IEEE Communications Quality & Reliability (CQR) International Workshop on " Telecommunications World Class Quality & Reliability for World Class Events", IEEE Contribution Award, IEEE Communications Quality & Reliability (CQR)
東洋大学紀要 自然科学篇 = JOURNAL OF TOYO UNIVERSITY NATURAL SCIENCE 62 69-82 Mar 2018
Elderly dementia would be considered as one of serious social issues in near future inJapan. A nonlinear regression method by support vector machine (SVM） was appliedto search factors related to patient rates of 47 prefectures among 34 kinds of l...
Current Approaches in Applied Artificial Intelligence - 28th International Conference on Industrial, Engineering and Other Applications of Applied Intelligent Systems, IEA/AIE 2015, Seoul, South Korea, June 10-12, 2015, Proceedings 120-130 2015 [Refereed]
17th International Conference on Advanced Information Networking and Applications (AINA'03), March 27-29, 2003, Xi'an, China 2003-January 632-637 2003 [Refereed]
Takahiro Komine,Akihiko Machizawa,Shin-ichi Nakagawa,Fumito Kubota,Yasuo Tan
Information Networking, Wireless Communications Technologies and Network Applications, International Conference, ICOIN 2002, Cheju Island, Korea, January 30 - February 1, 2002, Revised Papers, Part II 521-528 2002 [Refereed]
Information Networking, Wireless Communications Technologies and Network Applications, International Conference, ICOIN 2002, Cheju Island, Korea, January 30 - February 1, 2002, Revised Papers, Part II 351-358 2002 [Refereed]
Information Networking, Wireless Communications Technologies and Network Applications, International Conference, ICOIN 2002, Cheju Island, Korea, January 30 - February 1, 2002, Revised Papers, Part I 146-156 2002 [Refereed]
Japanese Journal of Hygine 48(5) 992-999 Dec 1993 [Refereed]
To clarify the alteration of serum immunoglobulin levels with age, serum immunoglobulin and other parameters (age, symptoms, blood biochemical parameters, etc.) of inhabitants (213 persons; 63 men, 150 women) of a remote island in Shimane Prefectu...
VoIP（Voice over Internet Protocol）は，次世代ネットワークの中心技術だが，P2P，SIP等の複合技術であり，ボランティアベースでさまざまな実装が試みられている．特にWebとの連携，不特定多数のユーザの要求に対応するオンラインゲームなど，本技術の可能性について，先日開催されたVoIP Conference 2008での発表内容を元に本技術の最新動向を解説する．なお，活発に行われたカンファレンスの模様なども写真を交えて報告する．
Layer2 tagging based multilayered network is becoming popular and useful solution for the congestions of requests and policies especially on the exchange points of the Internet and Experimental Testbeds. Firstly, the flexibility and usefulness of ...
IEICE technical report. Information networks 106(578) 501-506 Mar 2007
When a IP Multicast network is constructed on switch-based network, a lot of broadcasts of the multicast packet are generated. For solving this problem, IGMP Snooping is proposed, and it is implemented on various switches. However, some switches h...
IPSJ SIG technical reports 2006(50) 85-90 May 2006
IP multicast is the most efficient transport method for many to many data, especially in case of ten thousand sending and receiving pairs. We managed to succeed as the first case in the world for Mega-order send-receive pairs using L2 IP multicast...
IEICE technical report. Information networks 105(87) 29-33 May 2005
Survey for detecting the factors which have influences for Ubiquitous Audio Analog wave transmissions suggested that; DC current cutting circuit on each devices were the most dominant. That factor modified the wave phase changing at the low-freque...
Technical report of IEICE. EA 104(615) 51-56 Jan 2005
To improve the quality of hearing for those with hearing loss in the high frequency range, we have researched the low frequency signals of audio amplifiers. we examined the new measuring method of audio signals with high bit sampling method. As th...
情報処理学会研究報告高度交通システム（ITS） 2004(114) 157-162 Nov 2004
Micro Ethernet Connecter is a one of the state of the art device for expanding themobile computer data bus. To examine the possibility of the application into sensornetworks and IT-home-electronics, some test samples were tried as the prototype an...
Technical report of IEICE. TM 103(446) 71-74 Nov 2003
In WLAN, the jitter characteristics is different from wired LAN network's one. That cause is the fundamental access method of WLAN, CSMA/CA. In order to verify the characteristics, we measured in the WLAN include an access point using software and...
