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Joint Conferences on Pervasive Computing (JCPC)

作者： Ching-Sheng Wang Chun-Hong Huang Yong-Si Chen Li-Jie Zheng Department of Computer Science & Information Engineering Aletheia University Taiwan Department of Computer Information & Network Engineering Lunghwa University of Science and Technology Taiwan Department of Computer Science & Information Engineering Tamkang University Taiwan

ISBN: (纸本)9781424452279;9781424452286

The Radio Frequency Identification (RFID) positioning based on the signal strength is the well know and feasible method. But the researches based on signal strength only usually make unsatisfied positioning error because of the instable of RFID signal. In this paper, we propose an indoor RFID positioning system which is based on the analysis of signal strength, the layout of sensing region, and the tracks of users. Different from the other RFID positioning systems, we use only one RFID reader with user, and the tags are layout in the positioning area systematically. The system integrates two phase work of positioning: analysis of signal strength in overlapping sensing area (Level 1), and analysis of users' movement directions with signal comparison (Level 2). The experiments show that the proposed mechanism improves the accuracy of positioning successfully.

关键词： Indoor environments Radiofrequency identification Active RFID tags Signal analysis RF signals Signal processing Ubiquitous computing Navigation Global Positioning System Space technology

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Fault Tolerant Dual Basis Multiplier Over GF (2m)

Fault Tolerant Dual Basis Multiplier Over GF (2m)

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IEEE Circuits and Systems International Conference on Testing and Diagnosis, ICTD

作者： Chiou-Yng Lee Pramod Kumar Meher Department Computer Information and Network Engineering Lunghwa University of Science and Technology Taoyuan Taiwan Department School of Computer Engineering Nanyang Technological University Singapore

To fight against fault based side-channel cryptanalysis, a bit-parallel systolic dual basis multiplier using a time redundancy scheme is presented. This scheme is based on the extended dual multiplication to achieve the concurrent error correction (CEC) in the results. Analytical results reveal that our proposed CEC multiplier demands 1.87% space overheads, while the existing multipliers using parity prediction and time/hardware redundancy schemes demand at least 45% space overheads. Moreover, the time overhead of the proposed scheme amounts to only two clock cycles.

关键词： Fault tolerance Redundancy Error correction Cryptography Galois fields Hardware Polynomials Arithmetic Clocks Circuit faults

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Design and implementation of a new integrated e-commerce system based on AJAX

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Journal of Computational Information Systems 2009年第2期5卷 755-762页

作者： Wei, Chuyuan Lv, Cheng Zhang, Mian Department of Computer Instruction and Network Information Beijing University of Civil Engineering and Architecture Beijing 100044 China

Web services and AJAX technology is an application communication standard, component model and programming language that can solve the problems with enterprises' business integration. A new business logic framework for modern e-commerce combined within the enterprise management system such as ERP and CRM, and integrated to the operation flow and distribution platform is presented in this paper. Data reuse scheme based on web service is a very important method used to solve the system data dispersion and inconsistency for each node of a modern business flow. At last, some implementation function samples designed and coded by AJAX are presented. Compare to the traditional e-commerce system, our system is improved based on the above points, which provides a more convenient and shortcut shopping experience for the consumers, and a more beneficial and effective controlling mode for the management teams. © 2009 Binary Information Press March, 2009.

关键词： Web services

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Improvement of Bonding driver and application to parallel processing on commodity PC cluster

Improvement of Bonding driver and application to parallel pr...

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SICE Annual Conference

作者： Takafumi Fukunaga Department of Computer Network Engineering Kumamoto Prefectural College of Technology Kumamoto Japan

We have studied various methods for improving the performance of PC clusters. Most of them have used special hardware, non standard protocols, so that need special added library and complex programming, tending to raise their cost and to spoil their flexibility. To solve their problems we propose improving of Bonding driver. This improvement have a good influence on some kinds of parallel applications on commodity PC clusters without costing a great deal, using comparatively simple method where distribute sending frames to multiple network interface cards (hereafter NICs) on a round-robin basis. This means divide communication loads equally between multiple NICs attached to each PC. We measured the maximum bandwidth and parallel performance for the PC cluster with Gigabit Ethernet. A result shows our proposal method improves the bandwidth and the performance of several parallel benchmarks in comparison with the system using single NIC (hereafter 1NIC) and existing Bonding driver (hereafter Bond). The bandwidth comes up to 1,249 Mbps which is 1.33 times and 1.47 times faster than those of 1NICand Bond. The bandwidth of Bond cannot even reach that of 1NIC. The results of SP and BT in NAS Parallel Benchmarks (NPB) come up to 1,715 Mop/s and 5,264 Mop/s which are 1.81 and 1.63 times faster than 1NIC, 1.17 and 1.15 times faster than Bond respectively.

