Controllers for dynamical systems that operate in safety-critical settings must account stochastic disturbances. Such disturbances are often modeled as process noise a system, and common assumptions the underlying distributions known and/or Gaussian. In practice, however, these may be unrealistic can lead to poor approximations of true distribution. We present novel controller synthesis method ...

This paper reports on an experimental application of formal specification to inform analysis of compiled code. The analyses with which we are concerned attempt to recover abstraction and order from the potentially chaotic world of machine code. To illustrate the kind of abstractions of interest, we give a formal model of a simple microprocessor. This is based on a traditional state-based Z spec...

The increase in design complexity emphasises the relevance of formal verification techniques for both software and hardware. Formal methods with their mathematical-based modelling can provide proofs of various properties for the designs, thus ensuring a certain degree of complexity control and enhancing the system confidence. There are numerous formal modelling and verification techniques emplo...

This paper introduces a new notation called S which is based on higher order logic. It has been developed specifically to support the practical application of formal methods in industrial scale projects. The development of S has occurred in the context of an investigation into the possibility of using formal specification techniques in the development of a $400 million air traffic control syste...