Technical report of IEICE. TM 103(446) 67-70 Nov 2003
When performing network measurement, higher accuracy of time is required with in the environment of increased network speed. However, in general personal computer (PC), the internal time source is based on a crystal oscillator without temperature ...
In WLAN, the jitter characteristics is different from wired LAN network's one. That cause is the fundamental access method of WLAN, CSMA/CA. In order to verify the characteristics, we measured in the WLAN include an access point using software and...
When performing network measurement, higher accuracy of time is required with in the environment of increased network speed. However, in general personal computer (PC), the internal time source is based on a crystal oscillator without temperature ...
近年大容量ハードディスク等の低価格化大容量化が加速している。発表者らはわが国におけるＷｅｂコンテンツの容量推定を行った。超大容量通信回線を維持するコストと一時的な情報到達性からモデルを比較し、ユビキタス情報モビリティのための検討を行った。Recently, portability and cost of the hard disks for the mobile computer is getting more cost-effective. The authors tried to es...
ITO Atsushi, NAGATA Hiroshi, KIMURA Mieko, NAKAGAWA Shin-ichi, ASAMI Toru
IPSJ SIG Notes 2003(54) 7-12 May 2003
We propose a system for gathering imformation of Health and Food from Web by using Metadata description technique since these information is widely expected by people who take care their health. Recently, World Wide Web is widely used for both pro...
NAGATA Hiroshi, ITO Atsushi, KIMURA Mieko, NAKAGAWA Shin-ichi, ASAMI Toru
IEICE technical report. Internet Architecture 103(62) 1-6 May 2003
We investigated homepages of national research institutes, listed companies and famous unlisted companies in Japan to identify whether and what kinds of health and foods information are provided in the HPs. It was identified more than 21 percents ...
IEICE technical report. Information networks 102(693) 53-58 Feb 2003
Real-time applications, such as VoIP and Video Conference, have been widely introduced to the Internet. We propose Packet Merge technique to improve QoS degradation caused by many and small packets that sending by real-time application. In this pa...
The Journal of the Japan Society for Respiratory Care and Rehabilitation 12(3) 308-312 2003
<p>離島遠隔医療通信ネットワークシステムの現状と実用化における諸問題について，鹿児島県奄美大島の南端にある与路島へき地診療所と鹿児島大学医学部とを一部無線LAN（Local Area Network）を使って結んだ離島遠隔医療通信ネットワーク実験の過程から報告する．ネットワーク操作の省力化・簡便化，ネットワーク網の横断化・拡張性の強化・低コスト化といった課題とともにシステムの開発において重要なことは「身近で頼れる道具」として全ての関係者に存在を認識してもらうことであるとわれわれは考える．...
To estimate the future amount of the Next Generation Internet traffic model, we conducted a survey, in 2001, of the World Wide Web homepage contents amount which educational and academic institutions held in two prefectures each with a population ...
IEICE technical report. Internet Architecture 102(361) 1-6 Oct 2002
With its increasing demand, today's network is facing to deal with a large amount of circuit capacity. Since bandwidth of access networks becomes a few Mbps now with ADSL networks and others, that of backbone networks exceeds 10 Gbps. For that kin...
Real-time applications, such as VoIP and Video Conference, have been widely introduced to the Internet. Usually a realtime application stream consist of many and small size packets per unit of time. It may cause a QoS reduction on some routers. In...
Communications Research Laboratory (CRL) proposed the QHD (Quadruple HDTV: 3840^* 2048 pixels) format, which has twice as much pixels in both vertical and horizontal directions. Both CRL and Victor Company of Japan, Ltd. have co-developed camera s...
Technical report of IEICE. CQ 102(191) 65-69 Jul 2002
Communications Research Laboratory (CRL) proposed the QHD (Quadruple HDTV: 3840* 2048 pixels) format, which has twice as much pixels in both vertical and horizontal directions. Both CRL and Victor Company of Japan, Ltd. have co-developed camera sy...
IPv6 network environment realize the NGI (Next Generation Internet) where various devices can be connected to. Such network accessible devices are expected to be used on the Internet in new innovative ways. We have already proposed NADIA(Network A...
Komine Takahiro, Machizawa Akihiko, Nakagawa Shin-ichi, Kubota Fumito, Tan Yasuo
IPSJ SIG Notes 2002(32) 145-149 Mar 2002
We have been developing the Next Generation remote lecture system that real-time transmits "high presence" audio/visual images, without having any disturbance in a long distance transmission. We figured out what functions are required to perform t...
