Suis‑je romancier ?

Le poncif moderne qui admet volontiers la cohabitation de la fiction et de la critique a une triple origine : les Baudelaire-Mallarmé-Valéry qui, écrivant de la poésie, s'attachaient à la définir ; les « herméneutiques du soupçon » pour lesquelles l'interprétation devient fiction ; le post-structuralisme tel qu'inauguré par le concept de « métalangage ». L'auteur rappelle la souffrance, le doute d'écrivains érigés en modèles, tel Proust

Brunetière au Québec

Brunetière séjourna à Montréal et à Québec en 1897. Les lettres adressées au critique par ses hôtes canadiens révèlent les obstacles qu'il fallut lever pour le faire venir : méfiance du clergé, rivalité entre anglophones et francophones, entre Montréal et Québec. Sa visite constitue néanmoins une date dans les échanges culturels avec la France

iGVPT2 : an interface to computational chemistry packages for anharmonic corrections to vibrational frequencies

iGVPT2 is a program for computing anharmonic corrections to vibration frequencies, based on force field expansion of the potential energy surface in normal mode coordinates. It includes second order vibrational perturbation theory (VPT2) algorithm and its derived methods (VPT2+K, DCPT2, HDCPT2). iGVPT2 is interfaced with several computation chemistry packages to compute the potential energies and dipoles derivatives. The second, third and quartic derivatives can be computed at the same level of theory but they can be also computed using different methods via one or two computational packages. iGPVT2 includes also a very fast hybrid QM//MM approach for biomolecules. It is provided free-of-charge for non-commercial research (see \url{https://sites.google.com/site/allouchear/igvpt2})

Latin America

International audienc

Désécrire la vie

International audienceCe que j’aime dans le dernier livre d’Annie Ernaux, c’est la distance qu’elle s’impose pour raconter sa vie, c’est le mouvement vers l’anonymat qu’elle imprime à son commentaire d’un lot de photos de famille, c’est la fusion de l’intime dans le temps commun, la génération, l’époque, la culture de masse. Ce que j’aime moins, ce sont les résurgences de la France profonde, provinciale et petite-bourgeoise, le parallèle entre Auschwitz et Hiroshima, ou entre Auschwitz et le 11 septembre, le vote pour Poujade ou Arlette Laguiller

A study of engine variable geometry systems for an advanced high subsonic long range commercial aircraft

Several variable geometry high Mach inlet concepts, aimed at meeting a system noise objective of 15 EPNdB below FAR part 36, for a long range, Mach 0.9 advanced commercial transport are assessed and compared to a fixed geometry inlet with multiple splitters. The effects of a variable exhaust nozzle (mixed exhaust engine) on noise, inlet geometry requirements, and economics are also presented. The best variable geometry inlet configuration identified is a variable cowl design which relies on a high throat Mach number for additional inlet noise suppression only at takeoff, and depends entirely on inlet wall treatment for noise suppression at approach power. Relative economic penalties as a function of noise level are also presented

The structure and energetics of 3^3He and 4^4He nanodroplets doped with alkaline earth atoms

We present systematic results, based on density functional calculations, for the structure and energetics of $^3$He and $^4$He nanodroplets doped with alkaline earth atoms. We predict that alkaline earth atoms from Mg to Ba go to the center of $^3$He drops, whereas Ca, Sr, and Ba reside in a deep dimple at the surface of $^4$He drops, and Mg is at their center. For Ca and Sr, the structure of the dimples is shown to be very sensitive to the He-alkaline earth pair potentials used in the calculations. The $5s5p\leftarrow5s^2$ transition of strontium atoms attached to helium nanodroplets of either isotope has been probed in absorption experiments. The spectra show that strontium is solvated inside $^3$He nanodroplets, supporting the calculations. In the light of our findings, we emphasize the relevance of the heavier alkaline earth atoms for analyzing mixed $^3$He-$^4$He nanodroplets, and in particular, we suggest their use to experimentally probe the $^3$He-$^4$He interface.Comment: Typeset using Revtex, 20 pages and 8 Postscript file

On the possibility to consider fullerene shell C60 as a conducting sphere

Correctness of the model representing the fullerene shell C60 as a conducting sphere has been analyzed. The static and dynamical polarizabilities of the molecule C60 have been calculated on the basis of experimental data on the photo-absorption cross- section of fullerene. It has been shown that the real C60 in the static electric field behaves most likely as a set of separate carbon atoms rather than as a conducting sphere and its static polarizability exceeds by more than two times that of conducting sphere.Comment: 5 pages, 2 figure