HAKOZAKI KATSUYA
| Emeritus Professor etc. | Emeritus Professor |
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Research Activity Information
MISC
- A Proposal of a Streaming Video System in Best-Effort Networks Using Adaptive QoS Control Rules
Mar. 2004, The 18th International Conference on Advanced Information Networking and Applications (AINA2004) - A Proposal of a Streaming Video System in Best-Effort Networks Using Adaptive QoS Control Rules
Mar. 2004, The 18th International Conference on Advanced Information Networking and Applications (AINA2004) - iCAMS: A Mobile Communication Tool Using Location and Schedule Information
Yasuto Nakanishi; Kazunari Takahashi; Takayuki Tsuji; Katsuya Hakozaki
The development of a new mobile communication tool, iCAMS, that uses location and schedule information to facilitate efficient communication is discussed. User studies of iCAMS indicate that user context, location information, and communication method protocols are useful but that some location and privacy issues should further be given importance. The users can use iCAMS not only to decide which communication channel to use but also to gather situation awareness information regarding other group members. The system also deletes the automatic routing and improves the interface for a manual action that callers initiate after receiving contextual feedback., Jan. 2004, IEEE Pervasive Computing, 3, 1, 82-88, English, Book review, 1536-1268, 2342639507 - iCAMS: A Mobile Communication Tool Using Location and Schedule Information
Yasuto Nakanishi; Kazunari Takahashi; Takayuki Tsuji; Katsuya Hakozaki
The development of a new mobile communication tool, iCAMS, that uses location and schedule information to facilitate efficient communication is discussed. User studies of iCAMS indicate that user context, location information, and communication method protocols are useful but that some location and privacy issues should further be given importance. The users can use iCAMS not only to decide which communication channel to use but also to gather situation awareness information regarding other group members. The system also deletes the automatic routing and improves the interface for a manual action that callers initiate after receiving contextual feedback., Jan. 2004, IEEE Pervasive Computing, 3, 1, 82-88, English, Book review, 1536-1268, 2342639507 - 映像品質の劣化に対するユーザ満足度と映像コンテンツの関係の分析
Nov. 2003, 電子情報通信学会 信学技法, NS2003, 148, 11-16 - A Proposal of a High Quality Video Delivery Method in Small-sacle Best Effort Networks
Sep. 2003, 6th Internatinal Workshop on Network-Based Information Systems (NBiS2003), 129-133 - システム環境に応じて動的に変化する制御ルールを利用したリアルタイム映像配信システムの提案
Sep. 2003, FIT （情報科学技術フォーラム）2003, 321-322 - A Proposal of a High Quality Video Delivery Method in Small-sacle Best Effort Networks
Sep. 2003, 6th Internatinal Workshop on Network-Based Information Systems (NBiS2003), 129-133 - ユーザの視聴形態を考慮した映像品質制御手法の提案
Jul. 2003, 電子情報通信学会、信学技報, CQ2003, 37, 25-28 - ネットワーク支援による高精度時刻同期の研究
Jun. 2003, マルチメディア、分散、協調とモバイル（DICOMO 2003）シンポジウム, 41-44 - インターネット放送サービスにおけるユーザの品質に対する嗜好を考慮したQoS制御手法
Jun. 2003, マルチメディア、分散、協調とモバイル（DICOMO 2003）シンポジウム, 321-324 - iCAMS2：位置情報を用いたモバイルコミュニケーション支援ツールのJ2MEによる構築と評価
Jun. 2003, マルチメディア、分散、協調とモバイル（DICOMO 2003）シンポジウム, 473-476 - iCAMS3：携帯電話とPC連動型モバイルコミュニケーション支援ツール
保多淳志
情報処理学会, Jun. 2003, マルチメディア、分散、協調とモバイル（DICOMO 2003）シンポジウム, 573-576, 10012086518 - 統計的評価基準と主観評価基準を融合したWebサイト評価技術の提案
Jun. 2003, マルチメディア、分散、協調とモバイル（DICOMO 2003）シンポジウム, 729-732 - 次世代インターネットにおけるQoS管理フレームワークの提案
Jan. 2003, 情報処理学会 分散システム／インターネット運用技術シンポジウム2003 (DSM 2003) - インターネット放送サービスにおけるユーザ指向QoS制御手法
Dec. 2002, 情報処理学会 分散システム／インターネット運用技術研究会, 28, 6, 31-36 - 高安定PCを用いたネットワーク計測
Oct. 2002, 電子情報通信学会 信学技法 - iCAMS: A Mobile Communication Tool Using Location and Schedule Information
Sep. 2002, International Conference on Pervasive Computing (Pervasive 2002) - JGNv6におけるパケット転送速度の問題とその解決
Jul. 2002, マルチメディア、分散、協調とモバイル（DICOMO 2002）シンポジウム, 305-308 - 固定電話とPCとの電話帳共有システム
Jul. 2002, マルチメディア、分散、協調とモバイル（DICOMO 2002）シンポジウム, 265-268 - アプリケーションレベルでのファイルオーバを実現する分散アプリケーションにおけるクラスタシステムの提案
Jul. 2002, マルチメディア、分散、協調とモバイル（DICOMO 2002）シンポジウム, 289-292 - 高精度な位置情報の共有によるモバイルコミュニケーション支援システム、マルチメディア