This Paper proposes a development of DVTS(Digital Video Transport System): real time high video/audio quality communication tool focused on a high speed network using portable and mobile notebook computers. Notebook computers has limited availabil...
In the Internet, becase of its huge scale and distributed administration, it is sometime difficult to measure internal states of the network directly, and thus, statistical/indirect ways to infer network-internal characteristics from end-to-end me...
IEICE technical report. Information networks 101(639) 9-15 Feb 2002
This paper propose Multicast routing performance evaluation scheme using the PC based router. It is well known that most of CPU's instruction throughput is consumed in multicast traffic by interface's interrupts and memory copy. We measured PC's p...
The Internet is a information distribution foundation, where Web servers deliver various types of data resources. The technology has caused the drastic change of information storage and delivery system so that users can retrieve what they need fro...
情報処理学会研究報告インターネットと運用技術（IOT） 2001(111) 127-131 Nov 2001
日本における遠隔病理診断と遠隔顕微鏡のニーズに関して厚生労働省の統計データ等を用いて分析した．また既存の遠隔顕微鏡の欠点である動画伝送を克服するために，DVTSおよびD1 over IPを利用した新しい遠隔顕微鏡システムの開発を行った．CEATEC2001等の実験を通して，本システムの実用性を確認しつつある．DVTSは遠隔病理診断のみならず，超音波検査や内視鏡検査の遠隔診断にも活用できる可能性がある．We analysed the status and needs of intra-ope...
情報処理学会研究報告インターネットと運用技術（IOT） 2001(111) 97-103 Nov 2001
厚生労働省の統計データをもとに，X線写真のデジタル化の推移を明らかにするとともに，デジタル化の現状分析を行った．また放射線画像の発生数やデータ量を分析した．これらの結果から，中小病院や診療所では，インハウスのPACSを導入するよりもASP/IDCを利用したほうが有利であることが示唆された．ASP/IDCが医療に与える影響は医用画像のデジタル化の推進のみに留まらず，医療のあり方そのものにも影響を与える可能性がある．The transition and the current state of...
情報処理学会研究報告. QAI, [高品質インターネット] 2001(111) 151-158 Nov 2001
We analysed the status and needs of intra-operational pathological diagnosis using statistical data of Health, Labor and Welfare Ministry and Pathological Society of Japan. And then we designed and implemented a new remote microscope system by whi...
情報処理学会研究報告. QAI, [高品質インターネット] 2001(111) 121-128 Nov 2001
The transition and the current state of digitalization of X-ray photographs was analyzed based on statistical data of Ministry of Health, Labor and Welfare. Also, the number of medical images in radiology and the amount of digital data of them wer...
情報処理学会研究報告ヒューマンコンピュータインタラクション（HCI） 2001(108) 47-54 Nov 2001
IPv6による次世代インターネットでは，グローバルなIPアドレスが大量に利用可能となるため，様々なデバイスがネットワーク対応になると予想されており，そのネットワークデバイスを管理する技術が求められている．様々なネットワークデバイスを協調的に動作させるためには，デバイス特性の記述やそれを用いた協調的なインターフェース機能の実現が必要となる．それを実現する手法として，XMLを用いたデバイス特性の構造化記述を設計した．その基本概念と記述仕様について述べる．With the next genera...
情報処理学会研究報告モバイルコンピューティングとユビキタス通信（MBL） 2001(108) 39-45 Nov 2001
Being accompanied by the recently widespread Internet, computer networks are becoming an indispensable tool for communication. On the other hand, more and more devices other than computers, such as Personal Digital Assistants(PDAs)or cellular phon...
IEICE technical report. Internet Architecture 101(440) 123-130 Nov 2001
We analysed the status and needs of intra-operational pathological diagnosis using statistical data of Health, Labor and Welfare Ministry and Pathological Society of Japan. And then we designed and implemented a new remote microscope system by whi...
IEICE technical report. Internet Architecture 101(440) 93-100 Nov 2001
The transition and the current state of digitalization of X-ray photographs was analyzed based on statistical data of Ministry of Health, Labor and Welfare. Also, the number of medical images in radiology and the amount of digital data of them wer...
