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##### DIONYSOS - 2019

Overall Objectives
Application Domains
New Software and Platforms
Partnerships and Cooperations
Bibliography

## Section: Partnerships and Cooperations

### International Initiatives

#### Inria International Partners

##### Informal International Partners

We keep a long collaboration in research with the CalPoly at Pomona, USA, on the transient analysis of Markovian models.

#### Participation in Other International Programs

##### Ecos Sud program

Project “Masc”

• Title: Mathematical Algorithms for Semantic Cognition

• International Partner (Institution - Laboratory - Researcher):

• Universidad de la República (Uruguay) - Biophysics - Eduardo Mizraji, Jorge Graneri

• Universidad de la República (Uruguay) - Computer science - Pablo Rodríguez-Bocca

• Duration: 2018 – 2020

• Start year: 2018

• MASC is a three-year project (code U17E03) with the Faculty of Sciences of the university of the Republic, in Uruguay, on the application of mathematical modeling tools to a better understanding of a cognitive disease called semantic dementia. This involves Prof. Eduardo Mizraji and Jorge Graneri, a PhD student whose co-advisors are Prof. Mizraji and G. Rubino from Dionysos, plus Pablo Rodríguez Bocca, from the Engineering Faculty of the university of the Republic. Our contribution to this project is around the use of mathematical tools applied to the analysis of cognition pathologies.

##### Math and Stic AmSud programs

Project “RareDep”

• Title: Rare events analysis in multi-component systems with dependent components

• International Partner (Institution - Laboratory - Researcher):

• Universidad Adolfo Ibañez (Chile) - Faculty of Engineering and Sciences - Javiera Barrera

• Universidad de la República Uruguay (Uruguay) - Computer Science - Héctor Cancela

• Universidade Federal de Pernambuco (Brazil) - Mathematics - Pablo Martín Rodríguez

• Duration: 2019 – 2020

• Start year: 2019

• The RareDep project focus on developing new techniques addressing two central elements for the improvement of the available tools for risk analysis of complex systems. One is the case of rare events, occurring both in performance and in dependability evaluation of systems modeled as made of many components. Rare events preclude the use of Monte Carlo techniques when the event of interest has a small probability of occurring, and specific methods are necessary, with many open problems in the area. Independence is the usual assumption when building models (more precisely, in almost all works in the field make this assumption), but we know that the assumption is almost never satisfied. We often are constrained by the necessity of assuming independent components in order to be able to use the available methods. In RareDep, we intend to address both problems simultaneously. This needs to develop new variance reduction techniques, for instance in the Importance Sampling family, or in the Splitting one, to be able to exploit data concerning dependencies between the components of the models. This will be built on top of our accumulated experience in the Monte Carlo area (and related fields, such as Quasi-Monte Carlo, numerical integration, etc.), and a starting effort to begin the exploration of what happens when we relax the omnipresent independence hypothesis. We will also explore what happens if we consider new ideas (several coming from the participants of the proposal) for defining new metrics in some specific areas. In these cases, everything is to be done: procedures to deal with rare events, modeling techniques to deal with dependencies between the system’s components, and then, both issues at the same time. Our main application area will concern different types of modern networks (in communications, or in energy distribution, for instance).

Project “ACCON”

• Title: Algorithms for the Capacity Crunch problem in Optical Networks

• International Partner (Institution - Laboratory - Researcher):

• Universidad de la República Uruguay (Uruguay) - Computer Science - Héctor Cancela

• UTFSM (Chile) - Télématica - Reinaldo Vallejos

• Universidad de Valparaiso (Chile) - Computer Science - Marta Barría

• Duration: 2019 – 2020

• Start year: 2019

• The rapid increase in demand for bandwidth from existing networks has caused a growth in the use of telecommunications technologies, especially WDM optical networks. So far, communication technologies have been able to meet the bandwidth demand. Nevertheless, this decade researchers have anticipated a coming “Capacity Crunch” potential problem associated with these networks. It refers to fact that the transmission capacity limit on optical fibers is close to be reached in the near future. It is then urgent to make the current network architectures evolve, in order to satisfy the relentless exponential growth in bandwidth demand. In other words, the performance bottleneck for optical infrastructures is concentrated around this limiting situation, and the most efficient way of preparing the future of these fundamental technological systems that support the backbone of the Internet is to focus on solving the related management problems. In the previously described scientific context, the ACCON project has a main scientific goal: the development of new strategies capable to provide better resource management techniques to face the threat of the Capacity Crunch. To this end, we will explore the utilization of different analytical techniques to evaluate the performance of several network architecture paradigms, in order to assess their viability in the near future. This will provide us the needed insight leading to finding new strategies for efficiently managing the network resources, and consequently, to contribute addressing this coming Capacity Crunch problem.

##### PHC Ulysses

Project “AFFINE”

• Title: Achieving Energy Efficient Communication in Future Networks by Supporting Multi-Access Edge Computing in Internet of Things (IoT)

• International Partners (Institution - Laboratory - Researcher):

• University College Dublin (Ireland) - Computer Science - Lina Xu

• Duration: 1 year

• Start year: January 2019

• Yassine Hadjadj-Aoul and Lina Xu received a grant from the PHC Ulysses (for French-Irish collaboration). The aim of this project is to improve the energy efficiency for data transmission and communication in IoT networks and therefore to reduce electricity consumption and $C{O}_{2}$ emissions.

Yann Busnel has taken part in several events to develop Indo-French collaborations, notably within the framework of Campus France. In particular, he led the round table on Artificial Intelligence and Mathematics at the Knowledge Summit 2 in Lyon in October 2019, in the presence of the Minister, Frédérique Vidal.