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Real-time mapping of natural disasters using citizen update streams / Iranga Subasinghe in International journal of geographical information science IJGIS, vol 34 n° 2 (February 2020)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 34 n° 2 (February 2020) . - pp 393 - 421 Titre : Real-time mapping of natural disasters using citizen update streams Type de document : Article/Communication Auteurs : Iranga Subasinghe, Auteur ; Silvia Nittel, Auteur ; Michael Cressey, Auteur ; et al., Auteur Année de publication : 2020 Article en page(s) : pp 393 - 421 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] approche participative [Termes IGN] cartographie collaborative [Termes IGN] catastrophe naturelle [Termes IGN] classification par réseau neuronal [Termes IGN] diagramme de Voronoï [Termes IGN] données localisées des bénévoles [Termes IGN] effondrement de terrain [Termes IGN] incendie [Termes IGN] inondation [Termes IGN] positionnement cinématique en temps réel [Termes IGN] système multi-agents [Termes IGN] tempête [Termes IGN] temps réel [Termes IGN] ville intelligente Résumé : (auteur) Natural disasters such as flooding, wildfires, and mudslides are rare events, but they affect citizens at unpredictable times and the impact on human life can be significant. Citizens located close to events can provide detailed, real-time data streams capturing their event response. Instead of visualizing individual updates, an integrated spatiotemporal map yields ‘big picture’ event information. We investigate the question of whether information from affected citizens is sufficient to generate a map of an unfolding natural disaster. We built the Citizen Disaster Reaction Multi-Agent Simulation (CDR-MAS), a multi-agent system that simulates the reaction of citizens to a natural disaster in an urban region. We proposed an rkNN classification algorithm to aggregate the update streams into a series of colored Voronoi event maps. We simulated the 2018 Montecito Creek mudslide and customized the CDR-MAS with the local environment to systematically generate stream data sets. Our experimental evaluation showed that event mapping based on citizen update streams is significantly influenced by the amount of citizen participation and movement. Compared with a baseline of 100% participation, with 40% citizen participation, the event region was predicted with 40% accuracy, showing that citizen update streams can provide timely information in a smart city. Numéro de notice : A2020-031 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2019.1639185 Date de publication en ligne : 15/07/2019 En ligne : https://doi.org/10.1080/13658816.2019.1639185 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94486 [article]

Qualitative change detection using sensor networks based on connectivity information / J. Jiang in Geoinformatica, vol 15 n° 2 (April 2011)  

Public [article]  inGeoinformatica > vol 15 n° 2 (April 2011) . - pp 305 - 328 Titre : Qualitative change detection using sensor networks based on connectivity information Type de document : Article/Communication Auteurs : J. Jiang, Auteur ; Michael F. Worboys, Auteur ; Silvia Nittel, Auteur Année de publication : 2011 Article en page(s) : pp 305 - 328 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] aérosol [Termes IGN] analyse diachronique [Termes IGN] connexité (informatique) [Termes IGN] détection de changement [Termes IGN] données spatiotemporelles [Termes IGN] gaz [Termes IGN] réseau de capteurs [Termes IGN] Sensor Web Enablement [Termes IGN] traitement de données Résumé : (Auteur) The research reported in this paper uses wireless sensor networks to provide salient information about spatially distributed dynamic fields, such as regional variations in temperature or concentration of a toxic gas. The focus is on deriving qualitative descriptions of salient changes to areas of high-activity that occur during the temporal evolution of the field. The changes reported include region merging or splitting, and hole formation or elimination. Such changes are formally characterized, and a distributed qualitative change reporting (QCR) approach is developed that detects the qualitative changes simply based on the connectivity between the sensor nodes without location information. The efficiency of the QCR approach is investigated using simulation experiments. The results show that the communication cost of the QCR approach in monitoring large-scale phenomena is an order of magnitude lower than that using the standard boundary-based data collection approach, where each node is assumed to have its location information. Numéro de notice : A2011-087 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article DOI : 10.1007/s10707-009-0097-0 Date de publication en ligne : 22/10/2009 En ligne : https://doi.org/10.1007/s10707-009-0097-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30867 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-2011021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Ad hoc shared-ride trip planning by mobile geosensor networks / Stephan Winter in International journal of geographical information science IJGIS, vol 20 n° 8 (september 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 8 (september 2006) . - pp 899 - 916 Titre : Ad hoc shared-ride trip planning by mobile geosensor networks Type de document : Article/Communication Auteurs : Stephan Winter, Auteur ; Silvia Nittel, Auteur Année de publication : 2006 Article en page(s) : pp 899 - 916 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] méthode heuristique [Termes IGN] mobilité urbaine [Termes IGN] réseau de transport [Termes IGN] trajet (mobilité) [Termes IGN] transport collectif Résumé : (Auteur) Recent developments in miniaturization of computing devices, in location-sensing technology and in ubiquitous short-range wireless networks enable new types of social behaviour. This paper investigates one novel application of these technologies, ad hoc inner-urban shared-ride trip planning: Transportation clients such as pedestrians are seeking ad hoc shared rides from transportation hosts such as private automobiles, buses, taxi cabs or trains. While centralized trip planners are challenged by assigning clients and hosts in an ad hoc manner, in particular for non-scheduled hosts, we consider the transportation network as a mobile geosensor network of agents that interact locally by short-range communication and heuristic wayfinding strategies. This approach is not only fully scalable; we can also demonstrate that with short-range communication, and hence, incomplete transportation network knowledge a system still can deliver near-to-optimal trips. Numéro de notice : A2006-350 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810600816664 En ligne : https://doi.org/10.1080/13658810600816664 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28074 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06081	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06082	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Formal information modelling for standardisation in the spatial domain / Stephan Winter in International journal of geographical information science IJGIS, vol 17 n° 8 (december 2003)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 17 n° 8 (december 2003) . - pp 721 - 741 Titre : Formal information modelling for standardisation in the spatial domain Type de document : Article/Communication Auteurs : Stephan Winter, Auteur ; Silvia Nittel, Auteur Année de publication : 2003 Article en page(s) : pp 721 - 741 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] analyse comparative [Termes IGN] interface logicielle [Termes IGN] interopérabilité [Termes IGN] langage fonctionnel [Termes IGN] modèle orienté objet [Termes IGN] normalisation [Termes IGN] Open GIS Consortium [Termes IGN] spécification de processus [Termes IGN] système d'information géographique [Termes IGN] UML Résumé : (Auteur) This paper presents the results and experiences of applying a formal tool to writing specifications for software in the spatial domain. We take a specification from a standards organization to demonstrate the properties of this approach, and we compare our result with the semi-formal specification of the standards organization. The expected advantages formal semantics of specified interfaces, total abstraction from implementation, executable prototype, and extendable algebraic structure - can be verified. However negative experiences are reported also: pure abstract code turns out to appear overloaded and difficult to read (by humans). With this work we contribute to the foundations of standardisation efforts in the spatial domain, preserving an object oriented modeling approach. Numéro de notice : A2003-297 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810310001596067 En ligne : https://doi.org/10.1080/13658810310001596067 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22593 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-03081	RAB	Revue	Centre de documentation	En réserve L003	Disponible