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Journal of Software 2009年第2期4卷 159-166页

作者： Deng, Lawrence Y. Chen, Yung-Hui Liu, Yi-Jen Chang, Yu-Chi Department Computer Science and Information Engineering St. 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

In this paper, we proposed an advanced Petri Net model to manage the workflow of a web-based multiple participants in virtual University. The presented approach not only can conspicuously help the developer to comprehend the interaction relationship but also to easily construct a shared and trusted virtual world. This approach was based on the scaffolding theory and ontology. Learning activities of students and teachers are supported and understood by each other by the intelligent knowledge system. Their behaviors including the student's self regulations and the teacher's/virtual campus regulations are performed and built with trust development. Ontology based course content SCJPLearn can be supported in teaching activities and assessment stage. This paper can be taken as a fundamental research framework and tools to study and understand the characteristics of e-learning and to explore its optimal vocational education application. © 2009 Academy Publisher.

关键词： Ontology

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Efficient Schnorr type identity-based blind signatures from bilinear pairings

Efficient Schnorr type identity-based blind signatures from ...

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2009 WRI World Congress on computer Science and Information engineering, CSIE 2009

作者： Zhenjie, Huang Qunshan, Chen Rufen, Huang Xuanzhi, Lin Department of Computer Science and Engineering Zhangzhou Normal University Zhangzhou 363000 China Key Lab. of Network Security and Cryptology Fujian Normal University Fuzhou 350007 China

ISBN: (纸本)9780769535074

Identity-based cryptosystem has a property that a user's public key can be easily calculated from his identity by a publicly available function, and can be hence a good alternative for certificate-based public key infrastructure. Blind signature has the anonymity and plays a central role in applications such as electronic voting and electronic cash systems. In this paper, we propose three efficient Schnorr type identity-based blind signature schemes based on bilinear pairings. Efficiency analysis shows that our schemes are far more efficient than Zhang and Kim's schemes in Asiacrypt 2002 and in ACISP 2003. © 2008 IEEE.

关键词： Public key cryptography

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An optimized design for serial-parallel finite field multiplication over GF(2m) based on all-one polynomials

An optimized design for serial-parallel finite field multipl...

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Asia and South Pacific Design Automation Conference

作者： P. K. Meher Yajun Ha Chiou-Yng Lee School of Computer Engineering Nanyang Technological University Singapore Department of Electrical & Computer Engineering National University of Singapore Singapore Department of Computer Information & Network Engineering Lunghwa University Taoyuan Taiwan

ISBN: (纸本)9781424427482

In this paper, we derive a recursive algorithm for finite field multiplication over GF(2 m ) based on irreducible all-one-polynomials (AOP), where the modular reduction of degree is achieved by cyclic-left-shift without any logic operations. A regular and localized bit-level dependence graph (DG) is derived from the proposed algorithm and mapped into an array architecture, where the modular reduction is achieved by a serial-in parallel-out shift-register. The multiplier is optimized further to perform the accumulation of partial products by the T flip flops of the output register without XOR gates. It is interesting to note that the optimized structure consists of an array of (m+1) AND gates between an array of (m+1) D flip flops and an array of (m+1) T flip flops. The proposed structure therefore involves significantly less area and less computation time compared with the corresponding existing structures.

关键词： Design optimization Galois fields Polynomials Elliptic curve cryptography Hardware Throughput Design engineering Logic Registers Digital arithmetic

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A centralized traffic control mechanism for evacuation of emergency vehicles using the DSRC protocol

A centralized traffic control mechanism for evacuation of em...

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2009 4th International Symposium on Wireless and Pervasive Computing, ISWPC 2009

作者： Huang, Chung-Ming Yang, Chia-Ching Tseng, Chun-Yu Chou, Chih-Hsun Laboratory of Multimedia Mobile Networking Department of Computer Science and Information Engineering National Cheng Kung University Tainan Taiwan Network and Multimedia Research Institute Institute for Information Industry Taipei Taiwan

ISBN: (纸本)9781424429660

Emergency service vehicles need safety and fluent paths to save time. In this paper, a centralized traffic control mechanism is proposed for the evacuation of vehicles that drive toward the dedicated path of the emergency vehicles (EV), e.g. Ambulance, Fire Engines, Police Cars, etc, using the Dedicated Short Range Communications (DSRC) protocol. In our proposed mechanism, a centralized server is used to monitor and control all traffic information to support real time traffic information and services for emergency vehicles, and the centralized server also calculates the shortest path for emergency vehicles to pass by. If the approaching information of emergency vehicles is not announced in advance to other vehicles that will obstruct the approaching path of emergency vehicles, it will cause the traffic muddle on the road and increase the delayed time for emergency vehicles. Thus, we also propose a data dissemination scheme to transmit the warning messages to other vehicles that will obstruct the approaching road of emergency vehicles. In our experiment, we will exhibit the performance of our proposed system. © 2009 IEEE.

关键词： Telematics

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An implementation of positioning system in indoor environment based on active RFID

An implementation of positioning system in indoor environmen...

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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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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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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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