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作者： Ohtsuka, Satoshi Sasaki, Nobuyuki Hasegawa, Sadao Harakawa, Tetsumi Department of Information and Computer Engineering Gunma National College of Technology 580 Toriba-machi Maebashi 371-8580 Japan Department of Information System Engineering Tsukuba University of Technology 4-12-7 Kasuga Tsukuba 305-0821 Japan Japan Braille Library 3-4 Takadanobaba 1-Chome Shinjuku-ku 169-8586 Japan Department of Information Engineering Maebashi Institute of Technology 460-1 Kamisadori-machi Maebashi 371-0816 Japan Gunma National College of Technology Japan Tsukuba University of Technology Japan Japan Braille Library Japan Maebashi Institute of Technology Japan

New type of remote support system for handicapped persons is proposed in this paper. Body-Braille system is consisted of six small vibrators which have been used in cellular phones. And this system is put on the any part of human body. Supports method are similar to usual Braille, and the impaired persons acquire the communication or information about circumferences by reading the vibration patterns on the skin which are consisted of six on-off vibrations of small motors. This paper has shown the remote support system and experiment in which Body-Braille system and cellular phone are connected to realize its functions. The deaf-blind persons have cellular phone with small camera, and remote supporter can get the necessary information by receiving images from the phone, and then send recognition result to subject using Body-Braille. From the results of the experiment, proposed support system has been clarified to be effective.

关键词： Human rehabilitation equipment

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Design and analysis of a self-tuning proportional and integral controller for active queue management routers to support TCP flows

Design and analysis of a self-tuning proportional and integr...

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INFOCOM 2006: 25th IEEE International Conference on computer Communications

作者： Xiong, Naixue Défago, Xavier Jia, Xiaohua Yan, G. He, Yanxiang School of Information Science Japan Advanced Institute of Science and Technology State Key Lab. of Software Engineering Computer School Wuhan University School of Information Science Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi Ishikawa 923-1292 Japan Kowloon Hong Kong IEEE IEEE Communication Society Department of Computer Science Wuhan University City University of Hong Kong Kowloon Hong Kong School of Computer Science and Technology Wuhan University of Science and Technology China SMIEEE

ISBN: (纸本)1424402212

Active Queue Management (AQM) is an effective method used in Internet routers for congestion control, and to achieve a tradeoff between link utilization and delay. The de facto standard, the Random Early Detection (RED) AQM scheme, and most of its variants use average queue length as a congestion indicator to trigger packet dropping. This paper proposes a novel AQM algorithm, called Self-tuning Proportional and Integral RED (SPI-RED), as an extension of RED. SPI-RED is based on a Self-tuning Proportional and Integral controller, which not only considers the average queue length at the current time point, but also takes into consideration the past average queue lengths during a round-trip time. Furthermore, we give theoretical analysis of the system stability and give guidelines for the selection of feedback gains for the TCP/RED system to stabilize the average queue length at a desirable level. Extensive simulations have been conducted with ns2. The simulation results have demonstrated that the proposed SPI-RED algorithm outperforms the existing AQM schemes in terms of drop probability and stability.

关键词： Queueing networks

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Designing trust with software agents: A case study

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Journal of information, Communication and Ethics in Society 2006年第1期4卷 37-48页

作者： Bernaer, Stijn Meganck, Martin Vanden Berghe, Greet de Causmaecker, Patrick KaHo St.-Lieven Department of Industrial Engineering 9000 Gent Gebr. Desmetstraat 1 Belgium Katholieke Universiteit Leuven Campus Kortrijk Computer Science and Information Technology 8500 Kortrijk E. Sabbelaan 53 Belgium

In this paper, we will address privacy and trust issues that arise in more advanced software systems. Though a lot of information is currently available in electronic form, not all of it should widely be accessible to everybody. The involved parties need full control on how their data are used and who has access. If the system consists of autonomous software agents, this problem requires extra attention and new working principles. We illustrate this in the case of a communication platform for multimodal transport. The major aim of the communication platform is to enhance exchanging information and to ultimately improve organisation/collaboration within the transport sector. A better informed view of the transport sector will facilitate better considered decisions for users of the communication platform. The software system merits credibility by accurately modelling all the relevant real world interactions of potential users of the system. We opted for a connectivity solution in which software agents act as representatives of the parties involved. All agents can be equipped with human-like skills and qualities such as intelligence, autonomy, and the ability to cooperate, coordinate and negotiate. We demonstrate how cooperation between parties can be achieved while respecting their sensitivity concerning information. © 2006, Emerald Group Publishing Limited

