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.

System and method for implementing dynamic access control rules to personal cloud information

Abstract: A system and method are provided for sharing data of a user with contacts, the method comprising collecting the contacts from the user, collecting data related to the communications between the user and his contacts, and automatically grouping the contacts into different groups based on a level of communications between the user and the user's contacts, defining an access level for each group, with each access level granting access to some part of the user's data based on the access level. Advantageously, this permits a dynamic assignment of authority to access content that does not have to be actively managed by the user.

Strong Electron-Phonon Coupling Regime in Quantum Dots: Evidence for Everlasting Resonant Polarons

Abstract: Using far-infrared magnetospectroscopy in self-assembled InAs quantum dots, we have investigated the electronic transitions from the ground $s$ levels to the excited $p$ levels. The experiments consist of monitoring, by means of Zeeman tuning of the excited level, a resonant interaction between the discrete ( $p,0$ LO phonon) state and the continuum of either ( $s,1$ LO phonon) or ( $s,2$ LO phonons). We show that the electrons and the LO phonons are always in a strong coupling regime and form an everlasting mixed electron-phonon mode.

An Open Component Model and Its Support in Java

Abstract: This paper presents Fractal, a hierarchical and reflective component model with sharing. Components in this model can be endowed with arbitrary reflective capabilities, from black-boxes to components that allow a fine-grained manipulation of their internal structure. The paper describes Julia, a Java implementation of the model, a small but efficient run-time framework, which relies on a combination of interceptors and mixins for the programming of reflective features of components. The paper presents a qualitative and quantitative evaluation of this implementation, showing that component-based programming in Fractal can be made very efficient.

Chiral metal complexes with large octupolar optical nonlinearities

Abstract: OPTICALLY nonlinear organic materials show considerable potential for applications in optical signal processing and telecommunications1,2. Most materials are based on the p-nitro-aniline template, in which the optical nonlinearities are intimately associated with quasi-one-dimensional charge transfer. But there are problems associated with this conventional approach, arising from the strongly dipolar nature of the molecules2. It has recently been recognized3–5 that two- and three-dimensional stereochemistry offers new possibilities for the design and synthesis of optically nonlinear molecules, in which charge transfer is multidirectional rather than dipolar in character; octupolar nonlinearities have now been demonstrated in several molecular systems5–7. Tri-substituted ruthenium complexes6 appear particularly attractive because intense, multidirectional metal-to-ligand charge transfer leads to a significant enhancement of the optical nonlinearity, as quantified by the quadratic hyperpolarizability, β. Here we show that the choice of ligand can further increase β to values in excess of 10-27e.s.u., comparable to the best dipolar optically nonlinear molecules.