BRÉF – Revised database of elected representatives in France

4 December 2023

The Revised Database of Elected Officials in France (BRÉF) is built from a primary source, the National Directory of Elected Officials (RNE), along with several secondary sources, including databases from the National Assembly, the Senate, and the European Parliament. The intention is to expand this database further by fully leveraging these secondary sources and, in the longer term, by integrating new databases and occasional contributions.

Abuse Detection in Online Conversations

4 December 2023

This software was designed to detect abusive messages in online conversations. Two main approaches are implemented: a content-based approach and a graph-based approach, which can also be used jointly. This software was applied to a corpus of chat messages written in French, which unfortunately cannot be published due to legal matters. The conversational graphs extracted from this text are publicly available on Zenodo, though.

Cornet Seminar – Andrea Fox – 08/12/2023

22 November 2023

In the context of team Cornet’s seminars, Andrea Fox (LIA) will present his research work on Safe Reinforcement Learning for Video Admission Control, on December 8, 2023, at 11:35 in the meeting room. Abstract: Mobile video cameras have become a pervasive commodity and represent an important candidate source to enhance video analytic applications. Yet, while available in large quantities, the limitations of the edge computing infrastructure require the careful selection of which video flows to process at any point in time to maximize the amount of information extracted by deployed applications. In this paper, we present an admission control scheme for mobile video streams originating from different areas and dispatched to multiple processing servers over an edge computing infrastructure. We introduce a model rooted in the theory of Constrained Markov Decision Processes (CMDPs) that captures the problem of ensuring adequate area coverage to applications, while accounting for constraints of edge servers and access network capacity. On top of this model, we develop two new policies based on specialized primal-dual constrained Reinforcement Learning methods that solve the optimal admission control problem. The first, called DR-CPO, adopts reward decomposition reinforcement learning. This technique effectively mitigates state-space explosion, achieves optimality, and significantly accelerates Plus d'infos

Cornet Seminar – Olivier Bilenne – 24/11/2023

22 November 2023

In the context of team Cornet’s seminars, Olivier Bilenne (LIA) will present his research work on Implementing fictitious play in partially observable stochastic games, on November 24, 2023, 11:35 in the meeting room. Abstract: Extensions of fictitious play to stochastic games have been recently examined in combination with reinforcement learning techniques inherent to Markov decision processes. We revisit this approach in the context of partially observable stochastic games. For this, we consider a two-player (finite-state) zero-sum stochastic game where one player (the attacker) has full visibility of the system, whereas the other player (the defender) has no access to the state of the opponent and must instead compose with public sources of information (in our setting: the actions played and their associated payoffs). We study a fictitious play dynamics where the players best response to the estimated empirical frequencies of action of their opponent. This sequence of play requires from the players to form beliefs on both their opponent’s strategy and on their own continuation payoff (modeled by a Q-function), based on the (full or partial) information that is available to them. The strategy estimation scheme, in particular, features a correction mechanism making up for delayed symptoms in the partially Plus d'infos

Cornet Seminar – Willie Kouam – 29/09/2023

29 September 2023

In the context of team Cornet’s seminars, Willie Kouam (LIA) will present his research work on Asymmetric Centrality Game against Network Epidemic Propagation, on September 29, 2023, at 11:35 in the meeting room.

Cornet Seminar – Wesley Coelho – 14/09/2023

14 September 2023

In the context of team Cornet’s seminars, Wesley Coelho (Pasqal) will present his research work on Solving optimization problems with PASQAL quantum computers, on September 14, 2023, at 11:35 in the meeting room. Abstract: The emergence of quantum devices opens many exciting perspectives in the high-performance computing world. Among other quantum platforms, fully programmable neutral atom devices display unique characteristics and, by better controlling quantum entanglement and superposition, they represent a powerful tool to tackle complex problems and computing challenges. In this talk, Clément de Terrasson and Wesley Coelho will show how PASQAL Quantum Computers are used to address complex optimization problems. They will also propose a workshop where participants will be able to use PASQAL solutions to solve optimization problems.

PhD defense of Sarkis Moussa – 30 June 2023

30 June 2023

Date: Friday, June 30, 2023. 2pm Place: thesis room (salle des thèses) at the Hannah Arendt campus. For those unable to attend, here is the BBB link for the video conference: https://v-au.univ-avignon.fr/live/bbb-soutenance-de-these-sarkis-moussa-30-juin-2023/ Title: Architecture and Protocols for Public Safety Users in the 5G Cellular Networks Abstract: Public Safety Networks (PSNs) are wireless communication systems designed to meet the needs of emergency responders, including firefighters, police, and many other Public Safety (PS) agencies. These networks are used to prevent or respond to incidents that pose a threat to people or property. Traditionally, these PSNs were supported by reliable, but low-rate radio technologies that provide limited services such as voice communication among Public Safety Users (PSUs). Consequently, their capability to take advantage of recent developments in wireless networks and broadband applications was restricted. At the forefront of wireless communication technologies, 5th Generation (5G) and beyond Cellular Networks (CNs), are ideal for this purpose due to their advanced infrastructure and tailored techniques developed for broadband services. Their capacity for high data transmission, low latency in data exchange, and ability to support a significant number of connected devices make them perfectly suited to overcome the limitations associated with PSNs. Integrating PSNs into 5G can Plus d'infos

Cornet Seminar – Éric Bourreau – 23/06/2023

23 June 2023

In the context of team Cornet’s seminars, Éric Bourreau (LIRMM) will present his research work on Quantum Computers, a New Information Technology Revolution?, on June 23, 2023, at 11:35 in the meeting room. Abstract: The concept of quantum computing dates back to the late 1980s, and the first quantum algorithms were born in the 1990s. However, the novelty of recent years is the construction of actual quantum machines that are beginning to validate the theory. This seminar will attempt to explain how the definition of QuBits (quantum bits) gives rise to a new paradigm of computation. We will try to understand what computational power is now being offered and at what point quantum optimization could become competitive with ‘classical’ optimization methods.

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