关键词： Privacy Software agents Trust

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A new approach to the harmonic analysis of SPWM waves

A new approach to the harmonic analysis of SPWM waves

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2006 IEEE International Conference on Mechatronics and Automation, ICMA 2006

作者： Lin, Weixing Faculty of Information Science and Technology Ningbo University Ningbo 315211 China Department of Systems and Computer Engineering Carleton University Ottawa Ont. K1S 5B6 Canada

ISBN: (纸本)1424404665

The Sinusoidal Pulse Width Modulation (SPWM) wave is very important for the design of frequency and voltage adjustable DC to AC inverters. Currently, SPWM waves are usually generated through the pulse width modulation (PWM) pins of a singer-chip microcomputer or digital signal processor (DSP). In order to achieve desired SPWM waves and know them better, it is essential to analyze their harmonic components. In this paper, we introduce a new approach to the harmonic analysis of SPWM waves based on Discrete Fourier Series (DFS) and the area equivalent principle. The developed method is convenient and the results of simulation and experiments are more accurate compared to conventional methods. The advantages of our approach are confirmed by the simulation and experimental results. ©2006 IEEE.

关键词： Pulse width modulation

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Au efficient capacity allocation scheme of periodic polling services for a multimedia traffic in an IEEE802.16 system

Au efficient capacity allocation scheme of periodic polling ...

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2006 IEEE International Conference on Mobile Ad Hoc and Sensor Sysetems, MASS

作者： Seo, Jun-Bae Kim, Se-Jin Lee, Hyong-Woo Cho, Ong-Ho School of Information Technology and Engineering University of Ottawa CBY-A514 161 Louis Pasteur Ottawa ON K1N 6N5 Canada Department of Computer and Information Science Korea University Chochiwon Choongnam 339-700 Korea Republic of Department of Electronics and Information Engineering Korea University Chochiwon Choongnam 339-700 Korea Republic of

ISBN: (纸本)1424405076

In this paper, we consider a capacity allocation scheme of periodic polling services for a multimedia traffic in an IEEE802.16 system. In the scheme of our interest, a base station assigns a subscriber station contiguous M unlink subframes for uplink traffic transmission and o vacation frames for saving power and opportunities for other subscriber stations. Among M uplink suhframes, the subscriber station returns its remaining frames, when its queue is empty. The returned bandwidth will then he allocated to other subscriber stations. We carry out an analysis on this queuemg system, by using a generating function approach. The performance of the proposed capacity allocation scheme is presented in terms of the first moment of queue length, the mean vacation and transmission period. We also compare its performance with that of a deterministic capacity allocation scheme, in which allocated bandwidth would not be returned. © 2006 IEEE.

关键词： Telecommunication traffic

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Queueing behavior of IEEE802.16 random access protocol for sporadic data transmissions

Queueing behavior of IEEE802.16 random access protocol for s...

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15th International Conference on computer Communications and Networks 2006, ICCCN 2006

作者： Seo, Jun-Bae Lee, Hyong-Woo Cho, Ong-Ho School of Information Technology and Engineering University of Ottawa 161 Louis Pasteur CBY-A514 Ottawa ON K1N 6N5 Canada Department of Electronics and Information Engineering Korea University Chochiwon Choongnam 339-700 Korea Republic of Department of Computer and Information Science Korea University Chochiwon Choongnam 339-700 Korea Republic of

ISBN: (纸本)1424405726

In this paper, we consider the queueing performance of IEEE802.16 random access protocol for sporadic data transmission with a binary exponential backoff algorithm. The random access protocol of IEEE 802.16 is physically based on orthogonal frequency-division-multiple-access and code-division-multiple-access with time division duplexing mode, i.e., multichannel- and multicode- slotted Aloha. In a medium access control layer, the protocol is a type of demand-assigned multiple access with and without piggyback, in which a bandwidth request may be allowed either before transmitting data or at the end of data transmission. We analyze the queueing performance of the random access protocol without piggyback, which is nonexhaustive service of an M/G/1 type queue with set-up times by taking a binary exponential backoff mechanism into consideration. The performance is presented according to traffic load, number of subscriber stations and retransmission probability. © 2006 IEEE.

