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5th International Workshop on Information Hiding, IH 2002

作者： Noda, Hideki Spaulding, Jeremiah Shirazi, Mahdad N. Niimi, Michiharu Kawaguchi, Eiji Kyushu Institute of Technology Dept. of Electrical Electronic and Computer Engineering 1-1 Sensui-cho Tobata-ku Kitakyushu804-8550 Japan Communications Research Laboratory Keihanna Human Info-Communications Research Center 2-2-2 Hikaridai Seika-cho Soraku-gunKyoto619-0289 Japan

ISBN: (纸本)3540004211

This paper presents a steganography method based on JPEG2000 lossy compression scheme and bit-plane complexity segmentation (BPCS) steganography. In JPEG2000 compression, wavelet coefficients of an image are quantized into a bit-plane structure and therefore BPCS steganography can be applied in the wavelet domain. The proposed JPEG2000-BPCS steganography was implemented using JJ2000 Java software of JPEG2000 compression, with which the program module for BPCS steganography was integrated. The proposed steganography enables us to use JPEG2000 lossy compressed images as dummy files for embedding secret data. Embedding rates of around 15% of the compressed image size were achieved for pre-embedding 1.0bpp compressed images with no visually noticeable degradation in image quality. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Steganography

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A wearable intelligent system for monitoring health condition and rehabilitation of running athletes

A wearable intelligent system for monitoring health conditio...

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IEEE EMBS International Conference on Information technology Applications in Biomedicine (ITAB)

作者： C. Glaros D.I. Fotiadis A. Likas A. Stafylopatis Dept. of Materials Science University of Ioannina Ioannina Greece Unit of Medical Technology and Intelligent Information Systems University of Ioannina and Biomedical Research Institute-FORTH Ioannina Greece Dept. of Electrical and Computer Engineering National Technical University of Athens Athens Greece

A wearable intelligent platform for the monitoring of the health condition and rehabilitation of athletes is presented. The system provides doctors and trainers with real-time monitoring, alerting and medical decision support. It aims to help them optimize treatment and training procedures during rehabilitation, to prevent injury relapses and to ensure a prompt return to peak athletic condition. The system's design requirements are laid out along with its functional description. It is composed of three main subsystems: the athlete subsystem, the rehabilitation station and the portal. The athlete subsystem includes all the monitoring sensors worn by the athlete during training, along with a signal collector and a processing-transceiver unit for preliminary evaluation and for exchanging information with the rehabilitation station. The rehabilitation station is the main control, access and communication point of the system carrying most of the processing. The measurements derived from the received signals are fed into an intelligent module, which provides with the monitoring, alerting and decision support mechanisms. A virtual reality interface is used by the athlete to communicate with the system. The portal is a long-term data storage facility collecting selected data for research purposes.

关键词： Biomedical monitoring Intelligent systems Condition monitoring Portals Real time systems Injuries Wearable sensors Signal processing Communication system control Control systems

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A new DDP based cipher CIKS-128h architecture design LSI implementation optimization of CBC encryption hashing over 1Gbps

A new DDP based cipher CIKS-128h architecture design LSI imp...

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Midwest Symposium on Circuits and systems (MWSCAS)

作者： N.S. Iavos N.A. Moldovyan O. Koufopavlou Dept. of Electr. & Comput. Eng. Patras Univ. Greece Specialized Center of Program Systems SPECTR St. Petersburg Russia Electrical Computer Engineering Department University of Patras Patras Greece

Using an advanced data-dependent (DD) operation (DDO) instead of the DD permutations (DDP) in the known cipher CIKS-128 a new 128-bit cipher CIKS-128h, with reduced number of rounds, has been designed. Additionally we propose a cryptoscheme of the EUS hash function based on CIKS-128h. The single cryptographic core performing data encryption and hashing has been implemented in XILINX FPGA device. The implementation provides significantly higher performance against hash functions MD5, SHA-1 and ciphers DES, AES, IDEA, CIKS-128h. Due to high performance and low implementation cost, the proposed cryptographic device can be efficiently used to solve practical security problems of wired and wireless communication.

关键词： Very large scale integration Design optimization Cryptography Data security Hardware Privacy Costs Mobile communication Communication system security Authentication

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Product sustainability improvement based on performance of product components

Product sustainability improvement based on performance of p...

