On the capacity achieving covariance matrix for Rician MIMO channels: an asymptotic approach

The capacity-achieving input covariance matrices for coherent block-fading correlated MIMO Rician channels are determined. In this case, no closed-form expressions for the eigenvectors of the optimum input covariance matrix are available. An approximation of the average mutual information is evaluated in this paper in the asymptotic regime where the number of transmit and receive antennas converge to $+\infty$. New results related to the accuracy of the corresponding large system approximation are provided. An attractive optimization algorithm of this approximation is proposed and we establish that it yields an effective way to compute the capacity achieving covariance matrix for the average mutual information. Finally, numerical simulation results show that, even for a moderate number of transmit and receive antennas, the new approach provides the same results as direct maximization approaches of the average mutual information, while being much more computationally attractive.Comment: 56 pp. Extended version of the published article in IEEE Inf. Th. (march 2010) with more proof

Another Multidimensional Synchronous Dataflow: Simulating Array-OL in Ptolemy II

Computation intensive multidimensional applications appear in many application domains such as video processing or detection systems. We present here the Array-OL specification model to handle such multidimensional applications. This model is compared to the Multidimensional Synchronous Dataflow proposition by Lee et al. We also detail in this a new domain in the Ptolemy simulation environment dedicated to Array-OL specification simulation

Effects of a Chronic Oil Spill on the Planktonic System in San Jorge Gulf, Argentina: A One-Vertical-Dimension Modeling Approach

Known for its high biological productivity, San Jorge Gulf (SJG) in Argentinian Patagonia is also an area of oil exploitation. To understand the dynamics of the SJG plankton ecosystem under several scenarios of potential hydrocarbon (HC) contamination, we present an 11-compartment biogeochemical model coupled to a turbulence model. In the coupled model, we parameterize the main physical and biological processes related to HC contamination, such as biodegradation, growth, and mortality of phyto-, zoo-, and bacterioplankton. Planktonic responses to several levels of HC contamination are studied for two physically contrasting SJG environments, a tidally well-mixed water column and a stratified water column. Results show increasing phyto-and bacterioplankton biomass with increasing HC concentration, which in turn produces more detritus. Zooplankton communities seem to respond differently depending on HC concentration, with major indirect changes occurring in the different size classes. Effects of HC contamination on biological compartments are stronger in the stratified than in the well-mixed environment.Fil: Klotz, Philippe. Institut des Sciences de la Mer de Rimouski; Canadá. Université du Québec à Rimouski; CanadáFil: Schloss, Irene Ruth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; ArgentinaFil: Dumont, Dany. Institut des Sciences de la Mer de Rimouski; Canadá. Université du Québec à Rimouski; Canad

Assurer l'équité de l'évaluation pour un cours donné par plusieurs professeurs

Comprend des références bibliographique

Alignement curriculaire en français langue seconde au cégep Vanier cours de niveau 1 /

"La présente recherche a été subventionnée par le Cégep Vanier dans le cadre des Academic Success Projects"Comprend des références bibliographique

Rotary quern and millstone roughouts beyond their quarries

Anderson, T.J., Alonso, N. (eds), Tilting at Mills: The Archaeology and Geology of Mills and Milling. Revista d’Arqueologia de Ponent. Número Extra 4, 2019. ISBN: 9788491440291Groups of unfinished quern and millstones (roughouts) have been recovered in Western Europe in the sea, in rivers and along ancient roads. They have also been unearthed during archaeological excavations of cities and rural sites. These different assemblages share similarities: the grinding surfaces are not finished, the eyes are rarely pierced and the handle holes are not cut. These groups evidence a segmentation of the operational sequence of production in Antiquity, from block extraction to their sale, with the transport of unfinished products and final shaping taking place in workshops beyond the quarry near their place of use. This model differs from that in the Middle Ages where millstones were transported in a finished form