关键词： Queueing networks

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Shock Hugoniot Compression Data for Several Bio‐Related Materials

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AIP Conference Proceedings 2006年第1期845卷 1547-1550页

作者： K. Nagayama Y. Mori Y. Motegi M. Nakahara 1Department of Aeronautics and Astronautics Faculty of Engineering Kyushu University Fukuoka 812‐8581 Japan 2Department of Computer and Communication Faculty of Engineering Fukuoka Institute of Technology Fukuoka 811‐0295 Japan

Shock wave data for several bio‐related materials have been obtained. Plane and steady shock waves have been induced by using a modest compressed gas gun facility. Shock pressure covered in this study ranges at least up to 1 GPa. In order to realize the sensitive detection of shock front in these materials in this relatively low pressure region, an optical method has been developed by our group. Optical prism was placed on the sample such that incident laser beam is totally reflected at the prism sample interface. Samples used in the experiment include gelatin with different initial density, NaCl aqueous solution, and finally chicken breast meat. Shock data obtained in the present study are compared with the shock Hugoniot curve for water. It is found that slope of the shock velocity‐particle velocity Hugoniot compression curve for all the materials tested is almost 2. While value of the intercept of the relationship, corresponding to the sound velocity, is apparently dependent on the material and ambient temperature.

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Rough sets handling missing values probabilistically interpreted

Rough sets handling missing values probabilistically interpr...

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High-Power Diode Laser technology and Applications IV

作者： Nakata, Michinori Sakai, Hiroshi Faculty of Management and Information Science Josai International University 1 Gumyo Togane Chiba 283-8555 Japan Department of Mathematics and Computer Aided Sciences Faculty of Engineering Kyushu Institute of Technology Tobata Kitakyushu 804-8550 Japan

ISBN: (纸本)0819461466

We examine methods of valued tolerance relations where the conventional methods based on rough sets are extended in order to handle incomplete information. The methods can deal with missing values probabilistically interpreted. We propose a correctness criterion to the extension of the conventional methods. And then we check whether or not the correctness criterion is satisfied in a method of valued tolerance relations. As a result, we conclude that the method does not satisfy the correctness criterion. Therefore, we show how to revise the method of valued tolerance relations so that the correctness criterion can be satisfied. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Rough set theory

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Fabrication and characterization of capless In0.52Al0.48As/In0.53Ga0.47As HEMTs

Fabrication and characterization of capless In0.52Al0.48As/I...

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作者： Jang, Jae-Hyung Adesida, Ilesanmi Micro and Nanotechnology Laboratory Department of Electrical and Computer Engineering University of Illinois at Urbana Champaign Urbana IL 61801 United States Department of Information and Communications Gwangju Institute of Science and Technology 1 Oryong-dong Bukgu Gwangju 500-712 Korea Republic of

Capless high electron mobility transistors (HEMTs) were fabricated and their DC and RF performances were characterized. Capless HEMTs did not have highly doped InGaAs cap layer so that gate recess process was not required in the fabrication of capless HEMTs. The electrical performances of the capless HEMTs were compared with those of conventional HEMTs with highly doped InGaAs cap layer. A typical 0.2 μm capless HEMT exhibited a maximum transconductance of 805 mS/mm, a threshold voltage of -0.5 V, and a unity current gain cut-off frequency (fT) of 137 GHz. Capless HEMTs exhibited improved device uniformity compared with conventional HEMTs fabricated by wet gate recess technology. Copyright © 2006 The Institute of Electronics, information and Communication Engineers.

关键词： High electron mobility transistors

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Recent trend of electromagnetic theory in advanced technology and society

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IEEJ Transactions on Fundamentals and Materials 2006年第1期126卷 5-7页

作者： Sato, Toru Miyazaki, Yasumitsu Hayakawa, Masashi Koshiba, Masanori Department of Communications and Computer Engineering Graduate School of Informatics Kyoto University Dakyo-ku Kyoto 606-8501 Department of Electronics and Information Engineering Aichi University of Technology Umanori 50-2 Nishihazama-cho Gamagori 443-0047 University of Electro-Communications 1-5-1 Chofugaoka Chofu 182-8585 Division of Media and Network Technologies Hokkaido University N14 W9 Kita-ku Sapporo 060-0814

Electromagnetic theory is now a universal tool used in a wide variety of leading-edge applications such as nano-technology and environmental monitoring. Under the Technical Committee on Electromagnetic Theory (EMT), three investigating committees are now running to investigate particular subjects;namely, nanometer-electromagnetic waves and X-ray fields technology, natural electromagnetic phenomena and electromagnetic theory, and computational electromagnetics. Recent trends in these fields are briefly overviewed.

关键词： Electromagnetism

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