W-mail: an electronic mail system for wearable computing environments
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Communication through virtual active objects overlaid onto the real world
Proceedings of the third international conference on Collaborative virtual environments
A location-aware graphical BBS for mobile environments
Proceedings of the 8th ACM international symposium on Advances in geographic information systems
Digital tags: data with restricted accessibility for e-commerce applications
ITVE '01 Proceedings of the workshop on Information technology for virtual enterprises
Public Applications of SpaceTag and Their Impacts
Digital Cities, Technologies, Experiences, and Future Perspectives [the book is based on an international symposium held in Kyoto, Japan, in September 1999
Source Description-Based Approach for the Modeling of Spatial Information Integration
ER '01 Proceedings of the 20th International Conference on Conceptual Modeling: Conceptual Modeling
A Spatial Hypermedia Framework for Position-Aware Information Delivery Systems
DEXA '01 Proceedings of the 12th International Conference on Database and Expert Systems Applications
Personal location based services on place-enhanced blog
MM '08 Proceedings of the 16th ACM international conference on Multimedia
Location-Aware Reminders with Personal Life Content on Place-Enhanced Blogs
W2GIS '08 Proceedings of the 8th International Symposium on Web and Wireless Geographical Information Systems
Insightful slideshow: automatic composition of personal photograph slideshow using the web
Intelligent Decision Technologies - Special issue on design of intelligent environment
KOTOHIRAGU NAVIGATOR: an open experiment of location-aware service for popular mobile phones
LoCA'06 Proceedings of the Second international conference on Location- and Context-Awareness
Experiments of entertainment applications of a virtual world system for mobile phones
ICEC'05 Proceedings of the 4th international conference on Entertainment Computing
UCS'04 Proceedings of the Second international conference on Ubiquitous Computing Systems
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SpaceTag is an object system on which each object called SpaceTag can be accessed only from limited locations and limited time period. Its applications include entertainment systems, advertisement services, bulletin board systems, and personal communication systems. For one-way communication, they are broadcasted from the server; for two-way communication, users can cut and paste SpaceTags between their portable PCs and the real space. The SpaceTag system is a location-aware information system, as well as it is like an augmented reality system because it attaches information to the real space. However, we categorize it as an overlaid virtual system, because it has no direct link to real objects. It can be realized as a public service without causing drastic change of this society, and without much cost.