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Gigabit Ethernet based substation under IEC61850 standard

Gigabit Ethernet based substation under IEC61850 standard

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2009 2nd International Conference on computer, Control and Communication, IC4 2009

作者： Raza, Ali Ullah, Khalil Ahmed, Saleem Ahmed, Salman Jang, Hyuk-Soo Yang, Hyo-Sik Department of Computer Software Myongji University Yongin Korea Republic of Department of Electronics and Communication Engineering Myongji University Yongin Korea Republic of Department of Computer Engineering Sejong University Seoul Korea Republic of Department of Computer Systems Engineering Mehran University Jamshoro Pakistan

ISBN: (纸本)9781424433148

Communication architecture for substation automation is one of the challenging and subtle tasks to address in order to visualize the substation into digital world under the umbrella of IEC61850. Communication paradigm for substation automation demands critical importance because of two reasons;as communication arena is changing day by day so it is convenient to opt for something that is simple to deploy and incur a less cost in terms of time and asset when migration is to be considered since data-intensive applications drive the incremental demand for bandwidth as per growing need with the expansion of concerned network and last but not least the interoperability as it is one of the core constrained put by IEC61850 for substation automation. So it is viable to consider Ethernet as the most promising solution for the communication architecture of substation automation as Ethernet technology has changed the trend of communication network because of its availability, efficiency, and cost effectiveness on the other hand interoperability is assured based on the proven and highly deployed industrial Ethernet. This paper presents analysis and the crucial need for the deployment of Gigabit Ethernet in the substation and also presents how Ethernet technology can help in the substation automation as a long run solution in the changing arena of communication as Ethernet is one of the most pervasive communication technologies. In the end we have performed simulations in NS-2 to prove that our suggested communication paradigm is optimal in various regards by keeping into consideration the constraints imposed by IEC61850.

关键词： Ethernet

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Baseline efficiency in EPON based architecture to inter-network substations

Baseline efficiency in EPON based architecture to inter-netw...

引用

2009 2nd International Conference on computer, Control and Communication, IC4 2009

ISBN: (纸本)9781424433148

The design of cost-effective, interoperable, and efficient communication architecture is indeed one of the pressing needs not only for the realization of substation automation (SA) as per specification of IEC61850 but also to inter-connect different substations with minimum cost to bring data from all substations on the single information highway thereby paving a smooth way to centralize all the available information. Ethernet technology has dramatically changed the communication trend because of its availability, efficiency, cost effectiveness, proven interoperability, and capability to drive on-demand bandwidth as per incremental growth and expansion of the network and on the other hand optical fiber communication system is one of the technically attractive communication medium due to its high capacity, efficiency, and security. Therefore, EPON (Ethernet Passive Optical Network) is the desired communication paradigm for the SA as it is shipped with the two most demanding communication trends, i.e., Ethernet and Fiber Optics in a single package. EPON underscores the importance of not only last-mile operability for inter-connecting different substations but can also play a vital role when ATM is replaced with GPON (Gigabit Passive Optical Network) for the long-haul communication thereby saving the cost of protocol conversion. In this paper we propose EPON as the desired communication architecture for inter-connecting substations and present analysis related to the significant importance of EPON with respect to the deployment in the substation environment both internally and externally. Finally we show the result of simulations to validate the deployment and effectiveness of our purposed communication paradigm for substation.

关键词： Cost effectiveness

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Investigating Security Threats in Information systems

Investigating Security Threats in Information Systems

引用

12th International-Business-Information-Management-Association Conference

作者： Samy, Ganthan Narayana Ahmad, Rabiah Ismail, Zuraini Department of Computer Systems and Communications Faculty of Computer Science and Information Systems Universiti Teknologi Malaysia (UTM) Malaysia Centre for Advanced Software Engineering (CASE) Faculty of Computer Science and Information Systems Universiti Teknologi Malaysia (UTM) Malaysia Department of Science College of Science and Technology Universiti Teknologi Malaysia (UTM) Malaysia

