Fictitious Domain Method for Unsteady Problems: Application to Electromagnetic Scattering

In this work, we present and implement a fictitious domain method for time dependent problems of scattering by obstacles. We focus our attention on the case of 2D electromagnetic waves and perfectly conducting boundaries. Such a method allows us to work with uniform meshes for the electric field, independently of the geometry of the obstacle, the boundary condition being taken into account via the introduction of a Lagrange multiplier that can be interpreted as a surface current. After a brief description of the method and a presentation of its main properties, we show the superiority in terms of accuracy of this new method over the method that consists in using a staircase like approximation of the boundary

Cyber Security of the Railway wireless system: detection, decision and Human-in-the-Loop

TRA 2018, 7th Transport Research Arena, Vienne, AUTRICHE, 16-/04/2018 - 19/04/2018The networks used in the Railway domain are usually heterogeneous, not enough protected and not fitted to the usual Cyber Security requirements in terms of sustainability, protection and attack detection. Furthermore, the quick evolution of the telecommunication means, the threats and the sustainability aspects have to be taken into account in order to protect the Railway system. The paper presents the first contributions on Cyber Security for railways that can be divided into three main aspects dealing with the Cyber Security of the wireless part of the railway communication system: detection, decision and Human-in-the-Loop. Part of the work will be devoted to the development of an Open Pluggable Framework (OPF). The OPF is a software framework based on automation principles. It monitors the environment, then some algorithms detect abnormal behaviours, and next, OPF decides which reaction to take and finally apply this action (e.g. an alarm or a reconfiguration). The last part 'human in the loop' aims at answering the questions: what happens if the automatic countermeasures fail and how the driver can cope with the attack consequences. It consists in placing professional drivers and Central Traffic Control operators in a realistic simulator and playing scenarios involving attacks and observing the reactions of the professional drivers. A preliminary methodology is proposed and discussed through a concrete case study

Application d'une méthodologie d'aide à la décision multicritère dans le cadre du contrôle du trafic aérien, coopération sur plusieurs secteurs

International audienceCet article présente l'application de la Méthodologie MultiCritère d'Aide à la Décision (MMCAD) dans le domaine du contrôle du trafic aérien. Cette MMCAD a tout d'abord pour objectif de comprendre la démarche des contrôleurs aériens dans leurs tâches de détection et de résolution de conflits, dans leur secteur de contrôle, et aussi en coopération avec les secteurs adjacents. Suite à cette analyse, les outils d'aide au contrôle du trafic aérien présents dans la plateforme AMANDA (Automation & MAN-machine Delegation of Action), pourront être étendus pour une utilisation sur les secteurs adjacents, AMANDA ne gérant actuellement qu'un seul secteur de contrôle. Mots clés-contrôle aérien, analyse multicritère, aide à la décision, coopération homme machine, MMCAD, espace de travail commun, AMANDA

Unraveling the performance of dispersion-corrected functionals for the accurate description of weakly bound natural polyphenols

Long-range non-covalent interactions play a key role in the chemistry of natural polyphenols. We have previously proposed a description of supramolecular polyphenol complexes by the B3P86 density functional coupled with some corrections for dispersion. We couple here the B3P86 functional with the D3 correction for dispersion, assessing systematically the accuracy of the new B3P86-D3 model using for that the well-known S66, HB23, NCCE31, and S12L datasets for non-covalent interactions. Furthermore, the association energies of these complexes were carefully compared to those obtained by other dispersion-corrected functionals, such as B(3)LYP-D3, BP86-D3 or B3P86-NL. Finally, this set of models were also applied to a database composed of seven non-covalent polyphenol complexes of the most interest.FDM acknowledges financial support from the Swedish Research Council (Grant No. 621-2014-4646) and SNIC (Swedish National Infrastructure for Computing) for providing computer resources. The work in Limoges (IB and PT) is supported by the “Conseil Régional du Limousin”. PT gratefully acknowledges the support by the Operational Program Research and Development Fund (project CZ.1.05/2.1.00/03.0058 of the Ministry of Education, Youth and Sports of the Czech Republic). IB gratefully acknowledges financial support from “Association Djerbienne en France”

Oxia Planum: The Landing Site for the ExoMars “Rosalind Franklin” Rover Mission: Geological Context and Prelanding Interpretation

The European Space Agency (ESA) and Roscosmos ExoMars mission will launch the “Rosalind Franklin” rover in 2022 for a landing on Mars in 2023.The goals of the mission are to search for signs of past and present life on Mars, investigate the water/geochemical environment as a function of depth in the shallow subsurface, and characterize the surface environment. To meet these scientific objectives while minimizing the risk for landing, a 5-year-long landing site selection process was conducted by ESA, during which eight candidate sites were down selected to one: Oxia Planum. Oxia Planum is a 200 km-wide low-relief terrain characterized by hydrous clay-bearing bedrock units located at the southwest margin of Arabia Terra. This region exhibits Noachian-aged terrains. We show in this study that the selected landing site has recorded at least two distinct aqueous environments, both of which occurred during the Noachian: (1) a first phase that led to the deposition and alteration of ∼100 m of layered clay-rich deposits and (2) a second phase of a fluviodeltaic system that postdates the widespread clay-rich layered unit. Rounded isolated buttes that overlie the clay-bearing unit may also be related to aqueous processes. Our study also details the formation of an unaltered mafic-rich dark resistant unit likely of Amazonian age that caps the other units and possibly originated from volcanism. Oxia Planum shows evidence for intense erosion from morphology (inverted features) and crater statistics. Due to these erosional processes, two types of Noachian sedimentary rocks are currently exposed. We also expect rocks at the surface to have been exposed to cosmic bombardment only recently, minimizing organic matter damage

