Les patients adressés par un médecin généraliste aux urgences sont-ils plus hospitalisés que les autres ?

INTRODUCTION : Ces dernières années, le système de santé en France est confronté à une pression croissante en raison de différents facteurs tels que le vieillissement de la population, la pénurie de professionnel de santé et la demande croissante au niveau médical. Les établissements de soins d'urgence sont particulièrement touchés par cette demande croissante de soin entraînant de longs délais d'attente pour les patients nécessitant des soins médicaux. Cette étude s'attachera à comparer le taux d’hospitalisation des patients adressés aux urgences adultes du CHRU de Besançon par un médecin généraliste par rapport à ceux qui se présentent eux-mêmes

Protocole de routage géo-multipoint hybride et mécanisme d'acheminement de données pour les réseaux ad hoc de véhicules (VANETs)

Infotainment applications for bulk data transfer (e.g. multimedia file, multiplayer game, etc.) are recently proposed for vehicular ad hoc networks (VANED. One of the main challenges in these applications is to guarantee a Quality of Service (QoS) in terms of successful data delivery; this needs a reliable communication path between the source/destination nodes. However, in a dynamic environment such a V ANET, ensuring a reliable communication between the nodes becomes a complex task because of the high mobility of the nodes. In this thesis, the study is focused on the impact of the mobility on the bulk data transfer in Infotainment applications. In this context, we have proposed a novel geo-multicast hybrid routing protocol, named DG-CastoR that works as follows: for each disseminated query, it proposes a mechanism to construct an overlay network. This overlay gathers a set of nodes able to communicate directly with the source node in a near future. To find out the suitable nodes, we introduced a novel nearest neighbor method, named TQ (Trajectory Queries). Based on the spatiotemporal similarity measures applied on the nodes future trajectories, a set of nodes is returned. Thus, the query is disseminated only to the nodes that belong to the overlay network. In a second part of the thesis, we have proposed a data management application, named CoFFee. It improves the data delivery when the data transfer lime exceeds the connectivity duration with the source node. Hence, CoFFee introduces two techniques: (1) data pruning and (2) data replication techniques. The last part of the thesis is reserved for the experimentations and the performance evaluation of our approaches.Les réseaux ad hoc de véhicules (VANET) sont des réseaux sans infrastructure fixe composés des nœuds mobiles communiquant entre eux à travers une communication radio. Récemment, des applications multimédias ont été conçues pour les VANETs. Elles visent à partager des données multimédias entre les véhicules. Cependant en raison de la forte mobilité des véhicules, le transfert de données multimédias sur les chemins de communication offre un risque d'être interrompu. Dans cette thèse, nous nous intéressons à l'étude de l'impact de la mobilité sur les applications de transfert de données volumineuses. Nous proposons un protocole de routage géo-multipoint hybride, appelé DG-CastoR. Pour chaque requête disséminée, Il propose un mécanisme de construction implicite d'un overlay (colonie). Les nœuds candidats pour adhérer à la colonie, sont sélectionnés selon leur trajectoire future. Dans ce contexte, nous proposons une nouvelle méthode de recherche de voisinages proches appelée TQ. Grâce aux mesures de similarité spatio-temporelle des trajectoires, TQ sélectionne parmi les véhicules du réseau, ceux capables de .garantir une durée de connectivité compatible avec les contraintes de l'application. La seconde fonctionnalité de DG-CastoR concerne la dissémination multipoint de la requête vers les nœuds appartenant à la colonie construite. Dans la deuxième partie de notre travail, nous proposons une application de gestion de données conçue spécialement pour les réseaux ad hoc mobiles, appelée : CoFFee. Grâce aux services de gestion de données, CoFFee améliore le transfert des données. Nous avons évalué nos contributions par des séries d'expérimentations

DG-CastoR : Direction-based Geocast Routing protocol for VANET

International audienceVehicular Ad hoc NETworks are currently attracting the attention of researchers and automobile manufacturers. There are some interesting applications for VANETs such as intelligent transportation systems for safety and comfort driving and Infotainment applications for data exchange between mobile vehicles. Disseminating and routing messages in such environments present big challenges due to the very high mobility and the frequent changes of network topology. In this paper, a novel geocast routing protocol is proposed, named DG-CastoR protocol and especially tailored for infotainment applications in VANETs. It is based on the future locations prediction of the neighbors to deliver the query packet in geocast manner to corresponding nodes. Simulation results show that, compared to multicast protocols, DG-CastoR is a robust protocol for handling a large number of nodes in VANETs. It also reduces the traffic load and the energy consumption of the devices by avoiding the unnecessary packet flooding over the network

DG-CastoR for query packets dissemination in VANET

International audienceVehicular Ad hoc NETworks are currently attracting theattention of researchers and automobile manufacturers.Disseminating and routing messages in such environmentspresent big challenges due to the very high mobility and thefrequent changes of network topology. In this paper, a novelgeocast routing protocol is proposed, named DG-CastoRprotocol and especially tailored for Infotainmentapplications in VANETs. It aims to build a virtual communitybased on future locations prediction of the mobile nodes inthe network. We call this community a Rendez-vous groupwhere the nodes may meet in the near future. However, thequery is only disseminated between the nodes belonging tothe same Rendez-Vous group.Simulation results show that, compared to multicastprotocols, DG-CastoR is a robust in managing a largenumber of nodes in VANETs. It also reduces the traffic loadby avoiding the unnecessary packet flooding all over thenetwork

Protocole de routage géo-multipoint hybride et mécanisme d'acheminement de données pour les réseaux ad hoc de véhicules (VANETs)

