We propose a probabilistic transition system specification format, referred to as probabilistic RBB safe, for which rooted branching bisimulation is a congruence. The congruence theorem is based on the approach of Fokkink for the qualitative case. For this to work, the theory of transition system specifications in the setting of labeled transition systems needs to be extended to deal with proba...

Pastry is an algorithm for implementing a scalable distributed hash table over an underlying P2P network, an active area of research in distributed systems. Several implementations of Pastry are available and have been applied in practice, but no attempt has so far been made to formally describe the algorithm or to verify its properties. Since Pastry combines rather complex data structures, asy...

We present a new real-time temporal logic for the specification and verification of discrete quantitative temporal properties. This logic is an extension of the well-known logic CTL. Its semantics is defined on discrete time transition systems which are in turn interpreted in an abstract manner instead of the usual stuttering interpretation. Hence, our approach directly supports abstractions of...

The increasing complexity of concurrent systems requires the development of rigorous design methods. This need has motivated research on specification formalisms and the associated verification methods and tools. By verification, we mean the comparison of a system against its specifications. We consider that a system is described by a program. Specifications describe the service provided by the...

To cope with the difficulty of 3D MRI brain scans segmentation, specification and instantiation of a priori models should be constrained by local images characteristics. We introduce situated cooperative agents for the extraction of domain and control knowledge from image grey levels. Their dedicated behaviours, i.e segmentation of one type of tissue, are dynamically adapted function of their p...

We have previously developed an architecture and a set of tools called the Digital electronic Guideline Library (DeGeL), which includes a webbased tool for structuring (marking-up) free-text clinical guidelines (GLs), namely, the URUZ Mark-up tool. In this study, we developed and evaluated a methodology and a tool for a mark-up-based specification and assessment of the quality of that specifica...

Stability studies play a critical role in assuring product quality at all points in the vaccine life cycle. These studies used to determine vaccine expiry date and vaccine efficacy. Accelerated stability and long term stability study performed for three batches of trivalent oral poliomyelitis vaccine (OPV) and three batches of monovalent OPV (type1) manufactured by Razi institute. After samplin...

In the implementation of activities we often find what is called a project. The project an activity that must be completed in accordance with specified target and time, so can regarded as success implementation. One projects ques-tion construction Construction their encounter various kinds problems arise from elements involved them, this hamper being implemented. problem arises contractor facto...