ARIA 2016 : Care pathways implementing emerging technologies for predictive medicine in rhinitis and asthma across the life cycle

The Allergic Rhinitis and its Impact on Asthma (ARIA) initiative commenced during a World Health Organization workshop in 1999. The initial goals were (1) to propose a new allergic rhinitis classification, (2) to promote the concept of multi-morbidity in asthma and rhinitis and (3) to develop guidelines with all stakeholders that could be used globally for all countries and populations. ARIA-disseminated and implemented in over 70 countries globally-is now focusing on the implementation of emerging technologies for individualized and predictive medicine. MASK [MACVIA (Contre les Maladies Chroniques pour un Vieillissement Actif)-ARIA Sentinel NetworK] uses mobile technology to develop care pathways for the management of rhinitis and asthma by a multi-disciplinary group and by patients themselves. An app (Android and iOS) is available in 20 countries and 15 languages. It uses a visual analogue scale to assess symptom control and work productivity as well as a clinical decision support system. It is associated with an inter-operable tablet for physicians and other health care professionals. The scaling up strategy uses the recommendations of the European Innovation Partnership on Active and Healthy Ageing. The aim of the novel ARIA approach is to provide an active and healthy life to rhinitis sufferers, whatever their age, sex or socio-economic status, in order to reduce health and social inequalities incurred by the disease.Peer reviewe

Lutte integree de nouveaux auxiliaires tres suivis

National audienc

Démarches ergonomiques d'évaluation et de conception d'interfaces graphiques homme-machine à l'aide de techniques d'intelligence artificielle: évolutions vis-à-vis de l'ergonomie

International audienceL'objectif de cet article est de présenter de nouvelles démarches ergonomiques d'évaluation et de conception d'interfaces graphiques homme-machine à l'aide de techniques d'Intelligence Artificielle. Ainsi, après avoir étudié les outils informatiques actuels permettant la réalisation d'interfaces, nous présentons le système expert SYNOP d'aide à l'évaluation ergonomique de vues graphiques, ainsi que les utilisations possibles d'un tel outil

CONTRIBUTION A LA MODELISATION POUR LE DIAGNOSTIC DES SYSTEMES COMPLEXES (APPLICATION A LA SIGNALISATION DES LIGNES A GRANDE VITESSE)

VALENCIENNES-BU Sciences Lettres (596062101) / SudocNANCY-INRIA Lorraine LORIA (545472304) / SudocSudocFranceF

COOPERATION HOMME-MACHINE POUR LE DIAGNOSTIC TECHNIQUE (APPLICATION AUX DERANGEMENTS TELEPHONIQUES)

L'AUTOMATISATION EST DE PLUS EN PLUS PRESENTE DANS LES ACTIVITES COGNITIVES HUMAINES. L'AUTOMATIQUE HUMAINE SE PROPOSE D'ETUDIER LA COORDINATION DES PRISES DE DECISION D'OPERATEURS HUMAINS ET DE CALCULATEURS, ELLE VISE A MIEUX APPREHENDER LES RISQUES DE CES PRISES DE DECISION. LES INTERFERENCES NEGATIVES QUI PEUVENT APPARAITRE ENTRE LE RAISONNEMENT DE L'HOMME ET CELUI DE LA MACHINE, PEUVENT COMPROMETTRE LA REALISATION DE L'ACTIVITE. POUR EMPECHER L'APPARITION DE CONFLITS OU EN LIMITER LES CONSEQUENCES, LA CONNAISSANCE DES MECANISMES DE RAISONNEMENT HUMAIN ET AUTOMATISE AINSI QUE LA MISE EN PLACE D'UNE COOPERATION SONT NECESSAIRES. CE MEMOIRE PROPOSE UNE DEMARCHE DE DECOMPOSITION DE L'ACTIVITE PERMETTANT DE SPECIFIER LA COOPERATION A METTRE EN PLACE. NOUS ILLUSTRONS NOTRE DEMARCHE DANS LE CAS OU LA PRISE DE DECISION EST LIEE AU DIAGNOSTIC ET QU'ELLE DOIT ETRE REALISEE PAR UN HOMME ET UNE MACHINE. NOUS INTRODUISONS LA NOTION D'ESPACE COMMUN DE TRAVAIL POUR LES ECHANGES D'INFORMATIONS ENTRE L'HOMME ET LA MACHINE PENDANT LE RAISONNEMENT. POUR IMPLEMENTER L'ESPACE COMMUN DE TRAVAIL EN MACHINE, NOUS DEFINISSONS DES PROPRIETES ET DES MECANISMES QUI ASSURENT LES ECHANGES. LA NOTION DE POINTS DE VUE SUR LA CONNAISSANCE COMMUNE A L'HOMME ET A LA MACHINE EST INTRODUITE, ELLE PERMET DE REDUIRE LES PROBLEMES DE COORDINATION DES RAISONNEMENTS. NOUS DETAILLONS ENSUITE L'APPLICATION NOTRE PROPOSITION AU DIAGNOSTIC DES DERANGEMENTS TELEPHONIQUES CHEZ FRANCE TELECOM. LA MISE EN UVRE DU PRINCIPE PROPOSE DANS UN CAS REEL MONTRE L'APPLICABILITE DE LA DEMARCHE ET L'INTERET DE LA COOPERATION. LES BONNES PERFORMANCES OBTENUES PERMETTENT D'ENVISAGER DES AMELIORATIONS POUR LE DIAGNOSTIC ET DES EXTENSIONS DE LA COOPERATION A D'AUTRES ACTIVITES COGNITIVES OU L'HOMME ET LA MACHINE SONT AMENES A INTERVENIR.VALENCIENNES-BU Sciences Lettres (596062101) / SudocSudocFranceF