Marie-Aude Aufaure

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With the advent of social networks and micro-blogging systems, the way of communicating with other people and spreading information has changed substantially. Persons with different backgrounds, age and education exchange information and opinions, spanning various domains and topics, and have now the possibility to directly interact with popular users and(More)
In recent years, citizen oriented applications have been developed with Geographic Information Systems (GIS). This is the reason why visual querying appears to be crucial. In the past, we developed a visual language Lvis based on a query-by-example philosophy for spatial data. A query is formulated by means of icons which map spatial objects and operators.(More)
This paper presents an information retrieval methodology which uses formal concept analysis in conjunction with semantics to provide contextual answers to users' queries. User formulates a query on a set of heterogeneous data sources. This set is semantically unified by the proposed notion conceptual context. A context can be global: it defines a semantic(More)
Stories help us communicate knowledge, share and interpret experiences. In this paper we discuss the use of storytelling in Business Intelligence (BI) analysis. We derive the actual practices in creating and sharing BI stories from in-depth interviews with expert BI analysts (both story “creators” and “readers”). These interviews revealed the need to extend(More)
In this paper, we present a visual language dedicated to spatial data called Lvis. This language has been defined as an extension of the Cigales visual language based on the Query-By-Example principle. The language is based on predefined icons modelling spatial objects and operators which are used to build a visual query. The visual query is then translated(More)
The interoperability problem arises in heterogeneous systems where different data sources coexist and there is a need for meaningful information sharing. One of the most representive realms of diversity of data representation is the spatio-temporal domain. Spatio-temporal data are most often described according to multiple and greatly diverse perceptions or(More)
1. INTRODUCTION The development of mobile communication technology has released users from the constraints of desktop-bound activities; however, the type and format of services offered are mostly monotonous and mundane, focusing on email and SMS exchanges. Emerging technologies, such as Bluetooth, UMTS [1], GPRS, W-LAN have made it possible to provide(More)