Events in December 2019–January 2020
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November 25, 2019
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November 26, 2019
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November 27, 2019
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November 28, 2019(1 event) Back from Supercomputing by Bruno Raffin (Datamove) – Bruno will present his report from the new trends he saw this year at supercomputing as well as explain some technical talks he liked presented at the conference. Bâtiment IMAG (442) |
November 29, 2019
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November 30, 2019
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DecemberDecember 1, 2019 |
December 2, 2019
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December 3, 2019
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December 4, 2019
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December 5, 2019(1 event) Keynote: Flandrin – |
December 6, 2019
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December 7, 2019
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December 8, 2019
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December 9, 2019
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December 10, 2019
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December 11, 2019(1 event) Phd Defense: Autonomic Resilience of Distributed IoT Applications in the Fog, by Umar Ozeer (Polaris) – Abstract: The Fog, however, is unstable because it is constituted of billions of heterogeneous devices in a dynamic ecosystem. IoT devices may regularly fail because of bulk production and cheap design. Moreover, the Fog-IoT ecosystem is cyber-physical and thus devices are subjected to external physical world conditions which increase the occurrence of failures. When failures occur in such an ecosystem, the resulting inconsistencies in the application affect the physical world by inducing hazardous and costly situations. In this Thesis, we propose an end-to-end autonomic failure management approach for IoT applications deployed in the Fog. The proposed approach recovers from failures in a cyber-physical consistent way. Cyber-physical consistency aims at maintaining a consistent behavior of the application with respect to the physical world, as well as avoiding dangerous and costly circumstances. The approach was validated using model checking techniques to verify important correctness properties. It was then implemented as a framework called F3ARIoT. This framework was evaluated on a smart home application. The results showed the feasibility of deploying F3ARIoT on real Fog-IoT applications as well as its good performances in regards to end user experience. Bâtiment IMAG Saint-Martin-d'Hères, 38400 France |
December 12, 2019
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December 13, 2019
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December 14, 2019
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December 15, 2019
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December 16, 2019
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December 17, 2019
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December 18, 2019
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December 19, 2019(1 event) Tropical approach to semidefinite programming and mean payoff games, by Mateusz Skomra (ENS Lyon) – Semidefinite programming (SDP) is a fundamental tool in convex and polynomial optimization. It consists in minimizing linear functions over spectrahedra (sets defined by linear matrix inequalities). In particular, SDP is a generalization of linear programming. In this talk, we discuss the nonarchimedean analogue of SDP, replacing the field of real numbers by the field of Puiseux series. Our methods rely on tropical geometry and, in particular, on the study of tropicalization of spectrahedra. We show that, under genericity conditions, tropical spectrahedra encode Shapley operators associated with stochastic mean payoff games. As a result, a large class of semidefinite feasibility problems defined over Puiseux series can be solved efficiently using combinatorial algorithms designed for stochastic games. Conversely, we use tropical spectrahedra to introduce a condition number for stochastic mean payoff games. We show that this conditioning controls the number of value iterations needed to decide whether a mean payoff game is winning. In particular, we obtain a pseudopolynomial bound for the complexity of value iteration provided that the number of random positions is fixed. Bâtiment IMAG (442) |
December 20, 2019(1 event) HDR defense of Panayotis Mertikopoulos (Polaris) – Online optimization and learning in games: Theory and applications HDR Jury: The traditional "pot de soutenance" will take place right after the defense at the ground floor of the IMAG building. Bâtiment IMAG (amphitheater) Saint-Martin-d'Hères, 38400 France |
December 21, 2019
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December 22, 2019
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December 23, 2019
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December 24, 2019
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December 25, 2019
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December 26, 2019
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December 27, 2019
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December 28, 2019
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December 29, 2019
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December 30, 2019
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December 31, 2019
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JanuaryJanuary 1, 2020 |
January 2, 2020
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January 3, 2020
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January 4, 2020
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January 5, 2020
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January 6, 2020
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January 7, 2020
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January 8, 2020
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January 9, 2020(1 event) Keynote: Radu Horaud – |
January 10, 2020
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January 11, 2020
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January 12, 2020
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January 13, 2020
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January 14, 2020
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January 15, 2020
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January 16, 2020(1 event) Capacity of a LoRaWAN cell, by Martin Heusse (Drakkar) – We propose a model to estimate the packet delivery rate in a LoRaWAN cell, when all nodes have the same traffic generation process and may use repetitions. The model predicts the transmission success rate for any cell range and node density, with similar traffic from all nodes. We find that the transmission success depends on striking a balance between the adverse effects of attenuation and collisions; in small cells, it is highly dependent on the suitable allocation of spreading factors, whereas using packet repetitions is more effective in large cells. Bâtiment IMAG (442) |
January 17, 2020
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January 18, 2020
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January 19, 2020
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January 20, 2020
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January 21, 2020
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January 22, 2020
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January 23, 2020(1 event) Can random matrices change the future of machine learning? by Romain Couillet (Gipsa) – Romain COUILLET (professor at CentraleSupélec, University ParisSaclay; IDEX GSTATS Chair & MIAI LargeDATA Chair, University Grenoble-Alpes) |
January 24, 2020
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January 25, 2020
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January 26, 2020
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January 27, 2020
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January 28, 2020
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January 29, 2020
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January 30, 2020(1 event) HDR Nicolas Gast – Abstract:
Bâtiment IMAG (amphitheater) Saint-Martin-d'Hères, 38400 France |
January 31, 2020
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FebruaryFebruary 1, 2020 |
February 2, 2020
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