Heckerman (1993) defined causal independence in terms of a set of temporal conditional independence statements. These statements formalized certain types of causal interaction whe...
Abstract. This paper describes how high level implementations of (needed) narrowing into Prolog can be improved by analysing definitional trees. First, we introduce a refined repre...
Spatial structure supporting applications offer an abstract level of what can be found in the real world. However, in many systems, objects are aligned straight, rotation is not p...
In this paper I examine what industry really needs from formal specification techniques. I first describe the background to our use of formal techniques. I then look at the role o...
What are people currently looking at in their web browser? Do the patterns of pages change over time? Are changes periodic or just related to current events or other factors? We a...