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Academic literature on the topic 'Dissémination des données'
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Journal articles on the topic "Dissémination des données"
Boutard, Guillaume, and Fabrice Marandola. "Méthode et application de la documentation des oeuvres mixtes en vue de leur préservation et de leur diffusion." Circuit 23, no. 2 (September 25, 2013): 37–47. http://dx.doi.org/10.7202/1018449ar.
Full textCaissie, Linda T., Claire Goggin, and Lisa A. Best. "Graphs, Tables, and Scientific Illustrations: Visualisation as the Science of Seeing Gerontology." Canadian Journal on Aging / La Revue canadienne du vieillissement 36, no. 4 (September 26, 2017): 536–48. http://dx.doi.org/10.1017/s0714980817000447.
Full textKhardi, Abdeslam, Abdelaziz Nogot, Mustapha Abdellaoui, and Fatima Jaiti. "Valorisation des sous-produits du palmier-dattier pour contribuer à la durabilité des oasis du Maroc." Cahiers Agricultures 33 (2024): 3. http://dx.doi.org/10.1051/cagri/2023027.
Full textDotché, Ignace Ogoudanan, Karamatou Bio Seydou, Amen Gloria Gwladys Ahouanse, Emmanuel Tohoun, Boris Constant Bankolé, and Issaka Youssao Abdou Karim. "Comment concevoir la biosécurité des élevages porcins des milieux lacustres du sud Bénin pour réduire le risque de maintien et de dissémination de la peste porcine africaine ?" Cahiers Agricultures 30 (2021): 32. http://dx.doi.org/10.1051/cagri/2021018.
Full textSilva, Gabriella Menezes Freitas, Gil Dutra Furtado, Bianca Miranda Amorim, José Andreey Almeida Teles, Marcos Antônio Jerônimo Costa, and Felipe Eduardo da Silva Sobral. "CONTROLE DE LA POPULATION DE CHIENS DANS LA MUNICIPALITE DE JOAO PESSOA (BRÉSIL) PENDANT LES QUATRE ANS DE 2015 A 2018." ENVIRONMENTAL SMOKE 2, no. 1 (May 7, 2019): 79. http://dx.doi.org/10.32435/envsmoke.20192179.
Full textLONGMENE FOPA, Arnaud. "LES CHINOIS EN AFRIQUE CENTRALE FRANCOPHONE : COMPRENDRE LES TRAJECTOIRES D’UNE PRÉSENCE ANCIENNE ET MULTIFORME." JOURNAL OF SINO-AFRICAN STUDIES 1, no. 1 (October 31, 2022): 67–84. http://dx.doi.org/10.56377/jsas.v1n1.6784.
Full textMekideche, Siham, Lila Brakchi-Ouakour, and Leila Kadik. "Impact des perturbations anthropiques sur la diversité végétale de la subéraie de Chréa, au nord de l’Algérie." BOIS & FORETS DES TROPIQUES 337 (November 26, 2018): 53. http://dx.doi.org/10.19182/bft2018.337.a31633.
Full textDiakaridia, Fofana, Beugré Jean-Michel-Vianney, Kouassi Moihet Samuel, Koné Salifou, Konan Kouassi Lambert, Ouattara Kassoum, Yapi Yapi Grégoire, et al. "Infestations des Gares Routières par les Punaises de Lit à Abidjan et Risque de Dissémination en Côte d’Ivoire." European Scientific Journal, ESJ 19, no. 36 (December 31, 2023): 227. http://dx.doi.org/10.19044/esj.2023.v19n36p227.
Full textCooren, François, John Durham Peters, Ben Peters, and Nicolas Bencherki. "Dialogue, dissémination et matérialisation : une entrevue avec John Durham Peters." Médiations et médiatisations, no. 4 (December 2, 2020): 110–20. http://dx.doi.org/10.52358/mm.vi4.142.
Full textKhazaal, Yasser, Stéphane Potvin, Antoine Pennou, William Djomo, François Borgeat, and Tania Lecomte. "Des repères pour la conception des apps ?" Santé mentale au Québec 46, no. 1 (September 21, 2021): 119–34. http://dx.doi.org/10.7202/1081512ar.
Full textDissertations / Theses on the topic "Dissémination des données"
Idir, Lilia. "Dissémination de données dans les réseaux véhiculaires." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCB157.
