Information Sciences Institute University of Southern California Marina del Rey CA USA Computer Science Department University of Southern California Los Angeles CA USA

Data analytics involves choosing between many different algorithms and experimenting with possible combinations of those algorithms. Existing approaches however do not support scientists with the laborious tasks of exploring the design space of computational experiments. We have developed a framework to assist scientists with data analysis tasks in particular machine learning and data mining. It takes advantage of the unique capabilities of the Wings workflow system to reason about semantic constraints. We show how the framework can rule out invalid workflows and help scientists to explore the design space. We demonstrate our system in the domain of text analytics, and outline the benefits of our approach.

关键词： Algorithm design and analysis software algorithms Prediction algorithms Machine learning algorithms software Clustering algorithms Correlation

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The integration of skin color segmentation and self-adapted template matching for the robust face detection

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International Review on computers and software 2011年第5期6卷 795-805页

作者： Zhiwen, Wang Shao-Zi, Li Ying, Dai Cognitive Science Department Xiamen University Xiamen 361005 China Department of Computer and Engineering Guangxi University of Technology Liuzhou 545006 China Fujian Key Laboratory of the Brain-like Intelligent Systems Xiamen University Xiamen 361005 China Faculty of Software and Info. Science Iwate Pref. University Iwate Japan

In this paper, an approach of integrating skin color segmentation and self-adapted template matching for the robust face detection is proposed. According to the clustering properties of the skin color of human faces in the YCbCr color space, the regions which close to the skin color are separated from the image by using Gaussian mixture model in order to achieve the purpose of rapidly detecting the external face. The influence of the brightness on the detection of the human faces is eliminated by using the illumination compensation technology, and also the confusion of the regions with the closed skin color with the human face is overcome by the adaptive template matching. Computation in the matching process is reduced by using the second matching algorithm. Experimental results show that proposed method can rapidly detect the human faces from a variety of images, while those detected faces include several of facial images with the different sizes, poses, races under the different illumination conditions. © 2011 Praise Worthy Prize S.r.l. - All rights reserved.

关键词： Template matching

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Educating software engineers of the future: software quality research through problem-based learning

Educating software engineers of the future: Software quality...

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Conference on software engineering Education & Training (CSEE&T)

作者： Ita Richardson Louise Reid Stephen B. Seidman Bob Pattinson Yvonne Delaney Department of Computer Science & Information Systems and Lero-the Irish Software Engineering Research Centre University of Limerick Ireland College of Science Texas State University San Marcos USA Management Development Unit Kemmy Business School University of Limerick Ireland

ISBN: (纸本)9781457703492

software engineering graduates are expected to enter the workforce with both technical and soft skills. In addition, software quality is a topic that is becoming increasingly important both because of educational and industry requirements. software engineering lecturers need to bring their research into the classroom. Bringing all of these together can pose the lecturer with a dilemma that is not easily solvable. This paper presents how problem-based learning, a pedagogical methodology that is popular in medicine and other disciplines, can be used to accomplish these goals in a single course module. It describes a research project which analyses the implementation of problem-based learning within a M. Sc. software engineering Quality Module, and evaluates the outcomes against published expectations.

关键词： software quality software engineering Hospitals Education Standards

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Global software development and collaboration: Barriers and solutions

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ACM Inroads 2010年第3期1卷 66-78页

作者： Noll, John Beecham, Sarah Richardson, Ita Lero the Irish Software Engineering Centre Department of Computer Science and Information Systems University of Limerick Limerick Ireland

While organisations recognise the advantages offered by global software development, many socio-technical barriers affect successful collaboration in this inter-cultural environment. In this paper, we present a review of the global software development literature where we highlight collaboration problems experienced by a cross-section of organisations in twenty-six studies. We also look at the literature to answer how organisations are overcoming these barriers in practice. We build on our previous study on global software development where we define collaboration as four practices related to agreeing, allocating, and planning goals, objectives, and tasks among distributed teams. We found that the key barriers to collaboration are geographic, temporal, cultural, and linguistic distance;the primary solutions to overcoming these barriers include site visits, synchronous communication technology, and knowledge sharing infrastructure to capture implicit knowledge and make it explicit. © 2010 ACM.

关键词： software design

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Prioritization of quality requirements: State of practice in eleven companies

Prioritization of quality requirements: State of practice in...

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IEEE International Conference on Requirements engineering

作者： Richard Berntsson Svensson Tony Gorschek Björn Regnell Richard Torkar Ali Shahrokni Robert Feldt Aybuke Aurum Department of Computer Science Lund University Lund Sweden School of Computing Blekinge Institute of Technology Karlskrona Sweden Software Engineering and Technology Chalmers University of Technology Goteborg Sweden School of Information Systems Technology and Management University of New South Wales Sydney Australia

Requirements prioritization is recognized as an important but challenging activity in software product development. For a product to be successful, it is crucial to find the right balance among competing quality requirements. Although literature offers many methods for requirements prioritization, the research on prioritization of quality requirements is limited. This study identifies how quality requirements are prioritized in practice at 11 successful companies developing software intensive systems. We found that ad-hoc prioritization and priority grouping of requirements are the dominant methods for prioritizing quality requirements. The results also show that it is common to use customer input as criteria for prioritization but absence of any criteria was also common. The results suggests that quality requirements by default have a lower priority than functional requirements, and that they only get attention in the prioritizing process if decision-makers are dedicated to invest specific time and resources on QR prioritization. The results of this study may help future research on quality requirements to focus investigations on industry-relevant issues.

关键词： Companies Interviews Industries Ad hoc networks Instruments Planning Telecommunications

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Scalable Rekeying Algorithm in IEEE 802.16e

Scalable Rekeying Algorithm in IEEE 802.16e

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Asia-Pacific Conference on Communications

作者： Mohammad Mehdi Gilanian Sadeghi Borhanuddin Mohd Ali Maode Ma Jamalul-lail Ab Manan Nor Kamariah Noordin Sabira Khatun Department of Computer and Communication Systems Engineering Universiti Putra Malaysia School of Electrical and Electronic Engineering Nanyang Technological University Advanced Analysis and Modeling (ADAM) Cluster MIMOS Berhad Faculty of Computer Systems and Software Engineering Universiti Malaysia Pahang

ISBN: (纸本)9781457703898

IEEE 802.16e standard provides wide coverage and high bandwidth for subscribers in a metropolitan area network. It introduces Multicast and Broadcast Rekeying Algorithm (MBRA) which is a multicasting scheme to communicate with many users concurrently. Although ELAPSE (for Efficient sub-Linear rekeying Algorithm with Perfect SEcrecy) improves on the deficiencies of MBRA, the algorithm poorly responds to scalability issue. This paper proposes a Scalable Rekeying Algorithm (SRA) based on a complete binary tree structure. SRA is introduced with linear linked list structure in order to make the system more scalable. Evaluation analysis shows that SRA manages to improve the scalability issue in MBRA for Mobile WiMAX.

关键词： Rekeying algorithm Scalability Unicast Group key management

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