Search results for "jets [Galaxies]"
showing 10 items of 488 documents
The Highly Collimated Radio Jet of HH 80–81: Structure and Nonthermal Emission
2017
Radio emission from protostellar jets is usually dominated by free-free emission from thermal electrons. However, in some cases, it has been proposed that non-thermal emission could also be present. This additional contribution from non-thermal emission has been inferred through negative spectral indices at centimeter wavelengths in some regions of the radio jets. In the case of HH 80-81, one of the most powerful protostellar jets known, linearly polarized emission has also been detected, revealing that the non-thermal emission is of synchrotron nature from a population of relativistic particles in the jet. This result implies that an acceleration mechanism should be taking place in some pa…
Instability of relativistic sheared jets and distinction between FRI and FRII sources
2002
We investigate the shear-driven instability of nonmagnetic relativistic jets with the bulk velocity, V , dependent on the cylindric radius, r. It is shown that instability can arise for any dependence of the velocity (or the Lorentz factor that is the same) on r. The shear-driven instability can e ectively operate in the whole volume of a jet. The growth time can be shorter than that of the Kelvin-Helmholtz instability. The considered instability leads to a turbulization of jets and can account for a distiction between the jets in the FRI and FRII sources. Urpin, V., Vadim.Urpin@uv.es
Motion Analysis for Dynamic 3D Scene Reconstruction and Understanding
2017
This thesis studies the problem of dynamic scene 3D reconstruction and understanding using a calibrated 2D-3D camera setup mounted on a mobile platform via the analysis of objects' motions. For static scenes, the sought 3D map reconstruction can be obtained by registering the point cloud sequence. However, with dynamic scenes, we require a prior step of moving object elimination, which yields to the motion detection and segmentation problems. We provide solutions for the two practical scenarios, namely the known and unknown camera motion cases, respectively. When camera motion is unknown, our 3D-SSC and 3D-SMR algorithms segment the moving objects by analysing their 3D feature trajectories.…
"Table 1" of "Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC"
2012
(1) Number of generated MC events for the scalar top signal grid (2) Relative Cross section uncertainties for the scalar top signal grid.
"Table 18" of "Searches for supersymmetry with the ATLAS detector using final states with two leptons and missing transverse momentum in sqrt{s} = 7 …
2011
The PT distribution of the second highest PT lepton in opposite-sign dilepton events.
The Recomposition of Bureaucratic Forms in Territorial Development. Territorial Engineering and Intermediation in Project Territories
2013
L’ingénierie territoriale mobilise un répertoire de savoirs et d’objets intermédiaires au cœur du processus de création territoriale. Cet équipement cognitif est nécessaire à la cohésion de l’action publique multiniveaux au sein du territoire de projet. Dans ce contexte, bien que les modalités de gestion des contrats d’action publique ne dénaturent par la fonction médiatrice de ce répertoire, elles sont standardisées par les forces de l’isomorphisme institutionnel. L’ingénierie territoriale se bureaucratisant, elle administre des procédures qui font des territoires des segments d’exécution d’une politique définie indépendamment des enjeux territoriaux. At the heart of territorial processing…
"Table 91" of "Study of jets produced in association with a W boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector"
2014
The predicted W+jets cross section as a function of HT for jet multiplicities >= 4 and jet PT > 20 GeV.
"Table 38" of "Study of jets produced in association with a W boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector"
2014
The predicted W+jets cross section as a function of HT for jet multiplicities >= 1 and jet PT > 30 GeV.
"Table 90" of "Study of jets produced in association with a W boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector"
2014
The predicted W+jets cross section as a function of HT for jet multiplicities >= 3 and jet PT > 20 GeV.
"Table 41" of "Study of jets produced in association with a W boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector"
2014
The predicted W+jets cross section as a function of HT for jet multiplicities >= 4 and jet PT > 30 GeV.