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International Symposium on communications and information technologies (ISCIT)

作者： Risanuri Hidayat Kobchai Dejhan Phichet Moungnoul Yoshikazu Miyanaga Faculty of Engineering and Research Center for Communication and Information Technology King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand Division of Media and Network technologies Graduate School of Information Science and Technology Hokkaido University Sapporo Japan

A simple CMOS squarer circuit is proposed. The circuit has a Giga Hertz frequency response that has advantages to be used in communication systems. The proposed circuit focuses on the extension to ultra wide bandwidth. The circuit is based on 0.18 mum CMOS technology simulated using PSPICE level 7. The circuit has wide dynamic range, GHz-bandwidth response and low power consumption. The proposed circuit has been simulated with SPICE and achieved -3 dB bandwidth of 10.96 GHz. The power consumption is about 86.51muW with a plusmn 1 V power supply voltage. Simulation result shows that the proposed squarer can accommodate the whole UWB bandwidth.

关键词： CMOS technology Energy consumption Circuit simulation Threshold voltage MOSFETs Bandwidth SPICE CMOS analog integrated circuits Analog circuits Low voltage

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A room modeling method for 3D video

A room modeling method for 3D video

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2008 International Conference on Parallel and Distributed Processing Techniques and Applications, PDPTA 2008

作者： Isshiki, Aya Sakamoto, Ryuuki Kitahara, Itaru Kogure, Kiyoshi Joe, Kazuki Information and Computer Sciences Department Nara Women's University Nara 630-8506 Japan Department of Computer and Communication Sciences Wakayama University Sakaedani 930 Wakayama Wakayama 640-8510 Japan Department of Intelligent Interaction Technologies Graduate School of Systems and Information Engineering University of Tsukuba Tennoudai 1-1-1 Tsukuba Ibaraki 305-8573 Japan ATR Knowledge Science Laboratories Hikaridai 2-2-2 Keihanna Science City Kyoto 619-0288 Japan

ISBN: (纸本)1601320841

This paper proposes a system to reconstruct the 3D shape model of background regions for generating 3D video easily. As the progress of computer vision technologies continues, many 3D video systems have been developed that tend to focus on automatic 3D reconstruction to capture target (foreground) objects. On the other hand, the 3D shapes of background regions such as walls and floors are generally made manually, for example, using 3D modeling software such as CAD. However, the operation is not easy for novices. Our system provides an easy background modeling method for such users. User operations include segmenting multiple background images into several boxes by indi cating their vertices and giving the correspondence of the boxes between multiple images. As a result, the 3D coordinates of the vertices are calculated using a stereo vision algorithm.

关键词： Stereo vision

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DLM: A distributed Large Memory System using remote memory swapping over cluster nodes

DLM: A distributed Large Memory System using remote memory s...

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IEEE International Conference on Cluster Computing

作者： Hiroko Midorikawa Motoyoshi Kurokawa Ryutaro Himeno Mitsuhisa Sato Department of Computer and Information Science Seikei University Musashino Tokyo Japan Graduate School of Systems and Information Engineering University of Tsukuba Tennodai Tsukuba Ibaraki Japan Advanced Center of Computing and Communication Wako Saitama Japan Research Program for Computational Science RIKEN Wako Saitama Japan

Emerging 64 bitOSpsilas supply a huge amount of memory address space that is essential for new applications using very large data. It is expected that the memory in connected nodes can be used to store swapped pages efficiently, especially in a dedicated cluster which has a high-speed network such as 10 GbE and Infiniband. In this paper, we propose the distributed large memory system (DLM), which provides very large virtual memory by using remote memory distributed over the nodes in a cluster. The performance of DLM programs using remote memory is compared to ordinary programs using local memory. The results of STREAM, NPB and Himeno benchmarks show that the DLM achieves better performance than other remote paging schemes using a block swap device to access remote memory. In addition to performance, DLM offers the advantages of easy availability and high portability, because it is a user-level software without the need for special hardware. To obtain high performance, the DLM can tune its parameters independently from kernel swap parameters. We also found that DLMpsilas independence of kernel swapping provides more stable behavior.

关键词： Kernel Arrays Memory management Servers Bandwidth Performance evaluation Benchmark testing

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New PTS Method with Coded Side information Technique for PAPR Reduction in OFDM Systems

New PTS Method with Coded Side Information Technique for PAP...

