8 datasets found

Cette thèse a pour but d'évaluer l'hétérogénéité crustale et de comprendre son effet sur la propagation des ondes sismiques. Nous étudions l'énergie de la coda de...

This thesis presents the study of ultrasonic multiple scattering in media with a complex microstructure. In the context of Non-Destructive Testing (NDT), our media of...

This manuscript is devoted to the study of the ultrasonic wave propagation operator in random media. The experimental set up consists in a multi-element array placed...

Photosynthesis engineering is a promising mean to produce both energy carriers and fine chemicals in order to remedy the growing scarcity of fossil fuels. This is a...

In highly heterogeneous media, waves don't propagate ballistically. They can interact several times with the heterogeneities of the medium and enter the multiple...

Stealth is a major issue in naval defence. In this context, DCNS Research wants to know if locally-resonant acoustic metamaterials represent a technological...

This experimental thesis work focuses on the linear and nonlinear propagation of ultrasounds in highly heterogeneous random media. In the nonlinear regime, we...

In this thesis we present a numerical and theoretical study of the interplay between cooperative effects and light localization in atomic vapour, completed by an...