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Conférences

le (1h2m59s)

Decision making at scale: Algorithms, Mechanisms, and Platforms

YouTube competes with Hollywood as an entertainment channel, and also supplements Hollywood by acting as a distribution mechanism. Twitter has a similar relationship to news media, and Coursera to Universities. But there are no online alternatives for making democratic decisions at large scale as a society. In this talk, we will describe two algorithmic approaches towards large scale decision making that we are exploring. a) Knapsack voting and participatory budgeting: All budget problems are knapsack problems at their heart, since the goal is to pack the largest amount of societal value into a budget. This naturally leads to « knapsack voting » where ...
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Conférences

le (1h8m48s)

On Artificial Olfaction, and How to Test For It

For years there has been interest in the possibility of building a reliable odor reproduction system (AOS), with its vast spectrum of applications: from e-commerce, games and video, via the food and cosmetics industry, to medical diagnosis. Such a system would enable an output device — the whiffer — to release an imitation of an odor read in by an input device — the sniffer — upon command. To realize this scheme one must carry out deep and complex research that combines computer science and mathematics with chemistry and biochemistry, and brain science with psychophysical work and human physiological experimentation. ...
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Label UNT Documentaires

le (11m34s)

La microcirculation cérébrale (2000)

Le laboratoire de Recherches cérébrovasculaires du CNRS a développé une méthode originale de visualisation de la circulation sanguine du cerveau qui utilise un microscope de fluorescence à effet confocal et à balayage laser. L'objet de ce film est de montrer les images de microcinéma obtenues par ce procédé sur un cerveau de rat en conditions physiologiques et lors d'une pathologie fréquente, l'ischémie. L'injection de fluorescéine dans le plasma permet de visualiser les micro-vaisseaux. Dans un deuxième temps, l'injection de globules rouges préalablements rendus fluorecents permet d'observer le flux sanguin dans les anastomoses fonctionelles entre deux vaisseaux du même type. La ...
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Conférences

le (43m56s)

Studying Teachers’ documentation work: emergence of a theoretical approach

The documentational approach to didactics is a recent theory –less than ten years old. In this conference I will look back at the process of development of this approach. I will recall the initial context, motivating the elaboration of a specific frame for studying teachers’ documentation work. Several kinds of evolutions will be emphasized: theoretical, methodological, but also evolutions of the questions studied in the research works referring to the documentational approach. I will conclude by evidencing the perspectives for future research and further evolutions.  Adler, J. (2000). Conceptualising resources as a theme for teacher education, Journal of Mathematics Teacher Education, 3, 205–224. Guin D., Ruthven K., & Trouche, L. (Eds.). ...
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