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e-ciencia.com

adéntrate en el apasionante mundo de la ciencia y la tecnología y descubre una gran cantidad de contenido relacionado con tus temas favoritos.

eltamiz.com

bienvenido el tamiz es una página de divulgación científica que intenta hacer llegar la ciencia a todos siguiendo el lema “antes simplista que …

necs.inrialpes.fr

necs is an inria/gipsa-lab joint team/project (started in january 2007) supported by the cnrs, inria, inpg and ujf. the team goal is to develop a new control framework for assessing problems raised by the consideration of new technological low-cost and wireless components, the increase of systems complexity and the distributed and dynamic location of sensors (sensor networks) and actuators. in this framework, control design is performed under general resources constraints including communication, computation, and energy. in that, the team targets an innovative step forward in the feedback design for networked distributed systems by the development of combined control, computing & communication (3c). the team is bi-located at inria rhã´ne-alpes (montbonnot saint martin) and at the gipsa-lab (at the grenoble campus).

hal-onera.archives-ouvertes.fr

Context. During the evolution of protoplanetary disks into planetary systems we expect to detect signatures that trace mechanisms such as planet–disk interaction. Protoplanetary disks display a large variety of structures in recently published high-spatial resolution images. However, the three-dimensional morphology of these disks is often difficult to infer from the two-dimensional projected images we observe. Aims. We aim to detect signatures of planet–disk interaction by studying the scattering surface of the protoplanetary disk around HD 34282. Methods. We spatially resolved the disk using the high-contrast imager VLT/SPHERE in polarimetric imaging mode. We retrieved a profile for the height of the scattering surface to create a height-corrected deprojection, which simulates a face-on orientation. Results. The detected disk displays a complex scattering surface. An inner clearing or cavity extending up to r < 0.′′28 (88 au) is surrounded by a bright inclined ( i = 56°) ring with a position angle of 119°. The center of this ring is offset from the star along the minor axis with 0.′′07, which can be explained with a disk height of 26 au above the midplane. Outside this ring, beyond its southeastern ansa we detect an azimuthal asymmetry or blob at r ~ 0.′′4. At larger separation, we detect an outer disk structure that can be fitted with an ellipse, which is compatible with a circular ring seen at r = 0.′′62 (=190 au) and a height of 77 au. After applying a height-corrected deprojection we see a circular ring centered on the star at 88 au; what had seemed to be a separate blob and outer ring could now both be part of a single-armed spiral. Conclusions. We present the first scattered-light image of the disk around HD 34282 and resolve a disk with an inner cavity up to r ≈ 90 au and a highly structured scattering surface of an inclined disk at a large height H scat ∕ r = 0.′′29 above the midplane at the inner edge of the outer disk. Based on the current data it is not

xatakaciencia.com

La música puede escucharse comúnmente en los quirófanos. Se ha demostrado que la música disminuye el estrés del equipo quirúrgico y reduce la ansiedad del...

naukas.com

Y para cerrar esta temporada, ¡un poco de neuroanatomía del sistema nervioso central!