ISBN: (纸本)9780982148914

Information security surveys are important inputs to private, public and government sectors in order to measure current status of information security threats. This paper examines the various types of threats that exist in Information systems (IS) in one of government supported hospital in Malaysia. The hospital has been equipped for a Total Hospital Information System (THIS). The data collected were from three different departments using in-depth structured interviews. The study identified 22 types of threats according to major threat categories based on ISO/IEC 27002 (ISO 27799:2008). The result shows that the most critical threat for the THIS is the power failure followed by acts of human error or failure and other technological factors. This research holds significant value in terms of providing a comprehensive list of potential threat categories in IS and subsequently taking the results of this step as input for the risk mitigation strategy. Keywords: Healthcare Information systems (HIS), Information systems (IS), Risk Analysis, Threats

关键词： Healthcare Information systems (HIS) Information systems (IS) Risk Analysis Threats

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Architecture Based Reliability and Testing Estimation for Mobile Applications

Architecture Based Reliability and Testing Estimation for Mo...

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作者： Wadhwani, Vickey Memon, Fiaz Hameed, M. Muzaffar Blekinge Institute of Technology Department of Systems and Software Engineering Sweden University of Sindh Institute of Mathematics and Computer Science Jamshoro Pakistan

ISBN: (纸本)9783540898528

We propose an architecture-based testing and reliability framework for mobile applications. During our literature study, we explored some of the software testing and reliability techniques available, as well as investigating the techniques that are being used by industry. This paper presents case studies of two companies that are developing mobile applications. These are helpful for finding the strengths and weaknesses of existing software testing and reliability techniques. In light of these strengths and weaknesses, we propose a framework of architecture-based software testing and reliability estimation for mobile applications. © Springer-Verlag Berlin Heidelberg 2008.

关键词： software reliability

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Dependable workflow scheduling in global grids

Dependable workflow scheduling in global grids

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2009 10th IEEE/ACM International Conference on Grid Computing, Grid 2009

作者： Rahman, Mustafizur Ranjan, Rajiv Buyya, Rajkumar Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia Service Oriented Computing Research Group School of Computer Science and Engineering University of New South Wales Australia

ISBN: (纸本)9781424451494

In this paper, a reputation-based Grid workflow scheduling algorithm is proposed to counter the effect of inherent unreliability and temporal characteristics of computing resources in large scale, decentralized Grid overlays. The proposed approach builds upon structured peer-to-peer indexing and overlay networking techniques to create a scalable wide-area networking of Grid sites for supporting dependable scheduling of applications. The scheduling algorithm considers reliability of a Grid resource as a statistical property, which is globally computed in the decentralized Grid overlay based on dynamic feedbacks or reputation scores assigned by individual service consumers (Grid Resource Brokers). The proposed algorithm can dynamically adapt to changing resource conditions and offer significant performance gains as compared to traditional approaches in the event of unsuccessful job execution or resource failure. We evaluate and demonstrate the feasibility of our approach through an extensive trace driven simulation. The results show that our scheduling technique can reduce the makespan up to 50% and successfully isolate the failure-prone resources from the system. © 2009 IEEE.

关键词： Scheduling algorithms

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A distributed heuristic for decentralized workflow scheduling in global grids

A distributed heuristic for decentralized workflow schedulin...

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2009 10th IEEE/ACM International Conference on Grid Computing, Grid 2009

ISBN: (纸本)9781424451494

Efficient scheduling is a key concern for the effectual execution of performance driven Grid applications, such as workflows. Many list heuristics have been developed for scheduling workflows in centralized Grid environment. However, in this paper, we present a distributed list heuristic for decentralized scheduling of workflow applications in global Grids. The simulation results show that the proposed scheduling approach is scalable with respect to increased workload on the system. © 2009 IEEE.

关键词： Scheduling

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The design of an autonomic element for managing emerging networks and services

The design of an autonomic element for managing emerging net...