Full textThe number of vehicles on the roads in the world increased from 500 million in 1986 to 1 billion vehicles in 2010. Such a huge road network has brought some comfort to many drivers but on the other hand it represented around 1.24 million accidents in 2010. With the progress and development of wireless technologies these recent years, vehicular networks quickly evolved. Many car manufacturers and countries have built and imagined different applications in vehicular networks: road safety applications, others for traffic information, and entertainment applications. This last category of applications is distinguished from others by the quantity and volume of exchanged data, and represents a real problem due to the lossy nature of vehicular communications. In this thesis, we address the problem of data dissemination in distributed vehicular systems. Our main objective is to provide practical and workable solutions to disseminate data in realistic vehicular environments. The concept of data dissemination is large and significant. In this context, we call data dissemination each time there is a certain amount of data which must be distributed on in wireless network. The data is sent to multiple destinations who are interested to recover all or part of the information. As examples, we can consider the file sharing applications, streaming multimedia files and so on. We discuss in this thesis the data dissemination problem in vehicular networks, specifically the dissemination of large volumes of data such as content distribution. With the evolution in recent years of vehicular networks thanks to many car manufacturers support (eg Toyota, Nissan, BMW, Ford, etc.), the amount of exchanged data has increased exponentially over the years. Unfortunately, despite the advancement of wireless communications technologies, exchange large volumes of data in vehicular networks remains a challenge because of wireless communications features and those specific to vehicular networks
Idir, Lilia. "Dissémination de données dans les réseaux véhiculaires." Electronic Thesis or Diss., Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCB157.
Full textThe number of vehicles on the roads in the world increased from 500 million in 1986 to 1 billion vehicles in 2010. Such a huge road network has brought some comfort to many drivers but on the other hand it represented around 1.24 million accidents in 2010. With the progress and development of wireless technologies these recent years, vehicular networks quickly evolved. Many car manufacturers and countries have built and imagined different applications in vehicular networks: road safety applications, others for traffic information, and entertainment applications. This last category of applications is distinguished from others by the quantity and volume of exchanged data, and represents a real problem due to the lossy nature of vehicular communications. In this thesis, we address the problem of data dissemination in distributed vehicular systems. Our main objective is to provide practical and workable solutions to disseminate data in realistic vehicular environments. The concept of data dissemination is large and significant. In this context, we call data dissemination each time there is a certain amount of data which must be distributed on in wireless network. The data is sent to multiple destinations who are interested to recover all or part of the information. As examples, we can consider the file sharing applications, streaming multimedia files and so on. We discuss in this thesis the data dissemination problem in vehicular networks, specifically the dissemination of large volumes of data such as content distribution. With the evolution in recent years of vehicular networks thanks to many car manufacturers support (eg Toyota, Nissan, BMW, Ford, etc.), the amount of exchanged data has increased exponentially over the years. Unfortunately, despite the advancement of wireless communications technologies, exchange large volumes of data in vehicular networks remains a challenge because of wireless communications features and those specific to vehicular networks
Trouessin, Gilles. "Traitements fiables de données confidentielles par fragmentation-redondance-dissémination." Toulouse 3, 1991. http://www.theses.fr/1991TOU30260.
Full textAllani, Sabri. "Agrégation et dissémination de données dans un réseau véhiculaire VANET." Thesis, Pau, 2018. http://www.theses.fr/2018PAUU3013/document.
Full textSince the last decade, the emergence of affordable wireless devices in vehicle ad-hoc networks has been a key step towards improving road safety as well as transport efficiency. Informing vehicles about interesting safety and non-safety events is of key interest. Thus, the design of an efficient data dissemination protocol has been of paramount importance. A careful scrutiny of the pioneering vehicle-to-vehicle data dissemination approaches highlights that geocasting is the most feasible approach for VANET applications, more especially in safety applications, since safety events are of interest mainly to vehicles located within a specific area, commonly called ZOR or Zone Of Relevance, close to the event. Indeed, the most challenging issue in geocast protocols is the definition of the ZOR for a given event dissemination. In this thesis, our first contribution introduces a new geocast approach, called Data Dissemination Protocol based on Map Splitting(DPMS). The main thrust of DPMS consists of building the zones of relevance through the mining of correlations between vehicles’ trajectories and crossed regions. To do so, we rely on the Formal Concept Analysis (FCA), which is a method of extracting interesting clusters from relational data. The performed experiments show that DPMS outperforms its competitors in terms of effectiveness and efficiency. In another hand, some VANET applications, e.g., Traffic Information System (TIS), require data aggregation in order to inform vehicles about road traffic conditions, which leads to reduce traffic jams and consequently CO2 emission while increasing the user comfort. Therefore, the design of an efficient aggregation protocol that combines correlated traffic information like location, speed and direction known as Floating Car Data (FCD) is a challenging issue. In this thesis, we introduce a new TIS data aggregation protocol called Smart Directional Data Aggregation (SDDA) able to decrease the network overload while obtaining high accurate information on traffic conditions for large road sections. To this end, we introduce three levels of messages filtering: (i) filtering all FCD messages before the aggregation process based on vehicle directions and road speed limitations, (ii) integrating a suppression technique in the phase of information gathering in order to eliminate the duplicate data, and (iii) aggregating the filtered FCD data and then disseminating it to other vehicles. The performed experiments show that the SDDA outperforms existing approaches in terms of effectiveness and efficiency
Antoine, Maeva. "Amélioration de la dissémination de données biaisées dans les réseaux structurés." Thesis, Nice, 2015. http://www.theses.fr/2015NICE4054/document.