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International Symposium on communications and information technologies (ISCIT)

作者： Chusit Pradabpet Shingo Yoshizawa Yoshikazu Miyanaga Sorawat Chivapreecha Kobchai Dejhan Faculty of Science and Technology Phranakhon Si Ayutthaya Rajabhat University Phranakhon Si Ayutthaya Thailand Division of Media & Network Technologies Graduate School of Information Science and Technology Hokkaido University Sapporo Japan Faculty of Engineering and Research Center for Communication and Information Technology (ReCCIT) King Mongkut's Institute of Technology Ladkrabang (KMITL) Bangkok Thailand

In this paper, we propose a new PAPR reduction by using a partial transmit sequences (PTS) method with coded side information (SI) technique. These methods are used in an orthogonal frequency division multiplexing (OFDM) system. The OFDM employs orthogonal sub-carriers for data modulation. These sub-carriers unexpectedly present a large peak to average power ratio (PAPR) in some cases. In order to reduce PAPR, the sequence of input data is partitioned into disjoint sub-block of PTS. If number of sub-block increases, high efficiency of PAPR reduction can be obtained. However, a quite large calculation cost must be demanded and thus it is impossible to obtain the optimum PTS. In the proposed method, we introduce a coded side information technique assuming the pseudo-optimum condition into the PTS. The total calculation cost becomes drastically reduced and side information bits for recovering original data in demodulation. In simulation results, the proposed method demonstrated the improvement of PAPR and bit error rate (BER) performance.

关键词： Peak to average power ratio OFDM Partial transmit sequences Bit error rate Interference Digital audio broadcasting Multimedia communication Digital video broadcasting Electronic mail information science

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A GHz analog multiplier for UWB communications

A GHz analog multiplier for UWB communications

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Asia-Pacific Conference on communications

作者： R. Hidayat K. Dejhan P. Moungnoul Y. Miyanaga Faculty of Engineering and Research Center for Communication and Information Technology King Mongkut's Institute of Technology Bangkok Thailand Division of Media and Network technologies Graduate School of Information Science and Technology Hokkaido University Sapporo Japan

ISBN: (纸本)9781424413737

A gigahertz wideband analog multiplier is proposed. The multiplier based on the MOS cascade operation circuit. The inputs are in voltage mode and become in current mode after multiplication. The result shows that the multiplier can be applied for UWB communications. The circuit is based on 0.18 mum CMOS technology simulated using HSPICE with level 49.

关键词： Ultra wideband communication Circuits Bandwidth MOSFETs CMOS technology Paper technology Capacitance Threshold voltage information technology information science

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Abstracts for the 6th Congress of Asian Sleep Research Society

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Sleep and Biological Rhythms 2009年第4期7卷 A1-A49页

