Regards sur les paradigmes féministes en recherche

Huit spécialistes ont accepté de répondre à trois questions sur l’émergence, la variété et l’avenir des paradigmes féministes en recherche. Ces personnes viennent d’universités différentes, de disciplines différentes et font aussi partie de générations différentes.Cette discussion n’a pas vraiment eu lieu, et c’est pourquoi elle est qualifiée de « virtuelle ». Toutefois, un échange a pu être constitué avec les réponses reçues. Il témoigne d’opinions contrastées, allant de l’optimisme au pessimisme, au sujet de l’influence des paradigmes féministes sur l’ensemble de la recherche universitaire.Eight professors were invited to answer three questions on the apparition, the variety and the future of feminist paradigms in research. They come from different universities, different disciplines and different generations. This discussion is called "virtual", because the participants have never met. The dialogue presented has been fabricated with the answers received. It reveals contrasted opinions, from optimism to pessimism, about the influence of feminist paradigms on the whole of learned research

Passive monitoring of anisotropy change associated with the Parkfield 2004 earthquake

International audienceWe investigate temporal variations in the polarization of surface waves determined using ambient seismic noise cross-correlations between station pairs at the time of the Mw 6.0 Parkfield earthquake of September 28, 2004. We use data recorded by the High Resolution Seismic Network's 3-component seismometers located along the San Andreas Fault. Our results show strong variations in azimuthal surface wave polarizations, Psi, for the paths containing station VARB, one of the closest stations to the San Andreas Fault, synchronous with the Parkfield earthquake. Concerning the other station pair, only smooth temporal variations of Y are observed. Two principal contributions to these changes in Y are identified and separated. They are: (1) slow and weak variations due to seasonal changes in the incident direction of seismic noise; and (2) strong and rapid rotations synchronous with the Parkfield earthquake for paths containing station VARB. Strong shifts in Y are interpreted in terms of changes in crack-induced anisotropy due to the co-seismic rotation of the stress field. Because these changes are only observed on paths containing station VARB, the anisotropic layer responsible for the changes is most likely localized around VARB in the shallow crust. These results suggest that the polarization of surface waves may be very sensitive to changes in the orientations of distributed cracks and that implementation of our technique on a routine basis may prove useful for monitoring stress changes deep within seismogenic zones. Citation: Durand, S., J. P. Montagner, P. Roux, F. Brenguier, R. M. Nadeau, and Y. Ricard (2011), Passive monitoring of anisotropy change associated with the Parkfield 2004 earthquake, Geophys. Res. Lett., 38, L13303, doi: 10.1029/2011GL047875

Multi-modal image fusion for small animal studies in in-line PET /3T MRI

Congrès sous l’égide de la Société Française de Génie Biologique et Médical (SFGBM).National audienceIn the framework of small animal multi-modal imaging, the current progression of the IMAPPI project is illustrated by the design of an in-line PET/MRI prototype, coupled to a dedicated multi-resolution registration method allowing the robust fusion of data coming from both modalities. The first results show a good alignment of the data from tumor imaging at the level of the abdomen