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7 results on '"Université de la Manouba - UMA (TUNISIA)"'

1. PREDICAT: A Semantic Service-Oriented Platform for Data Interoperability and Linking in Earth Observation and Disaster Prediction

Author

Bernard Archimède, Hela Taktak, Hajer Baazaoui Zghal, Sana Ben Abdallah Ben Lamine, Chirine Ghedira Guegan, Khouloud Boukadi, Maroua Masmoudi, Mohamed Hedi Karray, Michael Mrissa, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université de la Manouba - UMA (TUNISIA), InnoRenew CoE (SLOVENIA), Université de Lyon - UDL (FRANCE), Université Jean Moulin Lyon 3 (FRANCE), Université de Sfax (TUNISIA), Laboratoire d'InfoRmatique en Image et Systèmes d'information - LIRIS (Villeurbanne, France), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Multimedia, InfoRmation systems and Advanced Computing Laboratory (MIRACL), Faculté des Sciences Economiques et de Gestion de Sfax (FSEG Sfax), Université de Sfax - University of Sfax-Université de Sfax - University of Sfax, Service Oriented Computing (SOC), Laboratoire d'InfoRmatique en Image et Systèmes d'information (LIRIS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École Centrale de Lyon (ECL), Université de Lyon-Université Lumière - Lyon 2 (UL2)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Université Lumière - Lyon 2 (UL2), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de recherche en Génie Logiciel, Applications distribuées, Systèmes décisionnels et Imagerie intelligente [Manouba] (RIADI), École Nationale des Sciences de l'Informatique [Manouba] (ENSI), Université de la Manouba [Tunisie] (UMA)-Université de la Manouba [Tunisie] (UMA), Laboratoire Génie de Production (LGP), Ecole Nationale d'Ingénieurs de Tarbes, and InnoRenew CoE

Subjects
[SPI.OTHER]Engineering Sciences [physics]/Other, Earth observation, Computer science, [SDE.MCG]Environmental Sciences/Global Changes, Ocean temperature, Big data, Interoperability, 0211 other engineering and technologies, Services computing, 02 engineering and technology, Ontology (information science), computer.software_genre, Meteorology, Autre, 0202 electrical engineering, electronic engineering, information engineering, Milieux et Changements globaux, 021101 geological & geomatics engineering, business.industry, Earth, Data science, Semantics, Data access, Data integration, 020201 artificial intelligence & image processing, Web service, business, computer
Abstract

International audience; The increasing volume of data generated by earth observation programs such as Copernicus, NOAA, and NASA Earth Data, is overwhelming. Although these programs are very costly, data usage remains limited due to lack of interoperability and data linking. In fact, multi-source and heterogeneous data exploitation could be significantly improved in different domains especially in the natural disaster prediction one. To deal with this issue, we introduce the PREDICAT project that aims at providing a semantic service-oriented platform to PREDIct natural CATastrophes. The PREDICAT platform considers (1) data access based on web service technology; (2) ontology-based interoperability for the environmental monitoring domain; (3) data integration and linking via big data techniques; (4) a prediction approach based on semantic machine learning mechanisms. The focus in this paper is to provide an overview of the PREDICAT platform architecture. A scenario explaining the operation of the platform is presented based on data provided by our collaborators, including the international intergovernmental Sahara and Sahel Observatory (OSS).

Published
2018
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2. Towards an intelligent possibilistic web information retrieval using multiagent system

Author

Fabrice Evrard, Mohamed Ben Ahmed, Bilel Elayeb, Montaceur Zaghdoud, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), and Institut de Recherche en Informatique de Toulouse - IRIT (Toulouse, France)

Subjects
Internet, Information retrieval, Emerging technologies, Computer science, business.industry, Algorithme et structure de données, Worldwide web, Asset (computer security), Web, Education, Web information, Computer Science (miscellaneous), Selection (linguistics), Information system, Information systems, The Internet, Relevance (information retrieval), User studies, business, Preference (economics)
Abstract

