Ordinary logical implication is not enough for answering queries in a logic database, since especially negative information is only implicitly represented in the database state. M...
Peer production has played an important role in the economics of Web 2.0 related services. User participation and contribution become the main driving dynamics of this new economi...
Software's increasing role creates both requirements for being able to trust it more than before, and for more people to know how much they can trust their software. A sound ...
Abstract. This paper describes a few ideas concerned with geographical information systems (GIS) development. Those ideas come from a GIS development project named GeKon, which is ...
Abstract. We present a formalism for modeling replication in a distributed system with concurrent users sharing information. It is based on actions, which represent operations requ...
Marc Shapiro, Karthikeyan Bhargavan, Nishith Krish...