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Midwest Symposium on Circuits and systems (MWSCAS)

作者： Himanshu Thapliyal Mark Zwolinski Centre for VLSI and Embedded System Technologies International Institute of Information Technology Hyderabad India Electronic System Design Group Electronics & Computer Science University of Southampton UK

Differential Power Analysis (DPA) presents a major challenge to mathematically-secure cryptographic protocols. Attackers can break the encryption by measuring the energy consumed in the working digital circuit. To prevent this type of attack, this paper proposes the use of reversible logic for designing the ALU of a cryptosystem. Ideally, reversible circuits dissipate zero energy. Thus, it would be of great significance to apply reversible logic to designing secure cryptosystems. As far as is known, this is the first attempt to apply reversible logic to developing secure cryptosystems. In a prototype of a reversible ALU for a crypto-processor, reversible designs of adders and Montgomery multipliers are presented. The reversible designs of a carry propagate adder, four-to-two and five-to-two carry save adders are presented using a reversible TSG gate. One of the important properties of the TSG gate is that it can work singly as a reversible full adder. In order to design the reversible Montgomery multiplier, novel reversible sequential circuits are also proposed which are integrated with the proposed adders to design a reversible modulo multiplier. It is intended that this paper will provide a starting point for developing cryptosystems secure against DPA attacks.

关键词： Cryptography Hardware Adders Logic design CMOS logic circuits Energy consumption Energy measurement Logic devices Voltage CMOS technology

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A Fast Capacitance Extraction Engine

A Fast Capacitance Extraction Engine

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2006 8th International Conference on Solid-State and Integrated Circuit technology

作者： Shilei Sun Jintao Xue Li Liu Gaofeng Wang Computer School Wuhan University Institute of Microelectronics & Information Technology Wuhan University State Key Laboratory of ASIC & System Fudan University

ISBN: (纸本)1424401607

A fast interconnect capacitance extraction engine is realized and presented *** a fast multipole accelerated Generalized Minimal Residual(GMRES) based three-dimensional(3-D) field solver,this software tool can quickly and accurately extract parasitic capacitances of arbitrary interconnects embedded in piece-wise constant *** engine is also capable of performing fast and accurate capacitance extraction for critical nets in Radio Frequency(RF) applications,IC designs,and MicroElectroMechanical systems(MEMS).The architecture of this extraction engine is *** examples are included to validate the extraction engine and demonstrate the capabilities of this extraction engine.

关键词： GMRES A Fast Capacitance Extraction Engine

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General-Service Ballistic computer Programming Based on B-Method

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Defence technology（防务技术） 2006年第3期2卷 178-183页

作者：郑宇军张子丘王金全薛锦云 Institute of Software Chinese Academy of Sciences Beijing 100080 China Armament Demonstration and Research Center Beijing 100034 China System Engineering Research Institute of Engineer Equipment Beijing 100093 China College of Computer Information Engineering Jiangxi Normal University Nanchang 330027 Jiangxi China

Formal methods offer the promise of significant improvement on quality and reliability of critical embedded software. B-Method is employed to develop general-service ballistic computer programs in the paper, each of which can be adapted to a family of service/weapon-specific ballistic computers. Based on the structuring mechanisms of B-method, a unified approach is proposed to systematically control the complexity of ballistic parameters in the process of type and operation refinement, and ultimately a series of high reliable, reusable, and scalable programs are produced. Experiences with the application of the method and tools are also discussed.

关键词：抽象机精化弹道程序设计

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Adaptive photon clustering method based on quadtree structure for dynamic scenes

Adaptive photon clustering method based on quadtree structur...

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International Conference on Multimedia Modeling (MMM)

作者： Bin-Shyan Jong Juin-Ling Tseng Wen-Hao Yang Tsong-Wuu Lin Department of Information and Computer Engineering Chung Yuan Christian University Taiwan Department of Management Information System Chin Min Institute of Technology Taiwan Department of Electronic Engineering Chung Yuan Christian University Taiwan Department of Electronic Engineering Chin Min Institute of Technology Taiwan Department of Computer and Information Science Soochow University Taiwan

This work proposes a simple and effective strategy for photon clustering, called regional photon clustering, to accelerate the global illumination updating of dynamic scenes. This method can cluster various numbers of photons adaptively. The scenes in adjacent frames are similar, and so most photons have the same moving paths in adjacent frames. Therefore, most photons do not need to be shot again in the next frame. Regional photon clustering employs a quadtree structure to track the trajectory of dynamic objects to reduce the number of re-shot photons. Experimental results show that regional photon clustering reduces the number of re-shot photons, and accelerates the estimation of global illumination in dynamic scenes

关键词： Clustering methods Layout Lighting Ray tracing Costs Photonics Acceleration computer graphics Computational modeling Management information systems

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NIR Optical-Property Images of Heterogeneous Intra-lipid Phantom

NIR Optical-Property Images of Heterogeneous Intra-lipid Pha...

