We consider Hidden Markov Models that emit sequences of observations that are drawn from continuous distributions. For example, such a model may emit a sequence of numbers, each of which is drawn from a uniform distribution, but the support of the uniform distribution depends on the state of the Hidden Markov Model. Such models generalise the more ...
We consider the parameterized verification problem for distributed algorithms where the goal is to develop techniques to prove the correctness of a given algorithm regardless of the number of participating processes. Motivated by an asynchronous binary consensus algorithm [James Aspnes, 2002], we consider round-based distributed algorithms communic...
Published in Artificial intelligence in medicine
Head and neck cancers are diagnosed at an annual rate of 3% to 7% with respect to the total number of cancers, and 50% to 75% of such new tumours occur in the upper aerodigestive tract. In this paper we propose formal methods based approach aimed to identify the head and neck tumour treatment stage by means of model checking. We exploit a set of ra...
Real-time systems sometimes need to be formally proven, especially realtime systems containing critical component, as planes, cars etc. Timed automata provide a convenient mathematical model for this. However, although they provide a representation of the temporal aspects of these systems, timed automata assume arbitrary precision and zero-delays a...
Published in La Radiologia medica
The Prostate Imaging Reporting and Data System (PI-RADS) version 2 emerged as standard in prostate magnetic resonance imaging examination. The Pi-RADS scores are assigned by radiologists and indicate the likelihood of a clinically significant cancer. The aim of this paper is to propose a methodology to automatically mark a magnetic resonance imagin...
Every engineer dreams of and strives for the day that more and more aspects of the daily life become smart, efficient, and automated. Smart grids, smart cities, mobility on demand and autonomous vehicles, even medical devices are a few domains with already significant progress towards a fully autonomous future. In such an increasingly autonomous wo...
Since dynamical systems has a major impact on human development, especially critical systems that can put human lives at risk if something goes wrong. Hence, the need of studying the behavior of these systems in order to guarantee their correct functioning. Nevertheless, computing such type of system has never been an easy task, as the complexity ...
Published in Automated Software Engineering
Rewriting logic and its implementation Maude are an expressive framework for the formal specification and verification of software and other kinds of systems. Concurrency is naturally represented by nondeterministic local transformations produced by the application of rewriting rules over algebraic terms in an equational theory. Some aspects of the...
Chemical Reaction Networks (CRN) constitute a formalism used to model biological processes. When the population number is not significant and the system is well-stirred, a Continuous-Time Markov Chain describes its stochastic dynamics. This class of model is characterised by the memoryless property: the future state of the system only depends on th...
We define a new method for taking advantage of net reductions in combination with a SMT-based model checker. Our approach consists in transforming a reachability problem about some Petri net, into the verification of an updated reachability property on a reduced version of this net. This method relies on a new state space abstraction based on syste...
