oai:HAL:hal-00782129v1 2013-01-29 type:COMM subject:info collection:UNIV-RENNES1 collection:CNRS collection:INRIA collection:INRIA-RENNES collection:IRISA collection:IRISA_SET collection:TESTINRIA

HAL CCSD Coupling 3G with DVB networks for low cost services Jedidi, Azza Tlais, Mazen Weis, Frédéric ACES (INRIA - IRISA) ; INRIA - Université de Rennes 1 - Institut National des Sciences Appliquées (INSA) - Rennes - CNRS International audience MASS'09 : International Conference on Management and Service Science Wuhan, China IEEE IEEE hal-00782129 https://hal.inria.fr/hal-00782129 https://hal.inria.fr/hal-00782129 IEEE. MASS'09 : International Conference on Management and Service Science, Sep 2009, Wuhan, China. IEEE, pp.1-5, <10.1109/ICMSS.2009.5303609> DOI : 10.1109/ICMSS.2009.5303609 en [INFO.INFO-OH] Computer Science/Other Conference papers Next generation networks will result from the convergence of the different existing technologies, taking benefit from their complementary properties . In this context, recent research has addressed Digital Video Broadcast (DVB) networks, which benefit of very high broadcast capacities, and has tried to couple them with complementary networks. In our work, we focus on DVB-SH, satellite services for hand-held devices, which is a hybrid (satellite/terrestrial) standard. We couple DVB-SH with a 3G cellular network, thus providing a bidirectional interactivity path. DVB-SH benefits from a very high bandwidth capacity that allows unidirectional IP-TV channels broadcast. A residual bandwidth in the DVB-SH path may still be available because of two reasons; the variable bit rates of served flows and/or some DVB reserved channels by the 3G provider. In our work, we focus on this small residual bandwidth and its potential utilization. The idea is to realize an efficient switching of IP data, coming from 3G networks, to the residual bandwidth of DVB Networks. The goal is to use this architecture in order to provide interactive low cost services over DVB networks. Keyword: Network convergence, DVB, 3G, residual bandwidth, switching, multimedia, low cost services 2009-09-16

oai:HAL:hal-00782130v1 2013-06-03 type:COMM subject:shs collection:CNRS collection:UNIV-MONTP3 collection:SHS collection:PRAXILING collection:AO-LINGUISTIQUE

HAL CCSD Révolution et disparition Steuckardt, Agnès PRAXILING UMR5267 (Praxiling) ; Université Paul Valéry - Montpellier III - CNRS International audience Disparitions et changements linguistiques Disparitions et changements linguistiques Claire Badiou-Monferran; Thomas Verjans hal-00782130 https://hal.archives-ouvertes.fr/hal-00782130 https://hal.archives-ouvertes.fr/hal-00782130 Claire Badiou-Monferran; Thomas Verjans. Disparitions et changements linguistiques, Dec 2010, France. à paraître fr Changement linguistique Référent Révolution française [SHS.LANGUE] Humanities and Social Sciences/Linguistics Conference papers Cette étude suit, du début de l'âge classique à la Révolution, les représentations de la disparition linguistique : si elles s'opposent sur la place réservée aux mots du passé, elles se rejoignent dans une conception de la langue que Sylvain Auroux (1986) qualifiait de " politique ", où est attribué aux locuteurs un rôle de véritables " sujets de la langue ". Dans un second temps, elle met à l'épreuve de l'expérience cette conception politique de la disparition, en prenant l'exemple des abolitions opérées pendant la période révolutionnaire. 2011

oai:HAL:hal-00504740v2 2013-06-12 type:COMM subject:info subject:spi collection:L2S collection:SUPELEC collection:SUP_LSS collection:SUP_SIGNAUX

HAL CCSD GPU implementation of a 3D bayesian CT algorithm and its application on real foam reconstruction Gac, Nicolas Vabre, Alexandre Mohammad-Djafari, Ali Rabanal, Asier Buyens, Fanny Laboratoire des signaux et systèmes (L2S) ; Université Paris XI - Paris Sud - SUPELEC - UMR8506 CNRS Laboratoire d'Intégration des Systèmes et des Technologies (LIST) Financement OMTE DIGITEO 5 pages International audience The 1st CT Meeting Proceedings The First International Conference on Image Formation in X-Ray Computed Tomography Salt Lake City, United States hal-00504740 https://hal.archives-ouvertes.fr/hal-00504740 https://hal.archives-ouvertes.fr/hal-00504740/document https://hal.archives-ouvertes.fr/hal-00504740 The First International Conference on Image Formation in X-Ray Computed Tomography, Jun 2010, Salt Lake City, United States. http://www.ucair.med.utah.edu/CTmeeting/ProceedingsCTMeeting2010.pdf, pp.151-155 en Computed Tomograhy (CT) Iterative 3D reconstruction Bayesian estimation GPU implementation [INFO.INFO-IM] Computer Science/Medical Imaging [INFO.INFO-DC] Computer Science/Distributed, Parallel, and Cluster Computing [INFO.INFO-TS] Computer Science/Signal and Image Processing [SPI.SIGNAL] Engineering Sciences/Signal and Image processing Conference papers A great number of image reconstruction algorithms, based on analytical filtered backprojection, are implemented for X-ray Computed Tomography (CT) [1, 3]. The limits of these methods appear when the number of projections is small, and/or not equidistributed around the object. In this specific context, iterative algebraic methods are implemented. A great number of them are mainly based on least square criterion. Recently, we proposed a regularized version based on Bayesian estimation approach. The main problem that appears when using such methods as well as any iterative algebraic methods is the computation time and especially for projection and backprojection steps. In this paper, first we show how we implemented some main steps of such algorithems which are the forward projection and backward backprojection steps on GPU hardware, and then we show some results on real application of the 3D tomographic reconstruction of metallic foams from a small number of projections. Through this application, we also show the good quality of results as well as a significant speed up of the computation with GPU implementation. projet TomoX 2010-06-21