关键词： Bonding Parallel processing Bandwidth Hardware Protocols Libraries Costs Costing network interfaces Ethernet networks

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Dissemination of Data Aggregation in Vehicular Ad Hoc networks

Dissemination of Data Aggregation in Vehicular Ad Hoc Networ...

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International Symposium on Parallel Architectures, Algorithms and networks (ISPAN)

作者： Hua-Wen Tsai Tzung-Shi Chen Sheng-Kai Lin Department of Computer Information and Network Engineering Lunghwa University of Science and Technology Taiwan Department of Computer Science and Information Engineering National University of Tainan Taiwan

Inquiring traffic information is an important issue in vehicular ad hoc networks. This paper proposes an aggregating data dissemination algorithm in vehicular ad hoc networks. This algorithm can offer the various degrees of traffic information when users propose inquiry for different regional ranges. The user often needs to obtain the detailed data from the small area or the summary data for the large area. The traffic information is aggregated and kept in the periphery of region. When users inquire for the small area, they can get the detailed data. If the inquire is for the large area, users can obtain the summary data. The simulation results show that our algorithm decreases more communication cost and increases more accuracy than those for the previous work. Additionally, the users can obtain the data quickly, when they only need the summary data.

关键词： Ad hoc networks Telecommunication traffic network servers Costs computer architecture Aggregates Mobile ad hoc networks Application software Vehicles computer networks

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An intruder avoidance vulnerable path adjustment protocol for wireless mobile sensor networks

An intruder avoidance vulnerable path adjustment protocol fo...

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Joint Conferences on Pervasive Computing (JCPC)

作者： Kuei-Ping Shih Chun-Chih Li Yen-Da Chen Department of Computer Science & Information Engineering Tamkang University Taipei Taiwan Department of Computer Information & Network Engineering Lunghwa University of Science and Technology Taiwan

ISBN: (纸本)9781424452279;9781424452286

The paper proposes a protocol to adjust the vulnerable path by using mobile sensor networks. The objective of vulnerable adjustment is to protect some important areas, named TBP (to-be-protected) areas in the paper, from being attacked. In the paper, Voronoi diagram is utilized to And a vulnerable path, which is a path that an intruder may pass through. While the vulnerable path passes over a TBP area, a backward tracing and critical sets selection schemes are used to move the fewest number of sensors such that the vulnerable path can be changed and the new vulnerable path will not pass over the TBP area. Moreover, a moving schemes is proposed to decide where mobile sensors shall move. Since sensor movement is the major resource of energy consumption, thus, in order not to cause much movement, the proposed mechanism can move the fewest number of sensors with the shortest distance. Simulation results also verify the advantages of the proposed mechanism.

关键词： Wireless sensor networks Wireless application protocol Protection Surveillance Mobile computing Monitoring computer science computer networks Paper technology Energy consumption

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network intrusion detection and classification with decision tree and rule based approaches

Network intrusion detection and classification with decision...

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2009 9th International Symposium on Communications and Information Technology, ISCIT 2009

作者： Komviriyavut, Thanvarat Sangkatsanee, Phurivit Wattanapongsakorn, Naruemon Charnsripinyo, Chalermpol Department of Computer Engineering King Mongkut's University of Technology Thonburi 126 Pracha-Utid Tung-Kru Bangkok 10140 Thailand Network Technology Laboratory National Electronics and Computer Technology Center Klong Luang Pathumthani 10120 Thailand

ISBN: (纸本)9781424445219

Together with the extensive deployment of computer networks, the number of network attacks is greatly increasing. These attacks affect to availability and quality of services of the networks as well as confidentiality of private or important information data. In this paper, we present two network intrusion detection (IDS) techniques which are C4.5 Decision Tree and Rip per rules to assess and test an online dataset (RLD09 dataset). The dataset was collected from actual environment and then preprocessed to have only 13 features which are much simpler than existing traditional dataset such as KDD99 with 41 features. Thus, the RLDO9 dataset features can provide real-time detection speed with low memory and CPU consumption. Our IDSs can classify the network data into classes which are normal data, Denial of Service (DoS) attack, and Probe (Port Scanning) attack. Our IDS techniques give the detection rates higher than 98%. Furthermore, they can detect unknown or new attacks, where the C4.5 Decision Tree detection rate is about the double of the Ripper rule detection rate. These tests can prove that our techniques are effective in detecting and classifying the new unknown attacks in the real environment. ©2009 IEEE.