IEICE technical report. Information networks 101(413) 21-25 Nov 2001
As many careers enter the market, the low-priced connection service for homes about a few Mbps with xDSL method began to progress quickly. Furthermore, some careers have begun the service for homes toward realization of FTTH (Fiber to the Home). F...
Thanks to rapid progress in electronic commerce and the like on the Internet, data has been managed and authenticated using time information. That makes various servers to pursue time accuracy that depends on its synchronization method. NTP has be...
Communication experiments with IP_V6, which is the next generation protocol, are now underway. In this paper, we will examine a remote control technology that makes full use of the characteristics of IP_V6 and describe how to design a real-time co...
IEICE technical report. Data engineering 101(191) 55-62 Jul 2001
In this paper, we describe our super high-quality video transport systems on the Internet. We have researched and developed technologies to transport high-quality video images such as DV format, D1 format and HDTV format which have higher quality ...
IEICE technical report. Data engineering 101(191) 47-53 Jul 2001
Thanks to rapid progress in electronic commerce and the like on the Internet, data has been managed and authenticated using time information. That makes various servers to pursue time accuracy that depends on its synchronization method. NTP has be...
IEICE technical report. Data engineering 101(191) 41-46 Jul 2001
Communication experiments with IPv6, which is the next generation protocol, are now underway. In this paper, we will examine a remote control technology that makes full use of the characteristics of IPv6 and describe how to design a real-time cont...
ASAMI Tohru, YAMAZAKI Katsuyuki, ITO Atsushi, NAKAGAWA Shin-ichi
IEICE technical report. Information networks 100(621) 15-22 Feb 2001
This paper presents a basic design and principles of an FQDN-based Mobile Internet Architecture, where a host is identified in the Internet only by its FQDN (Fully Qualified Domain Name), which is unique in the Internet including the enterprise ne...
Technical report of IEICE. PS 100(498) 65-70 Dec 2000
Generally, heaviness and burstiness are characteristic of realtime communications. This means that realtime communications decrease the quality of the other communications. In this paper, wepropose the new network-friendly datagram splitting and s...
Technical report of IEICE. CQ 100(93) 77-82 May 2000
The DV over IP has been highly noticed as a way to transmit high quality pictures through the Internet. We have made experiments transmitting pictures by using this DV over IP between Toronto, Canada and CRL, Tokyo, in cooperated with CRC in Canad...
Sugiura Kazunori, Nakagawa Shin'ichi, Ogawa Akimichi, Nakamura Osamu, Murai Jun
IEICE technical report. Communication systems 99(620) 19-24 Feb 2000
This paper focuses on the real-time transmission of the video and audio through bradband Internet infrastructure. We developed Internet-aware collaborative video transmission mechanism using consumer DV. Smoothing the bursty traffic generated by t...
IEICE technical report. Communication systems 99(620) 13-17 Feb 2000
In the large-scale ATM network environment, there is a possibility that switches operate with the different network clocks at each end when the swithces don't operate with the same network clock. Exploiting the Japan Gigabit Network, the nationwid...
SUGIURA Kazunori, NAKAGAWA Shin'ichi, OGAWA Akimichi, NAKAMURA Osamu, MURAI Jun
Technical report of IEICE. CQ 99(622) 19-24 Feb 2000
This paper focuses on the real-time transmission of the video and audio through broadband Internet infrastructure. We developed Internet-aware collaborative video transmission mechanism using consumer DV. Smoothing the bursty traffic generated by ...
Technical report of IEICE. CQ 99(622) 13-17 Feb 2000
In the large-scale ATM network environment, there is a possibility that switches operate with the different network clocks at each end when the switches don't operate with the same network clock. Exploiting the Japan Gigabit Network, the nationwid...
We have researched and technological development concerning integrated into communications and broadcasting, partially of the next generation Internet technology development which used high speed networks. The technology which transmitted the digi...
Nakagawa S., Okazawa H., Kubota F., Komine T., Amemiya A.
IPSJ SIG Notes 99(83) 1-8 Oct 1999
Standing on the cooperative research with G8-GIBN Project about AUP in 1999, we examined the necessity of the proposals for the new internet layer model, as the social implication for the Next Generation Information Infrastructure, on the process ...
Technical report of IEICE. Forum on advanced communications ethics 98(221) 13-18 Jul 1998
The nationwide research and development network(R&D network testbed)is indispensable to advance the R&D on next-generation info-communication systems. In Euroe and USA, as important parts of the national R&D programs, network testbeds have been de...
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