International audienceCrowdsensing has been used quite regularly in recent years to study smartphone usage. However context information associated with smartphone usage is mostly of the type geo-localisation, user mobility, temporal behavior etc. Furthermore most studies are not sufficiently user-centric i.e. don't consider the perception or cognitive aspects of the user. In this paper we collect data about social context and user perception via in-app and on-line questionnaires and show that when these are combined with crowdsensed data can help improve both sensing and survey and can be applied to interesting cases

In this paper we present an exploratory smartphone usage study with logs collected from users in the wild, combined with the sociodemographic, technological and cultural information provided by them. We observe a high diversity among users' most used applications, but by classifying applications into services we find significant correlations between service usage and socio-demographic profile. We discuss that sociological information has rich potential in characterizing smartphone usage and can be applied to interesting incentive strategies and use cases based on users' sociological context.

De la nécessité d'adopter une posture scientifique et critique au temps du nu...

Nous comparons ici les crises vocationnelles et les reconversions consécutives des deux compositeurs, solistes et chefs d’orchestre savants Heitor Villa-Lobos et Radamés Gnattali à deux formes différentes de culture de masse : l’éducation nationale et la radiodiffusion publicitaire. La reconfiguration de l’espace musical a suscité chez eux des stratégies de reconversion qui les éloignaient initialement de leurs aspirations initiales. Mais nous montrons comment ces reconversions contribuent à inventer de nouvelles formes de mécénat (par l’État, par la publicité), et qu’outre les conditions de production, elles permettent de mettre en exergue le rôle actif qu’ils ont pu prendre dans la création d’un public et d’une esthétique nouvelle, correspondant à de nouvelles pratiques musicales, partagées sur le territoire. Ces reconversions se sont finalement avérées être l’une des conditions de leur consécration comme producteurs d’oeuvres savantes emblématiques du collectif national.The comparative analysis of paths here represents a basis for questioning the very notion of acclaim, its mutations and mediations, through the lens of nationalist mass culture, promoted starting in the 1930s in Brazil. While the almost canonical path of Villa-Lobos, the “Brazilian genius, ” seems obvious, it is surprising to note that the “reconversion from the ground up” of Radamés Gnattali in popular Brazilian music would also end up bearing its fruits a few decades later. He would achieve national recognition as the “civilizer” of popular music on the radio, reaching national and international acclaim in the field of art music, all this in the context of a reconfiguration of the relations between popular music and art music starting in the 1950s, then in the context of the military dictatorship in the 1960s.El análisis comparado de las trayectorias se constituye aquí en soporte que permite cuestionar la noción de consagración, sus mutaciones y mediaciones, a través del prisma de la cultura nacionalista de masa, promovida a partir de los años 1930 en Brasil. Mientras que la trayectoria casi canónica del “genio brasileño” Villalobos parece evidente, es sorprendente constatar que la “reconversión desde abajo” de Radamés Gnattali en la música popular brasileña acabará igualmente, algunos decenios más tarde, por dar sus frutos. Éste lograra alcanzar un reconocimiento nacional como “civilizador” de la música popular en la radio, en el contexto de una reconfiguración de las relaciones entre música popular y música erudita a partir de los años 1950, y luego en el contexto de la dictadura militar de los años 1960, a una consagración nacional e internacional en el campo de la música erudita