PurposeThe purpose of this paper is to make a scientific contribution to web information retrieval (IR).Design/methodology/approachA multiagent system for web IR is proposed based on new technologies: Hierarchical Small‐Worlds (HSW) and Possibilistic Networks (PN). This system is based on a possibilistic qualitative approach which extends the quantitative one.FindingsThe paper finds that the relevance of the order of documents changes while passing from a profile to another. Even if the selected terms tend to select the relevant document, these terms are not the most frequent of the document. This criterion shows the asset of the qualitative approach of the SARIPOD system in the selection of relevant documents. The insertion of the factors of preference between query terms in the calculations of the possibility and the necessity consists in increasing the scores of possibilistic relevance of the documents containing these terms with an aim of penalizing the scores of relevance of the documents not containing them. The penalization and the increase in the scores are proportional to the capacity of the terms to discriminate between the documents of the collection.Research limitations/implicationsIt is planned to extend the tests of the SARIPOD system to other grammatical categories, like refining the approach for the substantives by considering for example, the verbal occurrences in names definitions, etc. Also, it is planned to carry out finer measurements of the performances of SARIPOD system by extending the tests with other types of web documents.Practical implicationsThe system can be useful to help research students find their relevant scientific papers. It must be located in the document server of any research laboratory.Originality/valueThe paper presents SARIPOD, a new qualitative possibilistic model for web IR using multiagent system.

Published
2009
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3. Experimental performance analysis of routing metrics in Wireless Mesh Networks

Author

Leila Azouz Saidane, Chiraz Houaidia, Thierry Val, Adrien van den Bossche, Hanen Idoudi, Centre National de la Recherche Scientifique - CNRS (FRANCE), Ecole Nationale des Sciences de l'Informatique - ENSI (TUNISIA), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), Institut de Recherche en Informatique de Toulouse - IRIT (Toulouse, France), Institut National Polytechnique de Toulouse - INPT (FRANCE), École Nationale des Sciences de l'Informatique [Manouba] (ENSI), Université de la Manouba [Tunisie] (UMA), Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, and Université Toulouse - Jean Jaurès (UT2J)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Dynamic Source Routing, Computer science, Equal-cost multi-path routing, Performance, Routing table, Enhanced Interior Gateway Routing Protocol, Système d'exploitation, Réseaux et télécommunications, Wireless Routing Protocol, 02 engineering and technology, Metrics, Routing Information Protocol, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0203 mechanical engineering, Architectures Matérielles, Packet loss, 0202 electrical engineering, electronic engineering, information engineering, Metric, Wireless mesh network, Routing, Zone Routing Protocol, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Testbed, 020206 networking & telecommunications, 020302 automobile design & engineering, Order One Network Protocol, Ad hoc wireless distribution service, Systèmes embarqués, OLSR, Optimized Link State Routing Protocol, Link-state routing protocol, Multipath routing, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, Hazy Sighted Link State Routing Protocol, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], business, Computer network
Abstract

International audience; This paper provides a description of a wireless mesh network testbed setup and a measurement-based performance evaluation of the Optimized Link State Routing (OLSR) protocol [7] under three different routing metrics. The considered metrics include hop-count, ETX and ETT. The network performances are evaluated in an indoor testbed formed by heterogeneous MIMO devices. A part of our tests was about the impact of 802.11n features on the network performances showing the importance of lower layers consideration. Our measurements point out the shortcoming of each metric and eventual optimizations towards a more efficient routing. Experimental results show that OLSRETT outperforms OLSR-ETX and OLSR-hopcount significantly in terms of packet loss, end-to-end delay, and efficiency.

Published
2013
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4. Transmission de la voix sur des liens sans fil IEEE 802.15.4

Author

Sabri Khssibi, Adrien van den Bossche, Hanen Idoudi, Leila Azzouz Saidane, Thierry VAL, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université Toulouse - Jean Jaurès (UT2J), Université de la Manouba [Tunisie] (UMA), and Institut National Polytechnique de Toulouse - INPT (FRANCE)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], MAC, Système d'exploitation, Réseaux et télécommunications, 802.15.4, Voix, Systèmes embarqués, WSN, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Architectures Matérielles, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], Codec
Abstract

National audience; L'évolution de la technologie au niveau des composants électroniques et informatiques a permis la naissance de plusieurs projets comme CANet qui a comme but l'amélioration des conditions de vie, particulièrement pour les personnes âgées. Ce projet permet aux personnes âgées de conserver les mêmes conditions de vie, tout en surveillant leur état de santé sans les déranger. Une des fonctionnalités de CANet est de dialoguer oralement avec une personne via sa canne de marche en utilisant un lien sans fil. Dans ce papier, nous étudions le meilleur codec qui doit être utilisé avec la norme IEEE 802.15.4.

