Knowing that a person is near a door is sufficient information to have the door open automatically; knowing that a person is in a room is sufficient information to turn on the lights. The knowledge that comes from knowing a person’s location within the environment can be used as an input to a computational system. This presentation focuses on computational systems that make use of location awareness. This presentation considers several dimensions to analyze the use of the location variable within context-aware systems: local versus global reference, environmental versus device-specific responses, offering of either information or commands, and action taken by human versus system. The presentation concludes with the limitations of location-based information.


Reading List

Required Readings

Bederson, B. B. 1995. Audio augmented reality: a prototype automated tour guide. In Conference Companion on Human Factors in Computing Systems (Denver, Colorado, United States, May 07 - 11, 1995). I. Katz, R. Mack, and L. Marks, Eds. CHI '95. ACM, New York, NY, 210-211.

Abowd, G. D., Atkeson, C. G., Hong, J., Long, S., Kooper, R., and Pinkerton, M. 1997. Cyberguide: a mobile context-aware tour guide. Wirel. Netw. 3, 5 (Oct. 1997), 421-433.

Schilit, B., Adams, N., and Want, R. Context-Aware Computing Applications. Mobile Computing Systems and Applications, IEEE Workshop on, IEEE Computer Society (1994), 85-90.

Optional Readings


Salber, D., Dey, A., Abowd, G. 1999. The Context Toolkit: Aiding the Development of Context-Enabled Applications. CHI ’99. ACM, New York, NY, 434-441.

Abowd, G, Dey, A, Brown, P, Davies, N, Smith, M, and Steggles, P. 1999. Towards a Better Understanding of Context and Context-Awareness. Technical Report GIT-GVU-99-22, College of Computing, Georgia Institute of Technology.

Example Systems

Roy Want, Andy Hopper, Veronica Falcao, and Jonathon Gibbons. 1992. The Active Badge Location System. ACM Transactions on Information Systems lo(l): 91-102.

Elrod, S., Hall, G., Costanza, R., Dixon, M., and Des Rivières, J. 1993. Responsive office environments. Commun. ACM 36, 7 (Jul. 1993), 84-85.

McCarthy, J. F. and Anagnost, T. D. 1998. MusicFX: an arbiter of group preferences for computer supported collaborative workouts. In Proceedings of the 1998 ACM Conference on Computer Supported Cooperative Work CSCW '98. ACM, New York, NY, 363-372.


Bellotti, V. and Edwards, K. 2001. Intelligibility and accountability: human considerations in context-aware systems. Hum.-Comput. Interact. 16, 2 (Dec. 2001), 193-212.