关键词： Denial-of-service attack

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Real-time audio multicasting on bluetooth network

Real-time audio multicasting on bluetooth network

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International Conference on Electrical engineering/Electronics, computer, Telecommunications and Information Technology, ECTI-CON

作者： Sayam Pinkumphi Anan Phonphoem Intelligent Wireless Network Group (IWING) Department of Computer Engineering Faculty of Engineering Kasetsart University Bangkok Thailand

Bluetooth has been deployed in many mobile devices nowadays which still lacking of real-time multicast support. In this paper, the real-time audio multicasting protocol has been proposed by using Piconet multicast partitioning and prioritization with BNEP broadcasting scheme in the ACL link. The simulation results show that the system throughput aggregation has been increased. Also the delay and inter-packet time are significantly decreased.

关键词： Bluetooth Personal area networks Multicast protocols Master-slave Streaming media Quality of service Broadcasting Throughput Round robin Bandwidth

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Electricity market modelling with photovoltaic active and reactive power generation

Electricity market modelling with photovoltaic active and re...

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IFAC Symposium on Power Plants and Power Systems Control, PP and PSC 2009

作者： Petoussis, A.G. Petoussis, S.G. Zhang, X.-P. Georghiou, G.E. Patsalides, M. Makrides, G. Godfrey, K.R. School of Engineering University of Warwick Coventry CV4 7AL United Kingdom Network Business Unit Electricity Authority of Cyprus Nicosia CY-1399 Cyprus School of Electronic Electrical and Computer Engineering University of Birmingham Birmingham B15 2TT United Kingdom Department of Electrical and Computer Engineering University of Cyprus Nicosia CY-1678 Cyprus

Renewable energy systems are increasingly employed all over the world in order to provide alternative sources of electricity production and reduce CO2 emissions from conventional power plants. However, as the density of renewable systems increases, certain issues arise that need to be addressed. In particular, for photovoltaic (PV) systems connected to the grid, one parameter of importance is the variation of the PV power output with respect to the intensity of solar irradiance. This paper investigates the impact of the active and reactive power injected to the grid by PV systems, on the electricity market equilibrium, using the linear Supply Function Equilibrium (SFE) model. Numerical results for a 5-bus and the IEEE 57-bus systems, which are based on real PV output performance data collected from an experimental PV park, show the effects on the electricity market equilibrium outcome.

关键词： Renewable energy resources

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Information Seeking Support System for e-learning

Information Seeking Support System for e-learning

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Joint Conferences on Pervasive Computing (JCPC)

作者： Lawrence Y. Deng Yung-Hui Chen Yi-Jen Liu Department Computer Science and Information Engineering Saint John''s University Taiwan Department of Computer Information and Network Engineering Lunghwa University of Science and Technology Taiwan Department of Computer Science and Information Engineering Tamkang University Taiwan

ISBN: (纸本)9781424452279;9781424452286

How to provide a multimedia information seeking support system (ISSS) is becoming more and more imperative. In this paper, we provide a multimedia ISSS for e-learning. This system requires flexible support for the modeling of multimedia content models and also supports possible interactivity, transfer of streams multimedia data such as audio, video, text and annotations using network facilities. However, we investigated the existing standards and applications for multimedia documents models such as HTML, MHEG, SMIL, and HyTime etc. We propose a new approach for the modeling of reusable and adaptable multimedia content. We also developed a comprehensive system for advanced multimedia content production: support for recording the presentation, retrieving the content, summarizing the presentation, weaving the presentation and customizing the representation. This approach significantly impacts and supports the multimedia presentation authoring processes in terms of methodology and commercial aspects.

关键词： Electronic learning Multimedia systems Streaming media Ontologies Learning systems Frequency synchronization computer science HTML Production systems Content based retrieval

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