144,615 research outputs found
Big Data Analytics for QoS Prediction Through Probabilistic Model Checking
As competitiveness increases, being able to guaranting QoS of delivered
services is key for business success. It is thus of paramount importance the
ability to continuously monitor the workflow providing a service and to timely
recognize breaches in the agreed QoS level. The ideal condition would be the
possibility to anticipate, thus predict, a breach and operate to avoid it, or
at least to mitigate its effects. In this paper we propose a model checking
based approach to predict QoS of a formally described process. The continous
model checking is enabled by the usage of a parametrized model of the monitored
system, where the actual value of parameters is continuously evaluated and
updated by means of big data tools. The paper also describes a prototype
implementation of the approach and shows its usage in a case study.Comment: EDCC-2014, BIG4CIP-2014, Big Data Analytics, QoS Prediction, Model
Checking, SLA compliance monitorin
Model checking quantum Markov chains
Although the security of quantum cryptography is provable based on the
principles of quantum mechanics, it can be compromised by the flaws in the
design of quantum protocols and the noise in their physical implementations.
So, it is indispensable to develop techniques of verifying and debugging
quantum cryptographic systems. Model-checking has proved to be effective in the
verification of classical cryptographic protocols, but an essential difficulty
arises when it is applied to quantum systems: the state space of a quantum
system is always a continuum even when its dimension is finite. To overcome
this difficulty, we introduce a novel notion of quantum Markov chain, specially
suited to model quantum cryptographic protocols, in which quantum effects are
entirely encoded into super-operators labelling transitions, leaving the
location information (nodes) being classical. Then we define a quantum
extension of probabilistic computation tree logic (PCTL) and develop a
model-checking algorithm for quantum Markov chains.Comment: Journal versio
On Formal Methods for Collective Adaptive System Engineering. {Scalable Approximated, Spatial} Analysis Techniques. Extended Abstract
In this extended abstract a view on the role of Formal Methods in System
Engineering is briefly presented. Then two examples of useful analysis
techniques based on solid mathematical theories are discussed as well as the
software tools which have been built for supporting such techniques. The first
technique is Scalable Approximated Population DTMC Model-checking. The second
one is Spatial Model-checking for Closure Spaces. Both techniques have been
developed in the context of the EU funded project QUANTICOL.Comment: In Proceedings FORECAST 2016, arXiv:1607.0200
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