We use the-calculus to model the evolution of biochemical systems, taking advantage of their similarities with global computation applications. First, we present a reduction semantics for the-calculus from which causality and concurrency can be mechanically derived. We prove that our semantics agrees with the causal deÿnitions presented in the literature.… (More)
We report on the specification and analysis of VICE, a hypothetical cell with a genome as basic as possible. We used an enhanced version of the π-calculus and a prototype running it to study the behaviour of VICE. The results of our experimentation in silico confirm that our virtual cell " survives " in an optimal environment and shows a behaviour similar… (More)
We use an enhanced operational semantics to infer quantitative measures on systems describing cryptographic protocols. System transitions carry enhanced labels. We assign rates to transitions by only looking at these labels. The rates reflect the distributed architecture running applications and the use of possibly different crypto-systems. We then map… (More)
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We use a special operational semantics which helps us in predicting quantitative measures on systems describing cryptographic protocols: We also consider a possible attacker. The transitions of the system carry enhanced labels. We assign rates to transitions by only looking at these labels. We then map transition systems to Markov chains and evaluate… (More)
We use a special operational semantics which drives us in inferring quantitative measures on system describing cryptographic protocols. The transitions of the system carry enhanced labels. We assign rates to transitions by only looking at these labels. The rates reflect the distributed architecture running applications and the use of possibly different… (More)
Process calculi are widely used to study global computing, in which a great number of computing agents cooperate to achieve common goals, possibly exchanging information through communications or interactions. In this thesis we use the approach based on Enhanced Operational Semantics that defines transition systems with a rich labelling. We exploit this… (More)
The similarities between systems of living entities and systems of concurrent processes may support biological experiments in silico. Process calculi offer a formal framework to describe biological systems, as well as to analyse their behaviour, both from a qualitative and a quantitative point of view. A couple of little examples help us in showing how this… (More)