| 2007 | ATC | A Wearable System for Outdoor Running Workout State Recognition and Course Provision. | Katsuhiro Takata, Masataka Tanaka, Jianhua Ma, Runhe Huang, Bernady O. Apduhan, Norio Shiratori |
| 2006 | AINA | A Dangerous Location Aware System for Assisting Kids Safety Care. | Katsuhiro Takata, Jianhua Ma, Bernady O. Apduhan |
| 2005 | AINA | Designing a Space-Oriented System for Ubiquitous Outdoor Kid's Safety Care. | Katsuhiro Takata, Yusuke Shina, Jianhua Ma, Bernady O. Apduhan |
| 2005 | EUC | Designing a Context-Aware System to Detect Dangerous Situations in School Routes for Kids Outdoor Safety Care. | Katsuhiro Takata, Yusuke Shina, Hiraku Komuro, Masataka Tanaka, Masanobu Ide, Jianhua Ma |
| 2005 | ICPADS | A Context Based Architecture for Ubiquitous Kid's Safety Care Using Space-oriented Model. | Katsuhiro Takata, Jianhua Ma, Bernady O. Apduhan |
| 2004 | AINA | GRAM - A P2P System of Group Revision Assistance Management. | Katsuhiro Takata, Jianhua Ma |
| 2004 | EUC | A P2P Ubiquitous System for Testing Network Programs. | Makoto Shizuka, Jianhua Ma, Jeneung Lee, Yoichiro Miyoshi, Katsuhiro Takata |