作者： Seog Ju Kim In Kyoon Lyoo Yu-Jin Lee Do-Un Jeong Hirohiko Kanai Masanori Ookubo Atsushi Yoshimura Masako Okawa Noto Yamada Takeshi Munezawa Yoshitaka Kaneita Yoneatsu Osaki Hideyuki Kanda Tadahiro Ohtsu Masumi Minowa Kenji Suzuki Susumu Hijuchi Hiroyuki Suzuki Takashi Ohida Takashi Abe Yoko Komada Shoichi Asaoka Yuichi Inoue Jin-Seong Lee Sang-Yong Cho Deependra Kumar Hruda N. Mallick Velayudhan M. Kumar Mahesh K. Kaushik Akihiro Karashima Noiihiro Katayama Mitsuyuki Nakao Ravindra P. Nagendra Sathiamma Sulekha Sathyaprabha T. Narasappa Pradhan Nityanadan Bindu M. Kutty M. Nirmala P. N. Ravindra Basavaraj Ramappa Tubaki T. N. Sathyaprabha D. Sudhakar G. S. Lavekar C. R. Chandrashekar Kazuyoshi Kitaoka Mika Shimizu Sachiko Chikahisa Kazuo Yoshizaki Hiroyoshi Sei Jong-Won Kim Misa Takegami Shin Yamazaki Yasuaki Hayashino Rei Ono Koji Otani Miho Sekiguchi Shinichi Konno Shunichi Fukuhara Antonia J. Jakobson Paul Fitzgerald Russell Conduit Xin Shirley Li Siu Ping Joyce Lam Wai Man Mandy Yu Yun Kwok Wing Kazue Okamoto-Mizuno Koh Mizuno Mituaki Yamamoto Shuichiro Shirakawa Hirokazu Doi Mikako Kato Kazuyuki Shinohara Masako Tamaki Shiori Matsuda Katsuo Yamazaki Tadao Hori Keiko Ogawa Kazumi Takahashi Kunio Kitahama Katuo Yamazaki Yoshimasa Koyama Kohei Shioda Yugo Ueda Yukiko Nakamura Clara Inoue Kazushige Goto Sunao Uchida Yuko Morita Yoshiko Honda Tohru Kodama Mari Hagihara Toru Nakajima Masato Saito Yoshihiko Koga Shinichiro Tanaka Hiroshi Yamadera Madoka Takahara Sachiko Suwa Minoru Onozuka Sadao Sato Fumiharu Togo Taiki Komatsu Takeshi Mitani Jongbae Choi Bin Zhang Taeko Sasai Hiromi Mitsubayashi Mitsuhiro Ohtsu Isao Hasegawa Tatsuya Ishii Akira Komori Asami Suzuki Yue Nakahara Mitsuyasu Hiroki Mariko Nakauma Nobuo Someya Tomomasa Ochiai Shouhei Komori Rayleigh Ping-Ying Chiang Zai-Ting Yeh Seong T. Kim Seung H. Yoon Jeong S. Kwon Jong H. Choi Hyung J. Ahn Youngsoo Kim Bolortuya Yunren Lichao Chen Radhika Basheer Robert W. Mccarley Robert E. Strecker Makoto Honda Tetsuaki Arai Miyuki Fukazawa Yutaka Honda Kuniaki T Department of Psychiatry Gachon University of Medicine and Science Incheon Republic of Korea Department of Psychiatry Seoul National University Seoul Republic of Korea Department of Neuropsychiatry and Center for Sleep and Chronobiology Seoul National University Hospital Seoul Republic of Korea Department of Neuropsychiatry Seoul National University Hospital Seoul Republic of Korea Seoul National University Hospital Seoul Republic of Korea Department of Psychiatry Shiga University of Medical Science Otsu Japan Division of Public Health Department of Social Medicine Nihon University School of Medicine Tokyo Japan Department of Public Health Nihon University School of Medicine Tokyo Japan Division of Environmental and Preventive Medicine Department of Social Medicine Faculty of Medicine Tottori University Yonago Japan Department of Hygiene and Preventive Medicine Fukushima Medical University Fukushima Japan Department of Public Health Showa University School of Medicine Tokyo Japan Faculty of Humanities Seitoku University Matsudo Japan Section on Behavioral Science Division of Clinical Research National Hospital Organization Kurihama Alcoholism Center Yokosuka Japan Department of Otolaryngology Second Hospital Fujita Health University Nagoya Japan National Hospital Organization Kurihama Alcoholism Center Kanagawa Japan Metropolitan Police Department Criminal Investigation Laboratory Tokyo Japan Japan Somnology Center Neuropsychiatrie Research Institute Tokyo Japan Department of Somnology Tokyo Medical University Tokyo Japan Japan Somnology Center Neuropsychiatric Research Institute Tokyo Japan Department of Somnology Tokyo Medical and Dental University Tokyo Japan Center for Sleep and Chronobiology Department of Psychiatry and Behavioral Science Seoul National University College of Medicine Seoul Republic of Korea Department of Psychiatry and Behavioral Science Center for Sleep and Chronobiology Seoul Republic of Korea Department of Physiology Al

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A new PAPR reduction in OFDM-WLAN systems by hybrid algorithm of PTS and APPR methods

A new PAPR reduction in OFDM-WLAN systems by hybrid algorith...

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Asia-Pacific Conference on communications

作者： C. Pradabpet S. Yoshizawa Y. Miyanaga K. Dejhan Faculty of Science and Technology Phranakhon Si Ayutthaya Rajabhat University Phranakhon Si Ayutthaya Thailand Division of Media & Network Technologies Graduate School of Information Science and Technology Hokkaido University Sapporo Japan Faculty of Engineering and Research Center for Communication and Information Technology King Mongkut's Institute of Technology Bangkok Thailand

ISBN: (纸本)9781424413737;1424413737

In this paper, we propose a new PAPR reduction technique by a hybrid algorithm based on a partial transmit sequence (PTS) and adaptive peak power reduction (APPR) methods. This technique is used in a system based on orthogonal frequency division multiplexing (OFDM). OFDM has many orthogonally modulated subcarriers which unexpectedly give a large peak to average power ratio (PAPR) and tends to reduce the power efficiency of a RF amplifier. A sequence of input data is rearranged by PTS for the reduction of PAPR and then fed to APPR process in the proposed system. The APPR method controls the peak level of the modulation signal by an adaptive algorithm. It reduces modulation signals over a predefined range. A proposed reduction method consists of these two methods and realizes both advantages at the same time. In simulation results, the proposed method shows the improvement on PAPR and also the high performance on bit error rate performance of an OFDM system.

