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Abstract When it comes to building, as with energy, the new doesn't make the old disappear. The extraordinary rise of concrete between 1950 and 2000, far from eradicating other building materials, allowed them to grow : glass of course, steel, wood, but …

Abstract New York, the city of exile for the Surrealists and ethnologist Claude Lévi-Strauss, is the capital of the modern, but also the refuge of the archaic. " Ali Baba's cave ", it provides backdoor exits and an escape from the time of …

Abstract The immense diversity of floral characteristics (flower shape, size and color, floral odors) is commonly explained by the shared evolutionary history between plants and pollinators. The many species of pollinator are thought to have played a …

Abstract In the history of life, the first interactions between plants and pollinators were almost concomitant with the appearance of flowering plants, or even preceded it. Through natural selection mechanisms, they led to the evolution of traits that …

Abstract In the past few years, there has been considerable activity around a set of quantum bounds on transport coefficients (viscosity, conductivity) and chaos (Lyapunov exponents), relevant at low temperatures. The interest comes from the fact that …

Abstract In these last two lectures, we are interested in models of random (q+1)-regular graphs with N vertices. We study the spectral hole of the adjacency matrix, in the limit where N tends to infinity. We present a result by Joel Friedman, and several …

Abstract Political debates offer citizens a unique opportunity to appreciate the position of political representatives on the most controversial issues of the day. In view of the active expression of the various players in political life, these debates …

Abstract NLP for linguistics, with a brief detour into NLP applications for the humanities and social sciences. Linguistics as a field of application for NLP, in three examples : computational morphology and morphological complexity ; computational …

Abstract Hyperbolic systems in dimension 1 of space play a crucial role in various real-life domains such as navigable rivers, irrigation canals, heat exchangers, chemical reactors, gas pipelines, road traffic, chromatography, and many others. This talk …

Abstract People seem to have an early understanding of the world around them, and the other people in it. Before children can reliably say "ball", "wall", or "Saul", they expect balls not to go through walls, and for Saul to go right for a ball (if …

The Origins of Geometric Symbols since Prehistory: A Language of Thought? Abstract In the Lascaux cave, just below the magnificent drawing of a large deer, is the simple but unmistakable outline of a rectangle. All over the world, since prehistoric times, …

Abstract For centuries, it was expected that all planetary systems, by virtue of the universality of physical laws, would roughly resemble our own, with small rocky planets on the inside and gas giants on the outside, all on nearly circular, coplanar …

Abstract In low- and middle-income countries, there are many small businesses, and few large ones. How can this be explained ? And how do companies in poor countries operate ? Are they as productive ? Do they face specific …

Abstract After an introduction to the entire course and seminar, the first lecture traced the appearance of control structures in the first programming languages (1945-1965) : assembly languages, where control is expressed by unconditional or conditional …