Institution
University of Grenoble
Education•Saint-Martin-d'Hères, France•
About: University of Grenoble is a education organization based out in Saint-Martin-d'Hères, France. It is known for research contribution in the topics: Population & Context (language use). The organization has 25658 authors who have published 45143 publications receiving 909760 citations.
Papers published on a yearly basis
Papers
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TL;DR: A deep convolutional neural network is introduced on raw EEG samples for supervised learning of 5-class sleep stage prediction and a method for visualizing class-wise patterns learned by the network is presented.
286 citations
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TL;DR: The luminosity determination for the ATLAS detector at the LHC during pp collisions at s√= 8 TeV in 2012 is presented in this article, where the evaluation of the luminosity scale is performed using several luminometers.
Abstract: The luminosity determination for the ATLAS detector at the LHC during pp collisions at s√= 8 TeV in 2012 is presented. The evaluation of the luminosity scale is performed using several luminometers ...
286 citations
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TL;DR: In this article, the Hall effect was used to generate a dominant azimuthal magnetic field and a large-scale Maxwell stress throughout the midplane of the disc, provided that the angular velocity and magnetic field satisfy Ω·B > 0.
Abstract: Protoplanetary discs are poorly ionised due to their low temperatures and high column
densities and are therefore subject to three “non-ideal” magnetohydrodynamic (MHD)
effects: Ohmic dissipation, ambipolar diffusion, and the Hall effect. The existence of
magnetically driven turbulence in these discs has been a central question since the
discovery of the magnetorotational instability (MRI). Early models considered Ohmic
diffusion only and led to a scenario of layered accretion, in which a magnetically “dead”
zone in the disc midplane is embedded within magnetically “active” surface layers at
distances of about 1–10 au from the central protostellar object. Recent work has suggested
that a combination of Ohmic dissipation and ambipolar diffusion can render both the
midplane and surface layers of the disc inactive and that torques due to magnetically
driven outflows are required to explain the observed accretion rates. We reassess this
picture by performing three-dimensional numerical simulations that include all three
non-ideal MHD effects for the first time. We find that the Hall effect can generically
“revive” dead zones by producing a dominant azimuthal magnetic field and a large-scale
Maxwell stress throughout the midplane, provided that the angular velocity and magnetic
field satisfy Ω·B > 0. The
attendant large magnetic pressure modifies the vertical density profile and substantially
increases the disc scale height beyond its hydrostatic value. Outflows are produced but
are not necessary to explain accretion rates ≲
10-7 M⊙ yr-1. The flow in the disc midplane
is essentially laminar, suggesting that dust sedimentation may be efficient. These results
demonstrate that if the MRI is relevant for driving mass accretion in protoplanetary
discs, one must include the Hall effect to obtain even qualitatively correct results.
286 citations
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TL;DR: In this article, the discovery of the first four Canada-France High-z Quasar Survey (CFHQS) quasars at redshifts greater than 6 was presented, including the most distant known quasar, CFHQS J2329-0301 at z = 6.43.
Abstract: The Canada-France High-z Quasar Survey (CFHQS) is an optical survey designed to locate quasars during the epoch of reionization. In this paper we present the discovery of the first four CFHQS quasars at redshifts greater than 6, including the most distant known quasar, CFHQS J2329-0301 at z = 6.43. We describe the observational method used to identify the quasars and present optical, infrared, and millimeter photometry and optical and near-infrared spectroscopy. We investigate the dust properties of these quasars, finding an unusual dust extinction curve for one quasar and a high far-infrared luminosity due to dust emission for another. The mean millimeter continuum flux for CFHQS quasars is substantially lower than that for SDSS quasars at the same redshift, likely due to a correlation with quasar UV luminosity. For two quasars with sufficiently high signal-to-noise ratio optical spectra, we use the spectra to investigate the ionization state of hydrogen at z > 5. For CFHQS J1509-1749 at z = 6.12 we find significant evolution (beyond a simple extrapolation of lower redshift data) in the Gunn-Peterson optical depth at z > 5.4. The line of sight to this quasar has one of the highest known optical depths at z ≈ 5.8. An analysis of the sizes of the highly ionized near-zones in the spectra of two quasars at z = 6.12 and 6.43 suggest that the intergalactic medium surrounding these quasars was substantially ionized before these quasars turned on. Together, these observations point toward an extended reionization process, but we caution that cosmic variance is still a major limitation in z > 6 quasar observations.
285 citations
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TL;DR: In this paper, the forward-backward asymmetry in top quark-antiquark production in proton-antiproton collisions in the final state containing a lepton and at least four jets was measured.
Abstract: We present a measurement of forward-backward asymmetry in top quark-antiquark production in proton-antiproton collisions in the final state containing a lepton and at least four jets. Using a dataset corresponding to an integrated luminosity of $5.4\,\mathrm {fb}^{-1}$, collected by the \DZ\ experiment at the Fermilab Tevatron Collider, we measure the \ttbar\ forward-backward asymmetry to be $(9.2 \pm 3.7)$% at the reconstruction level. When corrected for detector acceptance and resolution, the asymmetry is found to be $(19.6 \pm 6.5)$%. We also measure a corrected asymmetry based on the lepton from a top quark decay, found to be $(15.2 \pm 4.0)$%. The results are compared to predictions based on the next-to-leading-order QCD generator {\sc mc@nlo}. The sensitivity of the measured and predicted asymmetries to the modeling of gluon radiation is discussed.
285 citations
Authors
Showing all 25961 results
Name | H-index | Papers | Citations |
---|---|---|---|
Dieter Lutz | 139 | 671 | 67414 |
Marcella Bona | 137 | 1391 | 92162 |
Nicolas Berger | 137 | 1581 | 96529 |
Cordelia Schmid | 135 | 464 | 103925 |
J. F. Macías-Pérez | 134 | 486 | 94715 |
Marina Cobal | 132 | 1078 | 85437 |
Lydia Roos | 132 | 1284 | 89435 |
Tetiana Hryn'ova | 131 | 1059 | 84260 |
Johann Collot | 131 | 1018 | 82865 |
Remi Lafaye | 131 | 1012 | 83281 |
Jan Stark | 131 | 1186 | 87025 |
Sabine Crépé-Renaudin | 129 | 1142 | 82741 |
Isabelle Wingerter-Seez | 129 | 930 | 79689 |
James Alexander | 129 | 886 | 75096 |
Jessica Levêque | 129 | 1006 | 70208 |