RésuméCet article est consacré à l’histoire de la théorie locale des courbes “à double courbure”. Initiée par Clairaut en 1731, cette théorie se développe en parallèle à la théorie des surfaces et trouve son achèvement avec les formules de Serret et Frenet et leur interprétation par Darboux, en 1887. Au delà de l’analyse des contributions de nombreux mathématiciens, parmi lesquels Monge bien sûr mais aussi Fourier, Lagrange et Cauchy, notre étude donne un regard particulier sur l’évolution conjointe de l’Analyse et (...) de la Géométrie, dans une longue période riche de nombreuses remises en cause théoriques. (shrink)

Denyse et Philippe Durand-Ruel commencent leur collection de tableaux et d’objets d’art au début des années soixante : ils héritent alors d’une partie de la collection de tableaux impressionnistes qui avait été constituée par l’arrière-grand-père de Philippe Durand-Ruel. Ils décident de poursuivre cette collection. Leur intention première était de faire le lien entre le temps des impressionnistes et l’époque contemporaine, mais ils se rendent rapidement compte que des peintres comme Picasso...

My review of Cordelia Fine's new book, Delusions of Gender: How Our Minds, Society, and Neurosexism Create Difference: The gender wars take no prisoners. In 2005, suggesting that there might indeed be innate differences between men and women derailed the career of Harvard president Larry Summers. He reemerged, years later, as President Obama’s sometime finance guru). Meanwhile, a host of neuroscientists report differences between the brains of men and women that, they say, account for different abilities and career choices. Psychologist (...) and author Cordelia Fine disagrees with the neuroscientists. In Delusions of Gender: How Our Minds, Society, and Neurosexism Create Difference, she has no time for the "special powers" that pop brain science currently imputes to the female brain, reminding us that such claims were made long before the magnetic resonance imaging machine was invented. (shrink)

A great deal has been made of the question of whether nano-materials provide a unique set of ethical challenges. Equally important is the question of whether they provide a unique set of regulatory challenges. In the last 18 months, the US Environmental Protection Agency has begun the process of trying to meet the regulatory challenge of nano using the Toxic Substances Control Act (1976)(TSCA). In this central piece of legislation, ‘newness’ is a critical concept. Current EPA policy, we argue, does (...) not adequately (or ethically) deal with the novelty of nano. This paper is an exploration of how to do a better job of accounting for nanomaterials as ‘new.’ We explore three alternative ways that nanomaterials might be made to fall under the TSCA regulatory umbrella. Since nanomaterials are of interest precisely because of the exciting new properties that emerge at the nano-scale, each of these three alternatives must meet what we call the ‘novelty condition’ and avoid what we call the ‘central paradox’ of existing regulatory policy. Failure to meet either of these conditions is a moral failure. We examine both the strengths and weaknesses of each alternative in order to illuminate the conceptual, practical, and moral challenges of novelty. (shrink)

A great deal has been made of the question of whether nano-materials provide a unique set of ethical challenges. Equally important is the question of whether they provide a unique set of regulatory challenges. In the last 18 months, the US Environmental Protection Agency has begun the process of trying to meet the regulatory challenge of nano using the Toxic Substances Control Act (1976)(TSCA). In this central piece of legislation, ‘newness’ is a critical concept. Current EPA policy, we argue, does (...) not adequately (or ethically) deal with the novelty of nano. This paper is an exploration of how to do a better job of accounting for nanomaterials as ‘new.’ We explore three alternative ways that nanomaterials might be made to fall under the TSCA regulatory umbrella. Since nanomaterials are of interest precisely because of the exciting new properties that emerge at the nano-scale, each of these three alternatives must meet what we call the ‘novelty condition’ and avoid what we call the ‘central paradox’ of existing regulatory policy. Failure to meet either of these conditions is a moral failure. We examine both the strengths and weaknesses of each alternative in order to illuminate the conceptual, practical, and moral challenges of novelty. (shrink)

Comment produire une recherche sur les femmes et rendre compte de leurs mobilisations dans un pays d’une extrême pauvreté, marqué par une histoire terriblement violente, des rapports sociaux de sexe, de classe, de race fortement inégalitaires, une mauvaise répartition des richesses et des savoirs (hérités de la colonisation, l’esclavage, l’occupation, les dictatures, les catastrophes, et de l’ingérence des organisations non gouvernementales internationales), dans un contexte de fort patriarca...

Sur la couverture des albums parus aux éditions Delcourt, on peut lire « Marcel Proust, À la recherchedu temps perdu, adaptation et illustrations de Stéphane Heuet ». En affichant ainsi son rôle avec modestie,l’adaptateur-illustrateur réussit à faire endosser à Proust la paternité littéraire d’une BD , ce qui n’est pas rien. Comble d’ironie ou de provocation, la Recherche illustrée par Heuet,c’est Tintin au pays des Guermantes. Dans les cases rectangulaires d’un strip standard au graphisme résolument« ligne claire », ceux (...) qui aiment la phrase proustienne en ses méandres, avec sa lecture au lentcours, découvrent une ligne TGV : Un amour de Swann en deux albums de 517 dessins, au lieu des200 pages en Pléiade. Cette alliance contre-nature est dénoncée par certains défenseurs de la littératurequi y voient une dénaturation de l’oeuvre et par des amoureux de la BD d’auteur qui déplorent une BDsans audace graphique. L’objet de cet article est de répondre à ces deux objections.On the cover of an album series published by Delcourt is written “Marcel Proust, À la recherche du tempsperdu, adaptation and illustrations by Stéphane Heuet”. With such an unassuming announcement of his role,the adaptor-illustrator manages to ascribe the literary paternity of a comic strip to Proust himself, which is no mean feat. And as a final irony or provocation, the “Recherche du temps perdu” illustrated by Heuet becomes “Tintin in the Land of the Guermantes”. As they peruse the rectangularframes of a classic comic strip with their “clear line” graphic style, those who enjoy a leisurely ramblethrough Proust’s meandering paragraphs may well find themselves aboard a high-speed train at full throttle:“Un amour de Swann” in two albums and 517 drawings, instead of 200 pages from the publisher Pléiade. Thisunnatural alliance has been denounced by advocates of literature as a travesty of Proust’s work, and bydevotees of authored comic strips as a work devoid of graphic boldness. This article sets out to answer both ofthese objections. (shrink)