关键词： Peak to average power ratio Partial transmit sequences OFDM modulation Bit error rate Digital audio broadcasting Multimedia communication Digital video broadcasting information science Power engineering and energy information technology

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Verilog Coding Style for Efficient Synthesis in FPGA

Verilog Coding Style for Efficient Synthesis in FPGA

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2005 International Conference on Computer Design, CDES'05

作者： Thapliyal, Himanshu Srinivas, M.B. Rao, Rameshwar Arabnia, Hamid R. Center for VLSI and Embedded System Technologies International Institute of Information Technology Hyderabad-500019 India Department of Electronics and Communication Engineering Osmania University Hyderabad 500 007 India University of Georgia Department of Computer Science 415 Graduate Studies Research Center Athens GA 30602-7404 United States

ISBN: (纸本)9781932415544

In this paper, we discuss efficient coding and design styles using Verilog from synthesis point of view. These techniques can be greatly helpful for any digital designer writing designs having speed and area considerations in his mind. Different important techniques have been addressed to enable the designer to write synthesizable codes. Apart from the synthesis, techniques are also discussed to improve the speed and area of netlist generated from the RTL codes. The prominent problem faced by the designer related to synthesis of Division and Modulus operator in FPGA has been discussed and an efficient solution has been provided.

关键词： Field programmable gate arrays (FPGA)

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Cinematized reality: Cinematographic camera controlling 3D free-viewpoint video

Cinematized reality: Cinematographic camera controlling 3D f...

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Visual Media Production, 2005. CVMP 2005. The 2nd IEE European Conference on

作者： Kitahara Sakamoto Satomi Tanaka Kogure ATR Intelligent Robotics and Communication Laboratories Keihanna Science City Kyoto Japan Department of Ingelligent Intaraction Technologies Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki Japan Department of Knowledge Science Japan Advanced Institute of Science and Technology Nomi Ishikawa Japan

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The Social Affordances of the Internet for Networked Individualism

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Journal of Computer-Mediated communication 2006年第3期8卷

作者： Barry Wellman Anabel Quan-Haase Jeffrey Boase Wenhong Chen Keith Hampton Isabel Díaz Kakuko Miyata In 1965 moved from his Bronx High School of Science slide rule to IBM cards and an 029 keypunch in the bowels of Harvard University. Since then he's been primarily interested in the interplay between large-scale social processes and how people use technology to be connected at work and in the community. His NetLab research network is trying to get a handle on how the Internet fits into everyday life. Wellman founded the International Network for Social Network Analysis in 1976. He is a recent Chair of the Community section of the American Sociological Association has been nominated for the Chair of the Communication and Information Technology section of the ASA the Virtual Community focus area leader for SIGGROUP/ACM and a Executive Cmmittee member of the Association for Internet Researchers. Wellman's (co)edited books are: Social Structures: A Network Approach (2d ed CSPI 2003) Networks in the Global Village (Westview Press 1999) and The Internet in Everyday Life (Blackwell Publishers 2002). Address:Centre for Urban & Community Studies University of Toronto 455 Spadina Avenue Toronto Canada M5S 2G8. Fax: +1-416-978-7162 Address:Centre for Urban & Community Studies University of Toronto 455 Spadina Avenue Toronto M5S 2G8 Canada. Address:Massachusetts Institute of Technology 77 Mass. Ave. Room 9-522 Cambridge MA 02139. Address:IN3 Av. Tibidabo 47 08035 Barcelona Spain. Phone: +*** Fax: +***. Address:Department of Sociology Meiji Gakuin University 1-2-37 Shirokanedai Minato-ku Tokyo 108-8636 JAPAN. Phone: +81-3-5421-5565 Fax: +81-3-5421-5697. Doctoral student at the Faculty of Information Studies University of Toronto. She has been a Fellow of the Knowledge Media Design Institute and the McLuhan Program in Culture and Technology. Her articles address the nature of Internet-related social change for social integration and information flow. Her articles have examined the implications of these changes for communities and her thesis focuses on organizations. University of Toronto doctoral

We review the evidence from a number of surveys in which our NetLab has been involved about the extent to which the Internet is transforming or enhancing community. The studies show that the Internet is used for connectivity locally as well as globally, although the nature of its use varies in different countries. Internet use is adding on to other forms of communication, rather than replacing them. Internet use is reinforcing the pre-existing turn to societies in the developed world that are organized around networked individualism rather than group or local solidarities. The result has important implications for civic involvement.

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