Location-based services in general require information about the position of certain objects. For instance, for a navigation service the position of the user needs to be known. Th...
Hendrik Lemelson, Thomas King, Wolfgang Effelsberg
In this paper we explore the utility of the Navigation Map (NM), a graphical representation of the discourse structure. We run a user study to investigate if users perceive the NM...
Many systems provide the user with a limited viewport of a larger graphical workspace. In these systems, the user often needs to find and select targets that are in the workspace,...
Computer systems are complex and unforgiving. Users need environments more tolerant of errors, allowing them to correct mistakes and explore alternatives. This is the aim of Joyce...
Abstract. In this paper we discuss about composing services from standard suites of applications for personal data management in mobile devices. We propose a data model and an inte...
Augusto Celentano, Stefano Faralli, Fabio Pittarel...