Jul. 2002, マルチメディア、分散、協調とモバイル（DICOMO 2002）シンポジウム, 225-228 - iCAMS：位置情報とスケジュール情報を用いたモバイルコミュニケーションツールの運用実験及び評価
Jul. 2002, マルチメディア、分散、協調とモバイル（DICOMO 2002）シンポジウム, 213-216 - メタデータを用いたマルチメディアデータ推薦検索システム
Jul. 2002, マルチメディア、分散、協調とモバイル（DICOMO 2002）シンポジウム, 133-136 - An Improved Recommendation Method for Better Filtering Information out of Database
Jun. 2002, IPSJ Transactions on Databases, Vol. 43,/No. SIG 5 (TOD 14),66 – 74 - An Improved Recommendation Method for Better Filtering Information out of Database
Jun. 2002, IPSJ Transactions on Databases, Vol. 43,/No. SIG 5 (TOD 14),66 – 74 - Icams: A mobile communication tool using location and schedule information
Yasuto Nakanishi; Kazunari Takahashi; Takayuki Tsuji; Katsuya Hakozaki
We have developed a communication support system that estimates the situation of a person using schedule information and location information provided by a PHS (Personal Handy Phone System). From the lessons provided by our prior studies and inventions, we developed a new mobile communication tool for cellular phones that uses location information and schedule information. This is a kind of dynamic telephone book, which we have named iCAMS. We performed user studies for eight weeks in Tokyo with a group of students and with a group of small-office workers. By analyzing the communication logs, questionnaires and interviews we conducted with the users, we evaluated our system., Springer Verlag, 2002, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2414, 239-252, English, 1611-3349, 84958970422 - An Improved Recommender System Based on Extended Filtering
Dec. 2001, IEEE International Conference on Systems, Man, and Cybernetics 2001 (IEEE SMC 2001), to appear - An Improved Recommender System Based on Extended Filtering
Dec. 2001, IEEE International Conference on Systems, Man, and Cybernetics 2001 (IEEE SMC 2001), to appear - A Proposal of a QoS Control for Digital Video Libraries
Sep. 2001, Maurizio Tucci( Ed.) Multimedia Databases and Image Communication, Springer, 202-212 - A Proposal of a QoS Control for Digital Video Libraries
Sep. 2001, Maurizio Tucci( Ed.) Multimedia Databases and Image Communication, Springer, 202-212 - Context Aware Messaging Servece: Development and Evaluation of a Communication System Using Location Information and Schedule Information
NAKANISHI Yasuto; TSUJI Takayuki; OHYAMA Minoru; HAKOZAKI Katsuya
This paper describes a context-based dynamic messaging system, called "Context Aware Messaging Service". It uses schedule information and location information of the message addressee. According to the addressee's communication context (schedule, location, and available media), the system selects the most suitable telephone umber or e-mail address, and redirects each incoming message dynamically. It also writes the schedule and location information of users into an HTML file which users can share on the WWW. We had an experiment for two months in Tokyo and the users are a group of SOHO workers. We evaluated the system with their opinions and with the analysis of communication logs. Both dynamic message redirect and sharing communication contexts produced smooth communication. The users preferred sharing communication contexts and it improved feeling of a team., Information Processing Society of Japan (IPSJ), Jul. 2001, Transactions of Information Processing Society of Japan, 42, 7, 1847-1857, Japanese, 1882-7764, 110002725908, AN00116647 - アプリケーションQoS管理ポリシー設定手法の提案と実装
Jun. 2001, マルチメディア、分散、協調とモバイル（DICOMO 2001）シンポジウム, 519-524 - 携帯電話での使用を想定した音声認識メールシステム
Jun. 2001, マルチメディア、分散、協調とモバイル（DICOMO 2001）シンポジウム, 399-404 - Application QoS Management for Distributed Computing Systems
Jun. 2001, Proceedings of the IEEE International Conference on Communications - iCAMS:位置情報とスケジュール情報を用いたモバイルコミュニケーションツールの構築
Jun. 2001, マルチメディア、分散、情報処理学会DICOMO2001シンポジウム論文集, 513-518 - Combining Dynamic Agents and Collaborative Filtering without Sparsity Rating Problem for Better Recommendation Quality
Jun. 2001, Joint DELOS-NSF Workshop on Personalisation and Recommender Systems in Digital Libraries 2001, to appear, 25-30 - Application QoS Management for Distributed Computing Systems
