Formal Techniques, Modelling and Analysis of Timed and Fault-Tolerant Systems : Joint International Conferences on Formal Modeling and Analysis of Timed Systems, FORMATS 2004 and Formal Techniques in Real Time and Fault-Tolerant Systems, FTRTFT 2004, Grenoble, France, September 22-24, 2004, Proceedings - Yassine Lakhnech, Sergio Yovine ((Lecture Notes in Computer Science))