This paper describes the logic ALCHR+ , which extends ALCR+ with a primitive role hierarchy, and presents an appropriate extension to the ALCR+ satisfiability testing algorithm. ALCHR+ is of interest because it provides useful additional expressive power and, although its satisfiability problem is Exptimecomplete, the algorithm is relatively simple and is amenable to optimisation.

Online worlds have become a fundamental element of the virtual landscape. The development of MMORPGs has helped give credence to the idea that online spaces can support valid social communities. Having proved that these communities exist, scholars must now decide whether these communities are different to those in the 'real' world. What makes gaming communities stand out? This paper looks at ho...

We propose a way to automatically improve the annotation of verbal complex predicates in PropBank which until now has been treating language mostly in a compositional manner. In order to minimize the manual re-annotation effort, we build on the recently introduced concept of aliasing complex predicates to existing PropBank rolesets which encompass the same meaning and argument structure. We sug...

In the Game Studies field, the study of MMORPG’s have been approached by four mayor research traditions: social aspects tradition, individual player issues, narratological themes and ludological themes. Although these are not mutually exclusive, focusing in one or two aspects of MMORPG’s usually means omitting elements of other themes. One fundamental theme that has been usually ommited is that...

Role-Based Access Control (RBAC) is increasingly used for ensuring security and privacy in complex organizations such as healthcare institutions. In RBAC, access permissions are granted to an individual based on her defined roles. Much work has been done on the specification of RBAC models for enforcing access control; however, in order to arrive at appropriate choices of access control for par...

Semantic annotation has so far been approached in essentially the same way as annotation at other levels of linguistic information, namely as the business of labeling text with certain tags which add certain information to the text, in this case, semantic information. Semantic role labeling is a case in point. This may be very useful, for instance for determining the variety of ways in which ce...