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IEEE International Symposium on Electronics and the Environment

作者： G. Meimei Mengchu Zhou Dept. of Electr. & Comput. Eng. New Jersey Inst. of Technol. Newark NJ USA Department of Electrical & Computer Engineering Multi-lifecycle Engineering Research Center New Jersey Institute of Technology Newark NJ USA

The sustainability target method (STM) provides a practical sustainability target for individual businesses and products through determining the relative indicator resource productivity (RP) for environmental performance and the absolute indicator eco-efficiency (EE) for sustainability. This paper investigates an optimal decision making approach for a company to improve its product's sustainability using the STM indicators RP and EE of the product components. Sensitivity analysis is used to provide a methodology to indicate which components should receive attention to make the overall product more sustainable. The feasibility of the approach is validated using a case study of a generalized product consisting of multiple components, which relates easily to circuit board assemblies and other types of electronic products.

关键词： Production Sensitivity analysis Productivity Companies Sustainable development Power generation economics Economic indicators Environmental economics Virtual reality Printed circuits

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Simulation of spin-polarized transport in submicrometer device structures

Simulation of spin-polarized transport in submicrometer devi...

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IEEE Conference on Nanotechnology

作者： S. Saikin Min Shen M.-C. Cheng V. Privman Dept. of Electr. & Comput. Eng. Clarkson Univ. Potsdam NY USA Center for Quantum Device Technology Department of Electrical and Computer Engineering Clarkson University Potsdam NY USA Clarkson University Potsdam NY US

The Monte Carlo approach is utilized to study spin-polarized electron transport in spintronic device structures. Evolution of the electron spin polarization vector is controlled by the spin-orbit interaction. Spin polarization properties, including the spin-dephasing length and orientation of the polarization vector, are investigated, for the applied voltage from 0.05 V to 0.25 V, and for temperatures ranging from 77 K to 300 K.

关键词： Spin polarized transport Electrons Polarization Magnetoelectronics Monte Carlo methods Physics Distribution functions Computational modeling Quantum computing Region 8

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STM‐Induced Luminescence Spectra from Au(111) with STM Tips of Pt‐Ir Alloys

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AIP Conference Proceedings 2003年第1期696卷

作者： R. Nishitani Y. Tateishi H. Arakawa A. Kasuya K. Sumiyama Dept. of Electrical and Electronics Engineering Univ. of the Ryukyus Okinawa 903‐0213 Japan Dept. of Computer Sciences and Electronics Kyusyu Institute of Technology Iizuka Fukuoka 820‐8502 Japan Center for Interdisciplinary Research Tohoku Univ. Aoba‐ku Sendai 980‐8578 Japan Dept. of Materials Science and Engineering Nagoya Institute of Technology Showa‐ku Nagoya 466‐8535 Japan

The emission spectra of STM‐induced luminescence for Au(111) with Pt‐Ir alloy have been studied. We have observed the STM‐tip dependent emission spectra. The emission spectra with Pt‐Ir(20%) tip are not well reproduced, showing various spectra depending on the nature of the tip apex, while the spectra with pure Pt or Pt‐Ir(10%) tips are reproducibly obtained. The STM‐induced emission spectra for different STM tips have been calculated by the electromagnetic theory with complex dielectric functions defined in two different ways for alloy material, and compared with the experimental results. The characteristics of the spectra are interpreted in terms of the one mode type and two mode type depending on the composition rates.

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Low power bus encoding with crosstalk delay elimination 15

Low power bus encoding with crosstalk delay elimination

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15th Annual IEEE International ASIC/SOC Conference, ASIC/SOC 2002

作者： Lyuh, Chun-Gi Kim, Taewhan Dept. of Electrical Engineering and Computer Science Advanced Information Technology Research Center KAIST Korea Republic of

ISBN: (纸本)0780374940

In deep-submicron (DSM) technology, minimizing the propagation delay and power consumption on buses are two of the most important design objectives in system-on-chip (SOC) design. In particular, coupling effects between wires on the bus cause serious problems such as crosstalk delay, noise, and power consumption. Most of the previous works on bus encoding are targeted either (1) to minimize the power consumption on bus or (2) to minimize the crosstalk delay, but not both. In this paper, we propose a new bus encoding algorithm which not only minimizes the dynamic power consumption on bus but also eliminates the crosstalk delay. We achieve the combined objective of (1) and (2) by analyzing, formulating and solving the problem of minimizing a weighted sum of the self transition and cross-coupled transition activities on bus in the context of the concept of self-shield encoding (whose fundamental theory is well studied recently in [5]). From experiments using a set of benchmark designs, it is shown that the proposed encoding technique consumes l5.4%-47.4% less power over the existing techniques, while totally eliminating the crosstalk delays. © 2002 IEEE.