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2009 International Conference on Ultra Modern Telecommunications and Workshops

作者： Strassner, John Hong, James Won-Ki Van Der Meer, Sven Department of Computer Science and Engineering Pohang University of Science and Technology Pohang Korea Republic of Telecommunications Software and Systems Group Waterford Institute of Technology Waterford Ireland

ISBN: (纸本)9781424439416

Next generation networks, as well as the Future Internet, aim to provide context-sensitive business services that adapt to changing user needs, business goals, and environmental conditions. This paper describes the composition of an Autonomic Element, as a fundamental part of an autonomic architecture, which uses information models and semantics to link the business services with the services provided by the underlying network devices. This linkage is inherently contextaware, and allows context changes to determine the impact of changes in the network towards business services and vice versa. The described Autonomic Element is a programmable toolbox supporting the clean-slate approach as well as evolutionary approaches for the Future Internet. ©2009 IEEE.

关键词： Next generation networks

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Particle swarm optimization for gene selection in classifying cancer classes

Particle swarm optimization for gene selection in classifyin...

引用

作者： Mohamad, M.S. Omatu, S. Deris, S. Yoshioka, M. Department of Computer Science and Intelligent Systems Graduate School of Engineering Osaka Prefecture University Sakai Osaka 599-8531 Japan Department of Software Engineering Faculty of Computer Science and Information Systems Universiti Teknologi Malaysia 81310 Skudai Johore Malaysia

ISBN: (纸本)9784990288037

The application of microarray data for cancer classification has recently gained in popularity. The main problem that needs to be addressed is the selection of a smaller subset of genes from the thousands of genes in the data that contributes to a disease. This selection process is difficult due to the availability of a small number of samples compared to the huge number of genes, many irrelevant genes, and noisy genes. Therefore, this paper proposes an improved binary particle swarm optimization to select a near-optimal (smaller) subset of informative genes that is relevant for cancer classification. Experimental results show that the performance of the proposed method is superior to the experimental method and other related previous works in terms of classification accuracy and the number of selected genes. ©ISAROB 2009.

关键词： Genes

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Gene subset selection using an iterative approach based on genetic algorithms

Gene subset selection using an iterative approach based on g...

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ISBN: (纸本)9784990288037

Microarray data are expected to be useful for cancer classification. The main problem that needs to be addressed is the selection of a smaller subset of genes from the thousands of genes in the data that contributes to a disease. This selection process is difficult due to many irrelevant genes, noisy genes, and the availability of a small number of samples compared to a huge number of genes (higher-dimensional data). Hence, this paper aims to select a near-optimal (smaller) subset of informative genes that is most relevant for the cancer classification. To achieve the aim, an iterative approach based on genetic algorithms has been proposed. Experimental results show that the performance of the proposed approach is superior to other related previous works as well as four methods experimented in this work. In addition a list of informative genes in the best gene subsets is also presented for biological usage. ©ISAROB 2009.

关键词： Genes

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Scheduling parallel applications on Utility Grids: Time and cost trade-off management

Scheduling parallel applications on Utility Grids: Time and ...

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32nd Australasian computer Science Conference, ACSC 2009

作者： Garg, Saurabh Kumar Buyya, Rajkumar Siegel, H.J. Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne VIC 3010 Australia Electrical and Computer Engineering Department Colorado State University Fort Collins United States Computer Science Department Colorado State University Fort Collins United States

ISBN: (纸本)9781920682729

With the growth of Utility Grids and various Grid market infrastructures, the need for efficient and cost effective scheduling algorithms is also increasing rapidly, particularly in the area of meta-scheduling. In these environments,users not only may have conflicting requirements with other users, but also they have to manage the trade-off between time and cost such that their applications can be executed most economically in the minimum time. Thus, choosing of the best Grid resources becomes a challenge in such a competitive market. This paper presents two novel heuristics for scheduling parallel applications on Utility Grids that manage and optimize the trade-off between time and cost constraints. The performance of the heuristics is evaluated through extensive simulations of a real-world environment with real parallel workload models to demonstrate the practicality of our algorithms. We compare our scheduling algorithms against other common algorithms used by current meta-schedulers. The results shows that our algorithms outperform other algorithms by minimizing the time and cost of application execution on Utility Grids. Copyright © 2009, Australian computer Society, Inc.

关键词： Scheduling algorithms

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