In this paper, the authors explore the usefulness of a combination of semi-formal and formal methods in specifying reactive systems and verifying their properties. The authors propose an approach combining STATEMATE and the temporal logic FNLOG. STATEMATE is a semi-formal method, which has been used for the development of large industrial applications. It pertains to the specification and design of complex reactive systems and builds simulations and prototypes rapidly. Though STATEMATE provides rigorous specifications, these are not verifiable to ensure and guarantee the reliability of the system being developed. To fulfil the verification objective, a STATEMATE specification is translated into a logic-based specification language FNLOG, which allows its verification. This paper describes the cross reference between STATEMATE and FNLOG features. Systematic derivation schemes from STATEMATE models to FNLOG specifications and different steps of the proposed translation procedure. . (2009) 'Translating STATEMATE models into FNLOG for the verification of safety requirements in reactive systems', Int.

Today, users need to interact with the UIs of the computer systems at any time and in any place. In fact, users have to deal with diverse devices supporting diverse interfaces and used in diverse environments. Thus, research must to be devoted to adapting the content, presentation and also the navigation scheme of the user interface not only for people without disabilities but also to impaired users according to updated context of use. In fact, context is captured from the surrounding environment in which the user is interacting with the application, gathered from a variety of sources and changed dynamically over time. For that reason, we propose to include context awareness system as a solution for adaptation of user interface tailored to user with special needs. In this paper, we try to introduce our contribution in how to build a user interface which is aware and capable to adapt depending of context. Our contribution is demonstrated through the behaviour of task model.