Full textMany distributed systems face the problem of load imbalance between machines. With the advent of Big Data, large datasets whose values are often highly skewed are produced by heterogeneous sources to be often processed in real time. Thus, it is necessary to be able to adapt to the variations of size/content/source of the incoming data. In this thesis, we focus on RDF data, a format of the Semantic Web. We propose a novel approach to improve data distribution, based on the use of several order-preserving hash functions. This allows an overloaded peer to independently modify its hash function in order to reduce the interval of values it is responsible for. More generally, to address the load imbalance issue, there exist almost as many load balancing strategies as there are different systems. We show that many load balancing schemes are comprised of the same basic elements, and only the implementation and interconnection of these elements vary. Based on this observation, we describe the concepts behind the building of a common API to implement any load balancing strategy independently from the rest of the code. Implemented on our distributed storage system, the API has a minimal impact on the business code and allows the developer to change only a part of a strategy without modifying the other components. We also show how modifying some parameters can lead to significant improvements in terms of results
Haddadou, Nadia. "Réseaux ad hoc véhiculaires : vers une dissémination de données efficace, coopérative et fiable." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1023/document.
Full textVehicular Ad Hoc Networks (VANETs) allow sharing different kinds of data between vehicles in a collaborative way. In this thesis, we are particularly interested in road safety applications, designed for the exchange of information on road traffic and conditions. This kind of applications have strict Quality of Service (QoS) requirements, as data must be routed thoroughly and without any delays so for assuring the timely delivery of useful information to the drivers. In this context, data routing must face several issues raised by the high mobility and dispersion of vehicles, inadequate or completely lacking infrastructure, a variable network density, network saturation due to the large of information to deliver, and the size of the geographical areas to cover. Indeed, the problem of data dissemination in VANETs is non-trivial, and several research challenges must be solved in order to provide an efficient, collaborative, and reliable support for road safety applications. Specifically, we will address the problem of collaborative data dissemination through the following three questions: “How to perform data dissemination?”, “When should we do it?”, and “What must be disseminated?” We have provided answers to these questions through the three contributions of this thesis. Our first contribution is an efficient dissemination strategy, specifically tailored to the importance of the exchanged information as well as its lifespan, which is able to avoid the intensive dissemination process that generates network congestion and data redundancy. We confirm our statements and validate the performance of our solution by modeling it using a discrete-time Markov chain, which demonstrates the number of necessary retransmissions for all concerned vehicles to receive information. Moreover, we performed extensive simulations that show a reduction of up to 90% of redundant messages with respect to message flooding dissemination strategies. Next, in order to further improve the road safety message dissemination process, we propose a communications channel access scheduler, which aims at reducing the number of collisions caused by IEEE 802.11p/1609.4 multi-channel synchronizations, and thus improving the data reception rate. We base our solution on the optimal stopping theory, which chooses the right moment to send information by balancing the channel occupancy rate, the data delivery efficiency, and the maximum deferment delay tolerated by the information. To this end, we formulate the optimal stopping theory through a Markov decision process (MDP). We show through simulation-based evaluations an improvement of the reception rate of up to 25% and a reduction of up to 47% of message losses. Finally, after being interested in the quantitative aspect of network performance, we centered our efforts on improving the reliability of the dissemination process, which is obtained by motivating vehicles to cooperate and evicting malicious vehicles from the process. To this end, we propose a trust model inspired on signaling games, which are a type of dynamic Bayesian games. Through the use of our model, equilibrium is achieved, thus resulting in a fast and low-cost vehicle self-selection process. We define the parameters of our trust model through a discrete-time Markov chain model. To the best of our knowledge, our solution is the only existing solution that tackles the negative effects introduced by the presence of both malicious and selfish vehicles in a VANET. We evaluated the performance of our solution by modeling it using a Markov chain, and a set of simulations. Our results show that up to 100% of malicious vehicles are evicted while keeping a high cooperation rate, thus achieving an improvement of 42% when compared to other similar solutions
Hamidouche, Lyes. "Vers une dissémination efficace de données volumineuses sur des réseaux wi-fi denses." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS188/document.