Les réseaux ad hoc de véhicules (VANET) sont des réseaux sans infrastructure fixe composés des nœuds mobiles communiquant entre eux à travers une communication radio. Récemment, des applications multimédias ont été conçues pour les VANETs. Elles visent à partager des données multimédias entre les véhicules. Cependant en raison de la forte mobilité des véhicules, le transfert de données multimédias sur les chemins de communication offre un risque d'être interrompu. Dans cette thèse, nous nous intéressons à l'étude de l'impact de la mobilité sur les applications de transfert de données volumineuses. Nous proposons un protocole de routage géo-multipoint hybride, appelé DG-CastoR. Pour chaque requête disséminée, Il propose un mécanisme de construction implicite d'un overlay (colonie). Les nœuds candidats pour adhérer à la colonie, sont sélectionnés selon leur trajectoire future. Dans ce contexte, nous proposons une nouvelle méthode de recherche de voisinages proches appelée TQ. Grâce aux mesures de similarité spatio-temporelle des trajectoires, TQ sélectionne parmi les véhicules du réseau, ceux capables de .garantir une durée de connectivité compatible avec les contraintes de l'application. La seconde fonctionnalité de DG-CastoR concerne la dissémination multipoint de la requête vers les nœuds appartenant à la colonie construite. Dans la deuxième partie de notre travail, nous proposons une application de gestion de données conçue spécialement pour les réseaux ad hoc mobiles, appelée : CoFFee. Grâce aux services de gestion de données, CoFFee améliore le transfert des données. Nous avons évalué nos contributions par des séries d'expérimentations.Infotainment applications for bulk data transfer (e.g. multimedia file, multiplayer game, etc.) are recently proposed for vehicular ad hoc networks (VANED. One of the main challenges in these applications is to guarantee a Quality of Service (QoS) in terms of successful data delivery; this needs a reliable communication path between the source/destination nodes. However, in a dynamic environment such a V ANET, ensuring a reliable communication between the nodes becomes a complex task because of the high mobility of the nodes. In this thesis, the study is focused on the impact of the mobility on the bulk data transfer in Infotainment applications. In this context, we have proposed a novel geo-multicast hybrid routing protocol, named DG-CastoR that works as follows: for each disseminated query, it proposes a mechanism to construct an overlay network. This overlay gathers a set of nodes able to communicate directly with the source node in a near future. To find out the suitable nodes, we introduced a novel nearest neighbor method, named TQ (Trajectory Queries). Based on the spatiotemporal similarity measures applied on the nodes future trajectories, a set of nodes is returned. Thus, the query is disseminated only to the nodes that belong to the overlay network. In a second part of the thesis, we have proposed a data management application, named CoFFee. It improves the data delivery when the data transfer lime exceeds the connectivity duration with the source node. Hence, CoFFee introduces two techniques: (1) data pruning and (2) data replication techniques. The last part of the thesis is reserved for the experimentations and the performance evaluation of our approaches.VILLEURBANNE-DOC'INSA LYON (692662301) / SudocSudocFranceF

DG-CastoR : Direction-based Geocast Routing protocol for VANET

International audienceVehicular Ad hoc NETworks are currently attracting the attention of researchers and automobile manufacturers. There are some interesting applications for VANETs such as intelligent transportation systems for safety and comfort driving and Infotainment applications for data exchange between mobile vehicles. Disseminating and routing messages in such environments present big challenges due to the very high mobility and the frequent changes of network topology. In this paper, a novel geocast routing protocol is proposed, named DG-CastoR protocol and especially tailored for infotainment applications in VANETs. It is based on the future locations prediction of the neighbors to deliver the query packet in geocast manner to corresponding nodes. Simulation results show that, compared to multicast protocols, DG-CastoR is a robust protocol for handling a large number of nodes in VANETs. It also reduces the traffic load and the energy consumption of the devices by avoiding the unnecessary packet flooding over the network

Combining Reduction and Dense Blocks for Music Genre Classification

International audienceEmbedding music genre classifiers in music recommendation systems offers a satisfying user experience. It predicts music tracks depending on the user’s taste in music. In this paper, we propose a preprocessing approach for generating STFT spectrograms and upgrades to a CNN-based music classifier named Bottom-up Broadcast Neural Network (BBNN). These upgrades concern the expansion of the number of inception and dense blocks, as well as the enhancement of the inception block through reduction block implementation. The proposed approach is able to outperform state-of-the-art music genre classifiers in terms of accuracy scores. It achieves an accuracy of 97.51% and 74.39% over the GTZAN and the FMA dataset respectively

Phosphotungstic Acid: An Efficient, Cost-effective and Recyclable Catalyst for the Synthesis of Polysubstituted Quinolines

Phosphotungstic acid (H3PW12O40) was used as an efficient and recyclable catalyst for the synthesis of polysubstituted quinolines through the Friedländer condensation of 2-aminoarylketone with carbonyl compounds, which was achieved by conventional heating under solvent-free conditions

CoFFee: Cooperative and InFrastructure-Free Peer-To-Peer System for VANET

International audiencenter vehicle communication in ad hoc networks becomes the scope of research of the last few years. In this paper, we present CoFFee, Cooperative and Infrastructure-Free peer-to-peer system that aims to exchange multimedia files between mobile vehicles in VANET. The cooperative behavior of the nodes during the file sharing process is the main contribution of CoFFee. We tested and evaluated our approach in Omnet++ simulation environment. The first simulation results when applying our content distribution algorithm are very promising