Abstract. We study the decidability and complexity of verification problems for timed automata over time intervals of fixed, bounded length. One of our main results is that time-bo...
Abstract. A distributed system is fault-tolerant if it continues to perform correctly even when a subset of the processes becomes faulty. Faulttolerance is highly desirable but oft...
Abstract. We are interested in the development of a database management layer which is completely portable and, therefore, "pluggable" on top of multiple host platforms. ...
nizing multiple forms of information and knowledge processing on different levels of abstraction in a structured and principled manner. We propose knowledge processing middleware a...
Modelling security policies requires means to specify permissions and prohibitions. However, this is generally not sufficient to express security properties such as availability ...