Phd Position F/m Sampling Method for Stratified

Le descriptif de l’offre ci-dessous est en Anglais_ **Type de contrat **:CDD **Niveau de diplôme exigé **:Bac + 5 ou équivalent **Fonction **:Doctorant **Mission confiée**: In the context of non-destructive testing (NDT) of the civil engineering of EDF's nuclear and hydro power plants in operation, the challenges of extending the service life of installations and optimizing maintenance; of new construction, with the challenges of quality control and searching for construction defects; and finally of deconstruction, where knowledge of the existing state of the structure is limited (i.e. reinforcement plans, cut-outs, work, etc.), it is necessary to work on modernized, high-performance auscultation tools to meet these critical challenges. e.g. reinforcement plans, cut-outs, works, etc.), it is necessary to work on modernized, high-performance auscultation tools to provide answers to these critical issues. Basic measurement systems allow us to estimate the speed of ultrasonic waves in the medium, which is an indicator of its condition. Recently, a measurement system [3] has appeared on the market that can image a concrete structure in the same way as an ultrasound scan. It's a multi-element system comprising dry-contact transducers, requiring no coupling and thus facilitating its use on concrete. The transducers operate at frequencies of around 50 kHz, corresponding to a wavelength of the order of 5 cm, greater than the size of the concrete aggregates, thus limiting the phenomenon of wave multi-diffraction on the aggregates [4]. Indeed, inspection of this material is severely limited by this phenomenon due to its material heterogeneity. The system enables multi-static acquisitions, opening the way to more advanced imaging methods than the migration method conventionally used in NDT. **Principales activités**: References [1] F. Cakoni, D. Colton, H. Haddar, Inverse Scattering Theory and Transmission Eigenvalues, SIAM, 2016 [2] L. Audibert, The Generalized Linear Sampling and Factorization Methods only depends on the sign of the contrast on the boundary, Inverse Problems & Imaging [4] T. Yu, Modeling the propagation of ultrasonic waves in concrete for improved diagnosis of civil engineering structures, Aix-Marseille University thesis, 2018. [5] L. Audibert, Qualitative methods in heterogeneous medium, dissertation. Inverse Problems, 2021 **Compétences**: Technical skills and level required: Languages: Relational skills: Other valued appreciated: **Avantages**: - Subsidized meals - Partial reimbursement of public transport costs - Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.) - Possibility of teleworking (after 6 months of employment) and flexible organization of working hours - Professional equipment available (videoconferencing, loan of computer equipment, etc.) - Social, cultural and sports events and activities - Access to vocational training - Social security coverage **Rémunération**: Monthly gross salary : 2.190 euros **Informations générales**: - **Thème/Domaine**: Schémas et simulations numériques Calcul Scientifique (BAP E) - **Ville**: Palaiseau - **Centre Inria**: Centre Inria de Saclay - **Date de prise de fonction souhaitée**: 2024-12-02 - **Durée de contrat**: 6 mois - **Date limite pour postuler**: 2024-10-27 **Consignes pour postuler**: **Sécurité défense**: Ce poste est susceptible d’être affecté dans une zone à régime restrictif (ZRR), telle que définie dans le décret n°2011-1425 relatif à la protection du potentiel scientifique et technique de la nation (PPST). L’autorisation d’accès à une zone est délivrée par le chef d’établissement, après avis ministériel favorable, tel que défini dans l’arrêté du 03 juillet 2012, relatif à la PPST. Un avis ministériel défavorable pour un poste affecté dans une ZRR aurait pour conséquence l’annulation du recrutement. **Politique de recrutement**: Dans le cadre de sa politique diversité, tous les postes Inria sont accessibles aux personnes en situation de handicap. **Contacts**: - **Équipe Inria**: IDEFIX - **Directeur de thèse**: **L'essentiel pour réussir**: There you can provide a "broad outline" of the collaborator you are looking for what you consider to be necessary and sufficient, and which may combine: - tastes and appetencies, - area of excellence, - personality or character traits, - cross-disciplinary knowledge and expertise... This section enables the more formal list of skills to be completed and 'lightened' (reduced): - "Essential qualities in order to fulfil this assignment are feeling at ease in an environment of scientific dynamics and wanting to learn and listen." - " Passionate about innovation, with expertise in Ruby on Rails development and strong influencing skills. A thesis in the field of ** is a real asset." **A propos d'Inria*