Jun. 2001, Proceedings of the IEEE International Conference on Communications - Combining Dynamic Agents and Collaborative Filtering without Sparsity Rating Problem for Better Recommendation Quality
Jun. 2001, Joint DELOS-NSF Workshop on Personalisation and Recommender Systems in Digital Libraries 2001, to appear, 25-30 - 分散システムにおけるアプリケーションQoS管理手法
Feb. 2001, 情報処理学会分散システム／インターネット運用技術シンポジウム, 2001, 4, 75-80 - 位置情報を用いた状況推定によるコミュニケーション支援システムの開発〜ＳＯＨＯグループによる利用実験の報告
Feb. 2001, 電子情報通信学会第３回ネットワーク社会とライフスタイル時限研究会,NTSL3-3 - 学術講演会
Nov. 2000, 「情報社会のセキュリティ」予稿集，電気通信大学 - Development and Evaluation of Context Aware Messaging Service Using Location Information and Schedule Information
Oct. 2000, Proceedings of the 7th International Workshop on Mobile Multimedia Communications,, 3B-5-1 -3B-5-7 - Development and Evaluation of Context Aware Messaging Service Using Location Information and Schedule Information
Oct. 2000, Proceedings of the 7th International Workshop on Mobile Multimedia Communications,, 3B-5-1 -3B-5-7 - A distributed notebook system for vocabulary learning
SAGISAKA Tomoko
Jul. 2000, Proc. of ED-MEDIA, 2000, 959-964, 10012492753 - 調査研究運営委員会編「第60回全国大会記念セッション報告集〜過去と未来をみつめる〜」
Jul. 2000, 情報処理学会 - A Distributed Notebook System for Vocabulary Learning
Jul. 2000, Proc. of ED-MEDIA 2000, 959-964 - A Browsing System for a Database Using Visualization of User Preferences
Jul. 2000, Proceedings on Information Visualization 2000,IEEE CS, 277-282 - 音声認識によるWebサーフィン統合インタフェース
Jun. 2000, マルチメディア、分散、情報処理学会DICOMO2000シンポジウム論文集, 733-738 - Context Aware Messaging Service：シチュエーションに応じた動的メッセージ伝達システムの設計と実装
辻貴孝
Jun. 2000, 分散,マルチメディア,情報処理学会DICOMO2000シンポジウム論文集,, 121-126, 20000140511 - Connective Office: Context Aware Messaging Serviceの運用実験および評価
Jun. 2000, 情報処理学会DICOMO2000シンポジウム論文集, 607-612 - 電気通信大学ネットワークの現状と課題
May 2000, 情報処理学会 分散システム/インターネット運用技術研究会， DSM17-6, 31-36 - 分散システムにおけるアプリケーションQoS管理手法
May 2000, 情報処理学会研究報告 分散システム／インターネット運用技術 17‐1, 1-6 - 位置情報を用いた状況推定によるコミュニケーション支援方式の提案
May 2000, 情報処理学会モバイルコンピューティングとワイヤレス通信研究会, MBL13-5 - 利用者特性とドキュメント特性を利用したブラウジング環境
May 2000, 情報処理学会論文誌：データベース, 41, SIG 3(TOD6), 46-57 - 位置情報を用いた状況推定によるコミュニケーションの支援
Mar. 2000, 情報処理学会第60回全国大会3Z-6 - A browsing system for a database using visualization of user preferences
H Kanai; K Hakozaki
This paper describes a browsing system for a database using visualization of user preferences. The system has the following features: (1) The use of 3D thumbnail objects to represent their contents and properties (2) The use of some property views and multidimensional scaling (MDS) to lay out the objects in information space, and (3) The use of update mechanism to perform the adaptive visualization, to changes in user preferences. In this environment, the user becomes aware that there are information, sets which the user seems to be interested in, from objects in information space, and stroll there., IEEE COMPUTER SOC, 2000, 2000 IEEE INTERNATIONAL CONFERENCE ON INFORMATION VISUALISATION, PROCEEDINGS, 277-282, English, 1093-9547, WOS:000089401000041 - Context aware messaging service: A dynamical messaging delivery using location information and schedule information
Yasuto Nakanishi; Takayuki Tsuji; Minora Ohyama; Katsuya Hakozaki
This paper describes a context-based dynamic messaging system. It uses schedule information and location information of the message addressee. According to the addressee's communication context (schedule, location, and available media), the system selects the most suitable telephone number or e-mail address, and redirects each incoming message dynamically. It also writes the schedule and location information of users into an HTML file which users can share on the WWW. It will work as mobile groupware for mobile workers. Evaluating the system during a two-month experiment in Tokyo, we found that our system produced smooth communication and a greater feeling of teamwork. © Springer-Verlag London Ltd., 2000, Personal and Ubiquitous Computing, 4, 4, 221-224, English, 1617-4909, 0005692306 - Context aware messaging service: A dynamical messaging delivery using location information and schedule information
Yasuto Nakanishi; Takayuki Tsuji; Minora Ohyama; Katsuya Hakozaki