5. Novel Link Availability Aware Metrics for Routing in Wireless Mesh Networks

Author

Leila Azouz Saidane, Thierry Val, Adrien van den Bossche, Hanen Idoudi, Chiraz Houaidia, Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université de la Manouba [Tunisie] (UMA), Université Toulouse - Jean Jaurès (UT2J), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), and Institut National Polytechnique de Toulouse - INPT (FRANCE)

Subjects
Routing protocol, [INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Dynamic Source Routing, Computer science, Equal-cost multi-path routing, Distributed computing, Système d'exploitation, Réseaux et télécommunications, RoutingMetrics, 02 engineering and technology, Metrics, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Architectures Matérielles, 0202 electrical engineering, electronic engineering, information engineering, Wireless Mesh Network, 020203 distributed computing, QoS Routing, Wireless mesh network, business.industry, Testbed, 020206 networking & telecommunications, Systèmes embarqués, Optimized Link State Routing Protocol, Metric (mathematics), Hazy Sighted Link State Routing Protocol, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], business, Interference, Computer network, Routing Metrics
Abstract

International audience; This paper presents two novel metrics, Link Occupancy aware routing Metric (LOM) and Residual Link Capacity based routing metric with Interference Consideration (RLCIC), for accurately finding high-throughput paths in multihop wireless mesh networks. The first metric is load-sensitive and aims to balance the traffic load according to the availability of a link to support additional flows. The second metric reproduces better the capacity of a link since it is based on its residual bandwidth. It captures accurately the available path bandwidth information when considering both the intra-flow and the interflow interferences. Using several real experiments carried out into an heterogeneous IEEE 802.11n based network running with OLSR routing protocol, we have shown that our first proposal can accurately determine better paths in terms of throughput and delay, thereby significantly outperforming the other existing metrics. The consistency of the second metric RLCIC is proved formally based on notions of graph theory.

6. Link Availability Aware Routing Metric For Wireless Mesh Networks

Author

Chiraz Houaidia, Adrien van den Bossche, Leila Azouz Saidane, Thierry Val, Hanen Idoudi, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université de la Manouba [Tunisie] (UMA), Université Toulouse - Jean Jaurès (UT2J), and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Dynamic Source Routing, Computer science, Distributed computing, Système d'exploitation, Wireless Routing Protocol, Réseaux et télécommunications, 02 engineering and technology, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Architectures Matérielles, 0202 electrical engineering, electronic engineering, information engineering, Wireless Mesh Network, Static routing, Zone Routing Protocol, IEEE 802.11n, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Testbed, 020206 networking & telecommunications, Systèmes embarqués, OLSR, Link-state routing protocol, Multipath routing, Expected transmission count, 020201 artificial intelligence & image processing, Hazy Sighted Link State Routing Protocol, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], business, Computer network, Routing Metrics
Abstract

International audience; This paper investigates the design of effective routing metrics in the purpose of network resources optimization and the satisfaction of users QoS requirements. Using several real experiments, we point out the shortcoming of the Expected Transmission Count (ETX) metric for eventual optimizations towards a more efficient routing. Experiments were carried out into an heterogeneous IEEE 802.11n based network running with OLSR routing protocol and have shown that ETX presents several shortcoming resulting in inaccurate estimation of the link quality and then of the routing decision. This paper presents improvements of the ETX metric based on link availibility for accurately finding high-throughput paths in multihop wireless mesh networks.

7. Presentation and analysis of a new technology for low-power wireless sensor network

Author

Sabri Khssibi, Hanen Idoudi, Adrien van den Bossche, Thierry VAL, Leila Azzouz Saidane, Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université de la Manouba [Tunisie] (UMA), Université Toulouse - Jean Jaurès (UT2J), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), and Institut National Polytechnique de Toulouse - INPT (FRANCE)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], MAC protocol, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Architectures Matérielles, BLE, Système d'exploitation, Réseaux et télécommunications, 802.15.4, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, ANT, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], Systèmes embarqués, WSN
Abstract

International audience; The tremendous and rapid development in sensors technology allowed their application in various fields requiring monitoring, such as, transportations, rare species surveillance, agriculture, military activities, medical field, etc. Due to their intrinsic constraints and limitations, several dedicated MAC protocols have been designed for wireless sensor networks and whose main objectives are bandwidth optimization while keeping very low energy consumption. One of the newest proposals is ANT which is emerging as a widely used MAC protocol for wellness and sports sensor devices. In this paper, we give a comprehensive overview of ANT/ANT+ and a comparison between ANT and two established standards: Bluetooth Low Energy (BLE) and 802.15.4/4a. We detail also some practical experiments we conducted to evaluate some characteristics of ANT.

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