| Presentation | 2003/9/2 A User Activity Assistance System that uses Space-time Description from Ubiquitous Sensor information Yoshinori ISODA, Shoji KURAKAKE, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It is important for an enhanced user activity assistance system to consider space-time constraint as the context of users. In this paper, we have proposed a user activity assistance system that uses a situation state sequence description scheme. In the scheme each state is described as the space-time relationship between users and objects in the real world. Typical state sequences are stored as the models of user activities. We have developed a ubiquitous experimental test-bed house in which various sensors are embedded and RFID tags are attached to objects there. Each state is detected by the analysis of the output of the sensors and the RFID tags. The context of a user is obtained by the fitting of the state sequence model based on a decision tree generated by a C4.5 algorithm. We have evaluated the performance of the proposed system in the test-bed house and concluded that our system can effectively obtain the space-time context of a user. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Ubiquitous / C4.5 / Space-time description |
| Paper # | PRMU2003-113 |
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| Conference Information | |
| Committee | PRMU |
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| Conference Date | 2003/9/2(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Pattern Recognition and Media Understanding (PRMU) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A User Activity Assistance System that uses Space-time Description from Ubiquitous Sensor information |
| Sub Title (in English) | |
| Keyword(1) | Ubiquitous |
| Keyword(2) | C4.5 |
| Keyword(3) | Space-time description |
| 1st Author's Name | Yoshinori ISODA |
| 1st Author's Affiliation | Multimedia Laboratories, NTT DoCoMo, Inc.() |
| 2nd Author's Name | Shoji KURAKAKE |
| 2nd Author's Affiliation | Multimedia Laboratories, NTT DoCoMo, Inc. |
| Date | 2003/9/2 |
| Paper # | PRMU2003-113 |
| Volume (vol) | vol.103 |
| Number (no) | 296 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |