Ordonnancement, assignation et transformations dynamiques de graphe simultanés pour projeter efficacement des applications sur CGRAs

National audiencePorter une application sur une architecture reconfigurable à gros grain est une tâche complexe qui reste encore souvent réalisée entièrement ou partiellement manuellement. Cet article présente un flot original de synthèse automatisé basé sur des étapes d'ordonnancement et d'assignation simultanées. L'approche proposée parcourt en sens inverse les noeuds du modèle formel extrait à partir du code de l'application compilé pour le transformer dynamiquement uniquement si nécessaire. Les résultats des expériences montrent que l'approche proposée permet une meilleure exploration de l'espace de solution et obtient la meilleure latence dans 90% des cas

The Changing Landscape for Stroke\ua0Prevention in AF: Findings From the GLORIA-AF Registry Phase 2

Background GLORIA-AF (Global Registry on Long-Term Oral Antithrombotic Treatment in Patients with Atrial Fibrillation) is a prospective, global registry program describing antithrombotic treatment patterns in patients with newly diagnosed nonvalvular atrial fibrillation at risk of stroke. Phase 2 began when dabigatran, the first non\u2013vitamin K antagonist oral anticoagulant (NOAC), became available. Objectives This study sought to describe phase 2 baseline data and compare these with the pre-NOAC era collected during phase 1. Methods During phase 2, 15,641 consenting patients were enrolled (November 2011 to December 2014); 15,092 were eligible. This pre-specified cross-sectional analysis describes eligible patients\u2019 baseline characteristics. Atrial fibrillation disease characteristics, medical outcomes, and concomitant diseases and medications were collected. Data were analyzed using descriptive statistics. Results Of the total patients, 45.5% were female; median age was 71 (interquartile range: 64, 78) years. Patients were from Europe (47.1%), North America (22.5%), Asia (20.3%), Latin America (6.0%), and the Middle East/Africa (4.0%). Most had high stroke risk (CHA2DS2-VASc [Congestive heart failure, Hypertension, Age  6575 years, Diabetes mellitus, previous Stroke, Vascular disease, Age 65 to 74 years, Sex category] score  652; 86.1%); 13.9% had moderate risk (CHA2DS2-VASc = 1). Overall, 79.9% received oral anticoagulants, of whom 47.6% received NOAC and 32.3% vitamin K antagonists (VKA); 12.1% received antiplatelet agents; 7.8% received no antithrombotic treatment. For comparison, the proportion of phase 1 patients (of N = 1,063 all eligible) prescribed VKA was 32.8%, acetylsalicylic acid 41.7%, and no therapy 20.2%. In Europe in phase 2, treatment with NOAC was more common than VKA (52.3% and 37.8%, respectively); 6.0% of patients received antiplatelet treatment; and 3.8% received no antithrombotic treatment. In North America, 52.1%, 26.2%, and 14.0% of patients received NOAC, VKA, and antiplatelet drugs, respectively; 7.5% received no antithrombotic treatment. NOAC use was less common in Asia (27.7%), where 27.5% of patients received VKA, 25.0% antiplatelet drugs, and 19.8% no antithrombotic treatment. Conclusions The baseline data from GLORIA-AF phase 2 demonstrate that in newly diagnosed nonvalvular atrial fibrillation patients, NOAC have been highly adopted into practice, becoming more frequently prescribed than VKA in Europe and North America. Worldwide, however, a large proportion of patients remain undertreated, particularly in Asia and North America. (Global Registry on Long-Term Oral Antithrombotic Treatment in Patients With Atrial Fibrillation [GLORIA-AF]; NCT01468701

Optical properties of thin hexagonal boron nitride layers

Thin films of hexagonal boron nitride have been deposited at low temperature in a microwave plasma enhanced chemical vapor deposition reactor. They have been characterized by Infrared (FTIR) and micro-Raman spectroscopy (SMR). The films are optically anisotropic, and the IR measurements can be properly modelized when using an uniaxial model for the layers. This description is valid at the macroscopic scale, but gives only an averaged response of the polycrystalline nature of the films. Actually, they are constituted at the atomic scale by a collection of nanocrystallites with a preferred orientation around the normal of the layer. The size of the crystallites can be evaluated by micro-Raman measurements, when taking into account a confinement model. Some thermal annealing have been performed

Etude de l'implantation ionique a haute energie de bore et d'oxygene dans le silicium

SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : TD 80947 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Catalytic combustion of methane

Catalytic combustion is an environmentally benign technologywhich has recently reached the stage of commercialization.Palladium is the catalyst of choice when considering gasturbines fuelled with natural gas because of its superioractivity for methane oxidation. Several fundamental issues arestill open and their understanding would result in animprovement of the technology. Hence, the work presented inthis thesis aims at the identification of some of theparameters which govern the combustion activity ofpalladium-based catalysts. The first part of this work gives a background to catalyticcombustion and a brief comparison with other existingtechnologies. Paper I reviews some of the issues related tomaterial development and combustor design. The second part of this thesis consists of an experimentalinvestigation on palladium-based catalysts. The influence ofthe preparation method onthe properties of these catalystmaterials is investigated in Paper II. Paper III examines theactivity of the following catalysts: Pd/Al2O3, Pd/Ba-Al2O3 andPd/La-Al2O3. Specific attention is given to the metal-supportinteraction which strongly affects the combustion activity ofpalladium. The effect of doping of the support by addition ofcerium is reported in Paper IV. Finally, the deactivation of combustion catalysts isconsidered. The various deactivation processes which may affecthigh temperature combustion catalysts are reviewed in Paper V.Paper VI focuses on the poisoning of supported palladiumcatalysts by sulphur species. Palladium exhibits a higherresistance to sulphur poisoning than transition metals.Nevertheless, the nature of the support material plays animportant role and may entail a severe loss of activity whensulphur is present in the fuel-air mixture entering thecombustion chamber. Keywords: catalytic combustion, gas turbine, methane,palladium, alumina, barium, lanthanum, oxidation, preparation,temperature-programmed oxidation (TPO), decomposition,reoxidation, X-ray photoelectron spectroscopy (XPS),metal-support interaction, deactivation, sulphur, poisoning.The cover illustration is a TEM picture of a 100 nm palladiumparticle supported on aluminaNR 2014080

Bercy : empire ou constellation de principautés ?

The public image of the ministry of Economy and Finance is one of an unequivocal place, a sometimes besieged but most of the time conquering power fortress. The article analyses the mechanisms of this domination and its limits. On the one hand, it shows that the power of the ministry stems from its central role in the reorientation of many major public policies and, on the other, it stresses the importance of its organisational fragmentation between numerous historical directorates which tend to be autonomous and in charge of policies that are often competing and contradictory. However, these centrifugal tendencies are constrained by numerous initiatives pointing to integration and coordination, such as the strength of the networks and the ethos of the ministry, in addition to the permanent movement of absorption and fusion of organisations.Le ministère de l’Économie et des Finances a une image publique de lieu univoque, forteresse concentrant le pouvoir, parfois assiégée, le plus souvent conquérante. Cet article examine les ressorts de cette domination et ses limites. D’un côté, il montre que la puissance du ministère résulte de sa position centrale dans les réorientations de nombreuses politiques publiques majeures mais, de l’autre, il souligne aussi l’importance de sa fragmentation organisationnelle en de multiples grandes directions historiques, autonomes et chargées de politiques souvent concurrentes et contradictoires. À ces logiques centrifuges s’opposent cependant de multiples initiatives d’intégration et de coordination, comme la force des réseaux et de l’ethos du ministère mais aussi le mouvement permanent d’absorption et de fusion d’organisations

Determination of the optimal conditions for the deposition of Cadmium sulfide thin films by chemical bath deposition using Taguchi method

International audienceThin films of Cadmium sulfide (CdS) is one of the promising semiconductor materials which can be used as a tampon materials deposited by chemical bath deposition (CBD) in thin film solar cells thanks to its tunable direct band gap energy, large transmission coefficient and cost effective. The role of the CdS layer is still debated within the scientific community, but the material efficiency obtained with this fine n-type semiconductor layer is very high. It could protect the damage associated with the following spray deposits of defects in the surface of the absorber or adapt the width of the energy band gap between the absorber (∼1.2 (eV)) and the window layer (∼3.3 (eV)). The aim of this present study is to investigate the influence of deposition parameters of CdS thin films using the L9 orthogonal array of the Taguchi's design of experiments (DOE) elaborated by CBD method on ordinary glass substrate. The Taguchi design was used to evaluate the effects of four deposition parameters called factors namely the ratios [Cd]/[S], time of deposition, Ammonia concentration [NH4Cl] and volume ratio V(H2O)/V(NH3) on optical properties of elaborated films. The identification of the most influent factor of the deposition process on the band gap energy of elaborated films is also done by employing the analysis of variance (ANOVA). The Taguchi analysis employed in the present investigation led to optimize process parameters for the most optimal deposition conditions. Under the optimized configuration, the CdS films showed optimal gap energy of 2.42 (eV) [1]. The Taguchi analysis employed in the present investigation led to optimize process parameters for the most optimal deposition conditions. © 2015 IEEE