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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 To meet future urban challenges, many cities have embarked on a process of " renaturation ", through revegetation programs and actions to increase biodiversity. These actions have many positive impacts on the health and well-being of residents. …

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 Philippe Clergeau will present the concept of regenerative urbanism, after recalling the definitions of biodiversity and ecosystems, which are essential to a liveable, sustainable city. Nature-based solutions already permeate architecture, but we …

Abstract Cities are particularly exposed to hydro-climatic hazards, now exacerbated by anthropogenic global warming. As both major sources of greenhouse gas emissions and vulnerable territories, cities are called upon to be drivers of mitigation and …

Abstract This paper examines the future of cities by shifting the focus to the African continent. The aim is to consider African cities as places for exploring new imaginaries and new ways of inhabiting the world. This reflection comes at a crucial time …

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 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 …