This paper describes a context-based dynamic messaging system. It uses schedule information and location information of the message addressee. According to the addressee's communication context (schedule, location, and available media), the system selects the most suitable telephone number or e-mail address, and redirects each incoming message dynamically. It also writes the schedule and location information of users into an HTML file which users can share on the WWW. It will work as mobile groupware for mobile workers. Evaluating the system during a two-month experiment in Tokyo, we found that our system produced smooth communication and a greater feeling of teamwork. © Springer-Verlag London Ltd., 2000, Personal and Ubiquitous Computing, 4, 4, 221-224, English, 1617-4909, 0005692306 - Connective Houseの構想とその基盤技術の開発
Dec. 1999, インタラクティブシステムとソフトウェアⅦ，近代科学社, 188 - Application QoS Management in LAN/MAN
Nov. 1999, Proceedings of IEEE Workshop on Loal and Metoropolitan Area Networks, 6-9 - Application QoS Management in LAN/MAN
Nov. 1999, Proceedings of IEEE Workshop on Loal and Metoropolitan Area Networks, 6-9 - 音声によるWebサーフィン総合インターフェース
Sep. 1999, 情報処理学会第59回全国大会2-133, 133-134 - シチュエーションに応じた動的メッセージ伝達システムの構築
Sep. 1999, 第15回分散システム／インターネット運用技術研究会情報処理学会研究報告, DSM15-5, 19-24 - Jave分散オブジェクトを利用したアプリケーション・インストーラの開発
Sep. 1999, 第15回分散システム／インターネット運用技術研究会情報処理学会研究報告, DSM15-5, 25-30 - Browsing Based on Features of Readers and Documents n Web-Based Virtual Library :Yawara
Aug. 1999, ACM Digital Libraries 99, Proceedings of Workshop on Organizing Web Space（WOWS）, 44-53 - Browsing Based on Features of Readers and Documents n Web-Based Virtual Library :Yawara
Aug. 1999, ACM Digital Libraries 99, Proceedings of Workshop on Organizing Web Space（WOWS）, 44-53 - 分散システムにおけるアプリケーション管理フレームワークの提案
Feb. 1999, 分散システム／インターネット運用技術シンポジウム, 99, 3, 81-86 - Conceptual Design of a Virtual Library for Personal Use
Katsuya Hakozaki; Hideaki Kanai; Katsunori Ishikawa; Hong Chen; Katsushi Izawa
This paper proposes a concept of the Yawara personalized virtual library and its prototype design. The main purpose of the library is to provide a user with a personalized information set accessible through a user-friendly interface. In order to attain machine and operating system independence, the library is constructed by VRML and its WWW browsers and, as information sources, HTML data widely distributed on the Internet. The virtual librarian agent helps to find and acquire the data sets based on user behavior. The virtual librarian keeps the user's personal characteristics, obtained from his/her reading history, and book characteristics. As the user working space, personal bookshelves are provided to work with the stored books. The system will be a powerful tool for intelligent work fully utilizing the Internet. © 1999 Scripta Technica., John Wiley and Sons Inc., 1999, Systems and Computers in Japan, 30, 3, 43-51, English, 0882-1666, 0033100136 - Conceptual Design of a Virtual Library for Personal Use
Katsuya Hakozaki; Hideaki Kanai; Katsunori Ishikawa; Hong Chen; Katsushi Izawa
This paper proposes a concept of the Yawara personalized virtual library and its prototype design. The main purpose of the library is to provide a user with a personalized information set accessible through a user-friendly interface. In order to attain machine and operating system independence, the library is constructed by VRML and its WWW browsers and, as information sources, HTML data widely distributed on the Internet. The virtual librarian agent helps to find and acquire the data sets based on user behavior. The virtual librarian keeps the user's personal characteristics, obtained from his/her reading history, and book characteristics. As the user working space, personal bookshelves are provided to work with the stored books. The system will be a powerful tool for intelligent work fully utilizing the Internet. © 1999 Scripta Technica., John Wiley and Sons Inc., 1999, Systems and Computers in Japan, 30, 3, 43-51, English, 0882-1666, 0033100136 - Webを用いたネットワーク構成視覚化システムの構築
Nov. 1998, 情報処理学会研究報告分散システム運用技術,98-DSM-12, 1-6 - 個人利用に適合した仮想図書館の構想
May 1998, 電子情報通信学会論文誌, J81-D-Ⅱ, 5, 1025-1034 - 総論：安定したネットワークの構築，運用を目指して
1998, 情報処理, 39, 10, 959-963