Séminaires du LINA

Séminaire PolytechNantes présenté par Benjamin Bach http://benjbach.me/ @benjbach Abstract: While networks are often used to represent data, they are among the most complex structures to understand; representing a natural phenomena such as social relationships, trading flows, or brain connectivity as a network requires powerful tools to make sense of the network topology and its attributes. While there are many quantitative statistics to measure a network, visualization provides the means for a higher-level understanding and hypothesis formulation. This talk gives an overview of my previous work in the areas of visualizing dynamic networks, temporal data, and to approach a better understanding how to convey changes in a networks. While a visualization should work and convey as much information as possible without requiring to interact, most real-world problems require interaction to filter, change, adapt, search, or change perspectives on the data. The talk also discusses approaches to provide interactive visualizations to domain experts and how the use of visualizations in the wild can be facilitated. Bio: Benjamin is a postdoctoral research fellow at Monash University, Australia. His research focuses on interactive information visualizations to help domain experts in different domains, including astronomy, history, archeology and neuroscience explore and present their data visually. Research in these areas includes dynamic and multivariate networks, temporal data, and story-telling techniques. Benjamin and has previous been a postdoctoral research at Microsoft Research—Inria Joint centre. He was a visiting scientist at the University of Washington, WA and Microsoft Research, Redmond. He obtained his PhD in 2014 from the Université Paris Sud, France. http://www.aviz.fr/~bbach/

Guy Pujolle, professeur à l'Université Paris 6, parle du monde des réseaux qui aborde une rupture totale avec tout ce qui était connu, rupture provenant des techniques de virtualisation et du Cloud. Enregistré en 2014 lors des Séminaires du LINA.

Denis Bouyssou, directeur de recherche au CNRS au sein du laboratoire LAMSADE (Université Paris Dauphine), montre quels problèmes soulèvent l’évaluation de la recherche via l’utilisation de ces indicateurs. Enregistré en 2014 lors des Séminaires du LINA.

Gilles Dowek a fortement participé à la définition d’un nouvel enseignement de l’informatique dans le secondaire et en classes préparatoires. C’est ce dont il parle dans ce séminaire du LINA, enregistré en 2013.

The dynamic instability of living systems and the “superposition” of different forms of randomness will be viewed as components of the contingently changing, or even increasing, organization of life through ontogenesis or evolution. To this purpose, we first survey how classical and quantum physics define randomness differently. We then discuss why this requires, in our view, an enriched understanding of the effects of their concurrent presence in biological systems’ dynamics. Biological randomness is then presented as an essential component of the heterogeneous determination and intrinsic unpredictability proper to life phenomena, due to the nesting and interaction of many levels of organization, but also as a key component of its structural stability. We will note as well that increasing organization, while increasing “order”, induces growing disorder, not only by energy dispersal effects, but also by increasing variability and differentiation. Finally, we discuss a possible difference between biological complexity and organization, which may provide a tool for understanding some aspects of cancer.