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IEEE International Symposium on Signal Processing and information technology (ISSPIT)

作者： Min-chun Pan Chien-hung Chen Min-cheng Pan Department of Mechanical Engineering University System of Taiwan Jhong Li Taiwan Department of Computer Science and Information Engineering Tung Nan Institute of Technology Taipei Taiwan

The paper studies the tomography reconstruction of the intra-lipid phantom measured with near infrared (NIR) light (800 nm) using a tomographic scanning device in the DC domain, where the homogenous intra-lipid phantom as the normal tissue is inserted with another different volume density one as a tumor. In our research, the instrument of continuous wave as implied by the name employs continuous-wave light as a light source where the measurement of emerging light can yield the wavelength dependent attenuation. With comparing the difference between the homogeneous and the heterogeneous phantoms, 1-D signal measurement indicates the angular position of the inclusion. Following the measuring procedure, the numerical simulation to reconstruct tomographic images of optical properties was performed using 16 by 16 sources/detectors combination and the initial guess with a homogenous background for all cases where the finite element (FE) analysis was implemented. With the use of real measured data, promising results of tomographic absorption and diffusive image are successfully reconstructed

关键词： Imaging phantoms Tomography Optical attenuators Image reconstruction Wavelength measurement Density measurement Volume measurement Neoplasms Instruments Light sources

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Uniformly Partitioning Images on Virtual Hexagonal Structure

Uniformly Partitioning Images on Virtual Hexagonal Structure

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International Conference on Control, Automation, Robotics and Vision (ICARCV)

作者： Xiangjian He Huaqing Wang Namho Hur Wenjing Jia Qiang Wu Jinwoong Kim Tom Hintz Broadcasting System Research Group Digital Broadcasting Research Division Electronics and Telecommunications Research Institute South Korea Department of Computer Systems Faculty of Information Technology University of Technology Sydney Australia

Hexagonal structure is different from the traditional square structure for image representation. The geometrical arrangement of pixels on hexagonal structure can be described in terms of a hexagonal grid. Uniformly separating image into seven similar copies with a smaller scale has commonly been used for parallel and accurate image processing on hexagonal structure. However, all the existing hardware for capturing image and for displaying image are produced based on square architecture. It has become a serious problem affecting the advanced research based on hexagonal structure. Furthermore, the current techniques used for uniform separation of images on hexagonal structure do not coincide with the rectangular shape of images. This has been an obstacle in the use of hexagonal structure for image processing. In this paper, we briefly review a newly developed virtual hexagonal structure that is scalable. Based on this virtual structure, algorithms for uniform image separation are presented. The virtual hexagonal structure retains image resolution during the process of image separation, and does not introduce distortion. Furthermore, images can be smoothly and easily transferred between the traditional square structure and the hexagonal structure while the image shape is kept in rectangle

关键词： Spirals Shape Image processing Concurrent computing Parallel processing computer architecture computer vision Image resolution Computational complexity Image converters

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Reduction of RLC Tree Delay Using Bidirectional Buffer Repeater Insertion

Reduction of RLC Tree Delay Using Bidirectional Buffer Repea...

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International Conference on Innovative Computing, information and Control (ICICIC)

作者： Trong-Yen Lee Yang-Hsin Fan Chia-Chun Tsai Department of Electronic Engineering and Institute of Computer and Communication National Taipei University of Technology Taipei Taiwan Information System Section of Library National Taitung University Taitung Taiwan Department of Computer Science and Information Engineering Nanhua University Chiayi Taiwan

In this paper, we propose a bidirectional buffer repeater insertion to reduce the RLC tree delay in multi-source multi-sink systems which involve four significant factors in our works. First, inductance effect is taken into account due to the reason that chip sizes with the exponential reduction and high work frequency. Second, bidirectional buffer repeater could improve interconnect delay more than unidirectional buffer insertion. Third, the location of insertion buffer is also considered in our work. Fourth, more than one buffer could be inserted in critical path while buffers have already existed. Finally, we develop a graphical user interface for designers to estimate the delay with bidirectional buffer repeater insertion target multi-source multi-sink systems. Experiment results shown that the reduced delay rate is 50.73% and 64.47% in 0.18 and 0.35 micron fabrication process, respectively

