Orange S.A.

About: Orange S.A. is a company organization based out in Paris, France. It is known for research contribution in the topics: Terminal (electronics) & Signal. The organization has 6735 authors who have published 9190 publications receiving 156440 citations. The organization is also known as: Orange SA & France Télécom.

Cigales, a Visual Query Language for a Geographical Information System: the User Interface

Abstract: In this paper we focus on the design and the implementation of a query language, Cigales (Cartographical Interface Generating an Adapted Language for Extensible Systems), for geographical information systems. This language is based on a visual and declarative query-by-example philosophy. The semantics of an end-user query is expressed by a drawing. We present the querying philosophy of the Cigales language. To take into account the particularities of the visual query language and the geographical data, we introduce several extensions to the classical database models (i.e. the icons, the variables, the overlap of the spatial representation). To illustrate the concepts of the Cigales language, we provide the representation of several queries (involving a unique 'object', two 'objects' without operators, two 'objects' linked with a spatial operator, several 'objects' linked with several spatial operators). Since the design of a user interface is an iterative process, the implementation is still going on and we present the current state of the Cigales prototype.

GaAsSbN: a new low-bandgap material for GaAs substrates

Abstract: A new low-bandgap III-V compound grown on GaAs (GaAsSbN) has been investigated. Strained quantum wells were realised by molecular beam epitaxy with a nitrogen plasma source. The influence of Sb content on the level of nitrogen incorporation has been examined and no strong dependence was found. This material offers an interesting alternative to InGaAsN for developing 1.3 and 1.55 /spl mu/m laser sources on GaAs substrates: a GaAs/sub 0.729/Sb/sub 0.259/N/sub 0.012//GaAs quantum well has exhibited a room-temperature photoluminescence peak wavelength as long as 1.52 /spl mu/m. This emission is shifted to 1.3 /spl mu/m after post-growth annealing.

Gain control in erbium-doped fibre amplifiers by lasing at 1480 nm with photoinduced Bragg gratings written on fibre ends

Abstract: Two photoinduced Bragg reflectors at 1480 nm are written at both ends of the fibre amplifier. Above threshold, laser oscillation clamps the gain and suppresses low frequency signal or pump induced gain fluctuations.

Overview of the optical broadband access evolution: a joint article by operators in the IST network of excellence e-Photon/One

Abstract: This article presents an operators' view of the evolution towards broadband optical access networks. First, we describe a possible evolution of the optical access solution for point-to-point and point-to-multipoint architectures. Subsequently, currently available optical access solutions are evaluated and compared. Finally, we consider regulatory issues inside and outside Europe, and conclude by offering a recommendation with respect to regulation

Le télétravail des cadres : entre suractivité et apprentissage de nouvelles temporalités

Abstract: Le teletravail est souvent considere comme un moyen d’ameliorer l’articulation entre vie professionnelle et vie privee. Toutefois, pourquoi certains salaries, et singulierement des cadres, en viennent-ils a choisir cette modalite ? S’agit-il d’ailleurs bien d’un choix ou de l’adoption d’une solution « faute de mieux », dans un contexte organisationnel contraignant ? Et dans ce cas, a quels arbitrages temporels procedent-ils ? Par ailleurs, des lors qu’ils ont opte pour le teletravail, comment les cadres parviennent-ils a accommoder les contraintes professionnelles et familiales ? Leurs aspirations a une meilleure conciliation sont-elles satisfaites ou rencontrent-ils des difficultes insoupconnees ? Le present article apporte des reponses a ces differentes questions, en s’appuyant sur deux etudes menees aupres de cadres pratiquant differentes formes de teletravail. Il souligne, finalement, que l’absence d’une regulation institutionnelle de l’articulation entre vies privee et professionnelle, loin d’assurer une existence plus equilibree, presente des risques sur l’efficacite collective.