关键词： Electric power utilization

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Next generation system software for future high-end computing systems 16

Next generation system software for future high-end computin...

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16th International Parallel and Distributed Processing Symposium, IPDPS 2002

作者： Gao, G.R. Theobald, K.B. Hu, Ziang Wu, Haiping Lu, Jizhu Sterling, T.L. Pingali, K. Stodghill, P. Stevens, R. Hereld, M. Dept. of Electrical and Computer Engineering Univ. of Delaware United States Center for Advanced Computing Research California Institute of Technology United States Dept. of Computer Science Cornell Univ. United States Argonne National Laboratory Univ. of Chicago United States

ISBN: (纸本)0769515738

Future high-end computers will offer great performance improvements over today's machines, enabling applications of far greater complexity. However, designers must solve the challenge of exploiting massive parallelism efficiency in the face of very high latencies across the memory hierarchy. We believe the key to meeting this challenge is the design and implementation of new models and languages which address the problems of parallelism and latency on such machines. This paper presents an overview of our ongoing research toward this goal. Specifically, we will develop a suitable program execution model, a high-level programming notation, and a compiler and runtime system based on the underlying models. These are based on our previous work in parallel multithreaded systems, but are suitably enhanced to meet the needs of future high-end computers. © 2002 IEEE.

关键词： EARTH parallel computing percolation programming models supercomputing

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Memory architectures for embedded systems-on-chip 1

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9th International Conference on High Performance Computing, HiPC 2002

作者： Ranjan Panda, Preeti Dutt, Nikil D. Dept. Of Computer Science and Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi110 016 India Center for Embedded Computer Systems University of California Irvine IrvineCA92697-3425 United States

ISBN: (数字)9783540362654

ISBN: (纸本)3540003037

Embedded systems are typically designed for one or a few target applications, allowing for customization of the system architecture for the desired system goals such as performance, power and cost. The memory subsystem will continue to present significant bottlenecks in the design of future embedded systems-on-chip. Using advance knowledge of the application’s instruction and data behavior, it is possible to customize the memory architecture to meet varying system goals. On one hand, different applications exhibit varying memory behavior. On the other hand, a large variety of memory modules allow design implementations with a wide range of cost, performance and power profiles. The embedded system architect can thus explore and select custom memory architectures to fit the constraints of target applications and design goals. In this paper we present an overview of recent research in the area of memory architecture customization for embedded systems. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Memory architecture

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Pruned multi-angle resolution fast beam-forming

Pruned multi-angle resolution fast beam-forming

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IEEE Sensor Array and Multichannel Signal Processing Workshop, SAME 2002

作者： Yoon, Yeo-Sun Kaplan, Lance M. McClellan, James H. Center for Signal and Image Processing Georgia Institute of Technology School of Electrical and Computer Engineering AtlantaGA30332-0250 United States Dept. of Engineering CTSPS Clark Atlanta University AtlantaGA303 14 United States

ISBN: (纸本)0780375513

Delay-and-sum (DS) beam-forming is one of the basic beam-forming methods, and it is effective for both narrow- And wide-band sources. However, DS beam-forming exhibits high computational complexity. Recently, a fast multistage approximation of DS beam-forming was introduced. In order to further improve the computational efficiency of the fast beam-former, we have integrated a detector into the intermediate stages of the fast algorithm. This detector can save computations by stopping further processing to resolve benign angular sectors that do not contain a coherent source. The joint fast detector beam-former was tested using various wideband signals such as spread spectrum signals used in wireless communications. This technique should provide a useful direction finding solution in wireless communications and target localization applications. In addition, the fast algorithm can find initial values for high resolution direction-of-arrivals estimators such as coherent signal subspace methods. © 2002 IEEE.

关键词： Computational efficiency

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