Entry Points into a Smart Campus Environment - Overview of the ETHOC System 

Michael Rohs and Juergen Bohn 


Abstract 

The university campus is an interesting application environment for the 
ubiquitous computing paradigm: a large number of users share a substantial 
amount of their information needs and much of this information is directly 
related to physical objects, places, and people that are situated in the 
campus environment. We motivate the need for material entry points into a 
virtual campus that increase its accessibility and visibility from within the 
physical campus environment. 

We focus on the aspect of linking virtual and physical elements in such a 
setting and present the ETHOC system, which enables users to attach virtual 
counterparts to printed material. The system performs the creation, 
administration, and intermediation of online resources related to paper 
documents. To information providers, it offers a Web-based author portal for 
generating unique IDs that can be printed as barcodes and for associating 
online content and actions to printed material. To users it offers simple 
means to interact with virtual counterparts of printed documents using a 
variety of devices, such as WAP-enabled mobile phones or PDAs, and it stores a 
personal access history for each user. 

The ETHOC system allows us to put ubiquitous computing concepts into 
practical use and to gain new insights into the design of virtual counterparts 
of real-world objects.