关键词： Repeaters Delay estimation Delay effects Inductance Propagation delay Fabrication Very large scale integration Integrated circuit interconnections Frequency Control systems

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Implementation and evaluation of interactive online video learning for childcare SOPs

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WSEAS Transactions on computers 2006年第11期5卷 2799-2803页

作者： Wang, Joanne Hui-Tzu Chan, Po-Chou Chen, Yung-Fu Huang, Kuo-Hsien Department of Early Childhood Care and Education Central Taiwan University of Science and Technology Taichung 406 Taiwan Department of Management Information System Central Taiwan University of Science and Technology Taichung 406 Taiwan Department of Computer Science and Information Engineering National Chin-Yi Institute of Technology Taichung County 411 Taiwan

Most digital content and most digital libraries are mainly concerned with artefacts rather than the craft in making them or the skill in using these artefacts. The same concerns manifested in hospital and childcare standard operation procedures (SOPs). The motivation for this project is based on several observations. First, information technology and digital libraries are convenient and efficient virtual environments for teaching and learning. In addition, they can be built to the Internet. Second, students in universities expect state-of-the art learning resources from the Web. Third, life-long learning is becoming increasingly important worldwide. Fourth, housewives who intend to be child caregivers will particularly benefit from E-learning materials. Finally, E-learning with interactive videos provides more learner satisfaction than non-interactive and traditional classroom learning. In this paper, an application of online learning in child caregiver training is presented with step-by-step interactive videos that can be used for education of child caregivers. Metadata compatible with the Dublin core are used for recording the individual steps of SOPs. By analyzing and comparing the test scores using t-test, it was found that the system provides a more effective method than the non-interactive or traditional classroom learning (p<0.05). Additionally, analysis of the questionnaires shows that interactive video learning provides more learner satisfaction with Cronbach α measure of 0.766. In conclusion, the system implements a website of childcare SOP and supports an interactive online learning environment for practicing childcare skills. In the future, large-scale investigation and evaluation with more learners will be done for exploring the drawbacks and advantages of interactive learning.

关键词： Interactive computer systems

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Survey of the pattern matching algorithm in intrusion detection system

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2006年第SUPPL.期34卷 2488-2490页

作者： Mu, Yong-Min Li, Mei-Gui Liang, Qi Open Computer System Laboratory Beijing Information Technology Institute Beijing 100101 China

The openness of Internet offers great convenience of information sharing and exchange, accompanied with crucial challenges to information Security. As a kind of active measure of information Assurance, Intrusion Detection acts as the effective complement to traditional protection techniques. On the base of analyzing KMP algorithm and BM algorithm, which are fashionable pattern matching algorithms in intrusion detection system at present, the author gives an new pattern matching algorithm in place of the BM algorithm. The results show that the improved pattern matching algorithm has better efficiency and is helpful to reduce systematical missing package rate.

关键词： Intrusion detection

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Basic Transformations on Virtual Hexagonal Structure

Basic Transformations on Virtual Hexagonal Structure

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International Conference on computer Graphics, Imaging and Visualization, CGIV

作者： Xiangjian He Wenjing Jia Qiang Wu Namho Hur T. Hintz Huaqing Wang Jinwoong Kim Digital Broadcasting Research Division Electronics Telecommunications Research Institute Broadcasting System Research Group Daejeon South Korea Department of Computer Systems Faculty of Information Technology University of Technology Sydney Australia

Hexagonal structure is different from the traditional square structure for image representation. The geometrical arrangement of pixels on hexagonal structure can be described in terms of a hexagonal grid. Hexagonal structure provides an easy way for image translation and rotation transformations. However, all the existing hardware for capturing image and for displaying image are produced based on square architecture. It has become a serious problem affecting the advanced research based on hexagonal structure. In this paper, we introduce a new virtual hexagonal structure. Based on this virtual structure, a more flexible and powerful image translation and rotation are performed. The virtual hexagonal structure retains image resolution during the process of image transformations, and does not introduce distortion. Furthermore, images can be smoothly and easily transferred between the traditional square structure and the hexagonal structure

关键词： Image resolution computer architecture Spirals computer vision Image processing Broadcast technology Hardware Image storage computer graphics Image converters

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