ORM (Object-Role Modeling) is a rich and well-known conceptual modeling method. As ORM has a formal semantics, reasoning tasks such as satisfiability checking of an ORM schema natu...
Using the language Z for more than specification is hindered by the fact that its algebra of schemas is not monotonic with respect to refinement; so specification is modular, but ...
We present work that explores whether the asynchronous peer-topeer communication capabilities of email can be made accessible to illiterate populations in the developing world. Bu...
We present a translation from a logic of access control with a "says" operator to the classical modal logic S4. We prove that the translation is sound and complete. We al...
In 1998 a survey was published on the extent to which software engineering papers validate the claims made in those papers. The survey looked at publications in 1985, 1990 and 1995...