In a heap model, solid blocks, or pieces, pile up according to the Tetris game mechanism. An optimal schedule is an in nite sequence of pieces minimizing the asymptotic growth rat...
This paper describes three design values that we apply for designing playful interactions. Interactive play objects can stimulate social interaction and physical play by providing ...
Designing and deploying a network protocol determines the rules by which end users interact with each other and with the network. We consider the problem of designing a protocol t...
We investigate services giving users an adequate insight on his or her energy consumption habits in order to optimize it in the long run. The explored energy awareness services are...
Social tagging systems provide users with the ability to share information and extend their field of knowledge. The purpose of this paper is to explore the tag relations of user in...