Full textWe are witnessing a proliferation of mobile technologies and an increasing volume of data used by mobile applications. Devices consume thus more and more bandwidth. In this thesis, we focus on dense Wi-Fi networks during large-scale events (such as conferences). In this context, the bandwidth consumption and the interferences caused by the parallel downloads of a large volume of data by several mobile devices that are connected to the same Wi-Fi network degrade the performance of the dissemination. Device-to-Device (D2D) communication technologies such as Bluetooth or Wi-Fi Direct can be used in order to improve network performance to deliver better QoE to users. In this thesis we propose two approaches for improving the performance of data dissemination. The first approach, more suited to a dynamic configuration, is to use point-to-point D2D connections on a flat topology for data exchange. Our evaluations show that our approach can reduce dissemination times by up to 60% compared to using Wi-Fi alone. In addition, we ensure a fair distribution of the energy load on the devices to preserve the weakest batteries in the network. We have observed that by taking into account the battery life and the bandwidth of mobile devices, the solicitation of the weakest batteries can be reduced significantly. The second approach, more adapted to static configurations, consists in setting up hierarchical topologies by gathering mobile devices in small clusters. In each cluster, a device is chosen to relay the data that it receives from the server and forwards it to its neighbors. This approach helps to manage interference more efficiently by adjusting the signal strength in order to limit cluster reach. In this case, we observed up to 30% gains in dissemination time. In the continuity of this thesis work, we discuss three perspectives which would be interesting to be undertaken, in particular the automatic adaptation of the dissemination to the state of the network and the simultaneous use of both topology types, flat and hierarchical
Hamidouche, Lyes. "Vers une dissémination efficace de données volumineuses sur des réseaux wi-fi denses." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS188.
Full textWe are witnessing a proliferation of mobile technologies and an increasing volume of data used by mobile applications. Devices consume thus more and more bandwidth. In this thesis, we focus on dense Wi-Fi networks during large-scale events (such as conferences). In this context, the bandwidth consumption and the interferences caused by the parallel downloads of a large volume of data by several mobile devices that are connected to the same Wi-Fi network degrade the performance of the dissemination. Device-to-Device (D2D) communication technologies such as Bluetooth or Wi-Fi Direct can be used in order to improve network performance to deliver better QoE to users. In this thesis we propose two approaches for improving the performance of data dissemination. The first approach, more suited to a dynamic configuration, is to use point-to-point D2D connections on a flat topology for data exchange. Our evaluations show that our approach can reduce dissemination times by up to 60% compared to using Wi-Fi alone. In addition, we ensure a fair distribution of the energy load on the devices to preserve the weakest batteries in the network. We have observed that by taking into account the battery life and the bandwidth of mobile devices, the solicitation of the weakest batteries can be reduced significantly. The second approach, more adapted to static configurations, consists in setting up hierarchical topologies by gathering mobile devices in small clusters. In each cluster, a device is chosen to relay the data that it receives from the server and forwards it to its neighbors. This approach helps to manage interference more efficiently by adjusting the signal strength in order to limit cluster reach. In this case, we observed up to 30% gains in dissemination time. In the continuity of this thesis work, we discuss three perspectives which would be interesting to be undertaken, in particular the automatic adaptation of the dissemination to the state of the network and the simultaneous use of both topology types, flat and hierarchical
Kubler, Sylvain. "Premiers travaux relatifs au concept de matière communicante : Processus de dissémination des informations relatives au produit." Electronic Thesis or Diss., Université de Lorraine, 2012. http://www.theses.fr/2012LORR0130.
Full textOver the last decade, communities involved with intelligent-manufacturing systems (IMS - Intelligent Manufacturing Systems, HMS - Holonic Manufacturing System) have demonstrated that systems that integrate intelligent products can be more efficient, flexible and adaptable. Intelligent products may prove to be beneficial economically, to deal with product traceability and information sharing along the product lifecycle. Nevertheless, there are still some open questions such as the specification of what information should be gathered, stored and distributed and how it should be managed during the lifecycle of the product. The contribution of this thesis is to define a process for disseminating information related to the product over its lifecycle. This process is combined with a new paradigm, which changes drastically the way we view the material. This concept aims to give the ability for the material to be intrinsically and wholly "communicating". The data dissemination process allow users to store context-sensitive information on communicating product. In addition to the data dissemination process, this thesis gives insight into the technological and scientific research fields inherent to the concept of "communicating material", which remain to be explored
Kubler, Sylvain. "Premiers travaux relatifs au concept de matière communicante : Processus de dissémination des informations relatives au produit." Phd thesis, Université Henri Poincaré - Nancy I, 2012. http://tel.archives-ouvertes.fr/tel-00759600.
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