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Étienne Guyon, Jean-Paul Troadec
From a Bag of Marbles to a Heap of Sand
Why don't sand dunes collapse? How does sand flow in an hourglass? How is it possible to empty a silo of all its wheat? What's a ceramic? The answer to all these questions can be found in the science of the complex organizations of matter, a science which is pluridisciplinary. Étienne Guyon, head of the École Normale Supérieure, and Jean-Paul Troadec, a researcher, present the characteristics of grain matter, the rules by which it is organized (in both crystal and fluid) as well as its movements (in silos as in avalanches).
Georges Charpak
Children, Researchers and Citizens
Georges Charpak has taken the initiative for a complete reform of our methods of science teaching. He proposes a teaching method based on creativity and problem-solving, instead of the old theoretical, book-based approach. This book recounts the experiences of two teams of French educators in a research institution created by Leon Lederman in Chicago, and the lessons which we can take from their experiences. Pollens shows that to learn is to discover, and that it is in discovering that one learns. Georges Charpak is a Nobel laureate in physics, and the author of La vie à fil tendu and Feux follets et champignons nucléaires, both published by Editions Odile Jacob.