Robots are becoming ubiquitous: from vacuum cleaners to driverless cars, there is a wide
variety of applications, many with potential safety hazards. The work presented in this paper …

The growing complexity and diversity of models used for engineering dependable systems
implies that a variety of formal methods, across differing abstractions, paradigms, and …

Abstract Design-by-contract is an important technique for model-based design in which a
composite system is specified by a collection of contracts that specify the behavioural …

State-machine based notations are ubiquitous in the description of component systems,
particularly in the robotic domain. To ensure these systems are safe and predictable, formal …

We describe our UTP theory of hybrid relations, which extends the relational calculus with
continuous variables and differential equations. This enables the use of UTP in modelling …

The current practice of programming mobile and autonomous robots does not reflect the
modern outlook of their applications. Such practice is often based on standard state …

Control engineers make extensive use of diagrammatic notations; control law diagrams are
used in industry every day. Techniques and tools for analysis of these diagrams or their …

Abstract Safety-Critical Java (SCJ) is a novel version of Java that addresses issues related
to real-time programming and certification of safety-critical applications. In this paper, we …

Designing robotic systems can be very challenging, yet controllers are often specified using
informal notations with development driven primarily by simulations and physical …

This position paper proposes a refinement technique for the development of Safety-Critical
Java (SCJ) programs. It is based on the Circus family of languages, which comprises …