Numerical modeling of wave propagation in complex media : application to unconsolidated granular media

Autor: Asfour, Kassem

Publikováno v: Geophysics [physics.geo-ph]. Université Paul Sabatier-Toulouse III, 2021. English. ⟨NNT : 2021TOU30195⟩

The subsurface, which contains many natural resources (water, gas, oil, etc.), can also constitute a natural risk because of its lithological and topographical characteristics. In the context of climate change, it becomes more and more important to e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::ae33ff5faf77d3b17779f9527256d7ef
https://theses.hal.science/tel-03664816/document

Guides d'onde phononiques topologiques

Autor: Laforge, Nicolas

Publikováno v: Mécanique [physics]. Université Bourgogne Franche-Comté, 2021. Français. ⟨NNT : 2021UBFCD017⟩

Metamaterials are materials designed by man with static or dynamic properties inaccessible to natural materials. Among them, phononic crystals consist of a periodic assembly of two or more materials, and are mainly used for the design of waveguiding

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::ee3d755a2642d759be4946a41f9a214a
https://tel.archives-ouvertes.fr/tel-03359705

Contribution au développement d'une méthode à ondes acoustiques de surface hautes fréquences dédiée à la caractérisation ultrasonore des structures à couches minces et au silicium mésoporeux

Autor: Kadi, Tahar

Publikováno v: Acoustique [physics.class-ph]. Université Polytechnique Hauts-de-France; Institut national des sciences appliquées Hauts-de-France, 2021. Français. ⟨NNT : 2021UPHF0023⟩

This work is within the scope of characterization of thin layers, coatings and functional surfaces (thickness, elastic constants, porosity,…). Among the characterization methods, the ultrasonic methods using surface acoustic waves are particularly

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::53188c961814d8ba456285692ca67210
https://uphf.hal.science/tel-03385665

Etude de la déformation de la croûte et du manteau terrestres à partir de l'anisotropie sismique des modèles tomographiques

Autor: Alder, Chloé

Publikováno v: Sciences de la Terre. Université de Lyon, 2020. Français. ⟨NNT : 2020LYSEN021⟩

Seismic anisotropy is often used as a proxy for rock deformation. It arises from the preferred orientation of anisotropic minerals. For instance, olivine in mantellic peridotites align according to mantle flow. However, anisotropy in tomographic mode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::2e14ca5cb37e66f00038af264d7da5cd
https://tel.archives-ouvertes.fr/tel-02965440/document

The two-dimensional problem of steady waves on water of finite depth: regimes without waves of small amplitude

Autor: Kozlov, Vladimir ^a, Kuznetsov, Nikolay ^{b, ⁎}

Publikováno v: In Comptes rendus - Mécanique 2005 333(10):733-738