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Affichage de 2761 à 2770 sur 16175

Communication dans un congrès

Evanescent coupling between aluminum pillars

Rock Akiki, Yan Pennec, Adnane Noual, Eric Lheurette, Bernard Bonello, Bahram Djafari-Rouhani

We theoretically investigate, with the help of the finite element method, the interaction between aluminum pillars erected on top of a semi-infinite substrate of silicon in the low frequency range. Our interest is to control and manipulate the propagation of the surface acoustic waves through a...

15th International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials 2021), Sep 2021, NewYork, United States. pp.8-10, ⟨10.1109/Metamaterials52332.2021.9577151⟩. ⟨hal-03463038⟩

Communication dans un congrès

Silicon nitride drum resonators with a top-gate capacitive coupling scheme

Xin Zhou, Srisaran Venkatachalam, Alok Pokharel, Andrew Fefferman, Eddy Collin

Silicon nitride (Si¬3N4) based micro- and nano-electromechanical system (NEMS and MEMS) allow electrical signals to couple with a mechanical degree of freedom and give access to electrical integration on-chip. They are attractive applications of mass/force sensing and signal processing, because...

Micro and Nano Engineering Conference, Sep 2021, Turin, Italy. ⟨hal-04415196⟩

Communication dans un congrès

[Invited] How bio-inspiration enhances the potential of phononic crystals and metamaterials

M. Miniaci, A. Bergamini, F. Bosia, A. S Gliozzi, N. M Pugno

Nature has always represented a fundamental source of inspiration to solve mankind's scientific challenges and engineering tasks. For instance, it has been shown that a hierarchical organization over multiple length scales allows enhanced quasi-static mechanical properties, while the relative...

2021 Fifteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials), Sep 2021, NYC, United States. pp.269-271, ⟨10.1109/metamaterials52332.2021.9577112⟩. ⟨hal-03440823⟩

Communication dans un congrès

Coupling Helmholtz resonators for sound manipulation

R. Sabat, Gaëtan Lévêque, Yan Pennec, D. Torrent, Bahram Djafari-Rouhani

In this work, we discuss the interaction between Helmholtz resonators, using the finite element method. We show that the coupling between two spheres gives rise to two resonant modes at low frequencies. One is symmetric and corresponds to a mono-polar breathing mode, as currently observed. The...

15th International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials 2021), Sep 2021, NewYork, United States. pp.328-330, ⟨10.1109/Metamaterials52332.2021.9577138⟩. ⟨hal-03463776⟩

Communication dans un congrès

Corrosion monitoring based on diffuse ultrasonic CWI technique applied to infrastructures in contact with sea water: case study

Simon Khelissa, Cyril Nicard, Maxime Farin, Oliver Brehault, Ingrid Proriol Serre, Emmanuel Moulin, Pierre Campistron, Lynda Chehami, David Balloy, Farouk Benmeddour, Thomas Dubois, Guillaume Delaplace

The present study has been conducted in the frame of Interreg SOCORRO2 (Seeking out corrosion - before it is too late) project which aims to provide industries with an independent tool to assess corrosion risks of their installations in contact with sea water. The implementation of such a tool...

Eurocorr 2021, Sep 2021, Budapest, Hungary. ⟨hal-03400992⟩

Article dans une revue

Ear Recognition Based on Deep Unsupervised Active Learning

Yacine Khaldi, Amir Benzaoui, Abdeldjalil Ouahabi, Sebastien Jacques, Abdelmalik Taleb-Ahmed

Cooperative machine learning has many applications, such as data annotation, where an initial model trained with partially labeled data is used to predict labels for unseen data continuously. Predicted labels with a low confidence value are manually revised to allow the model to be retrained with...

IEEE Sensors Journal, 2021, 21 (18), pp.20704-20713. ⟨10.1109/JSEN.2021.3100151⟩. ⟨hal-03429751⟩

Communication dans un congrès

Embedded ICG-based Stroke Volume Measurement System: Comparison of Discrete-Time and Continuous-Time Architectures

Antoine Gautier, Benoit Larras, Olev Märtens, Deepu John, Antoine Frappé

This paper describes the study of an integrated system for the detection of the B-C-X characteristic points of impedance cardiography (ICG) signals, to evaluate the stroke volume of a patient. It compares a discrete-time digital approach and a continuous-time digital architecture, using a level-...

34th IEEE International System-On-Chip Conference, Socc 2021, Sep 2021, Las Vegas, NV, United States. ⟨10.1109/SOCC52499.2021.9739386⟩. ⟨hal-03482323⟩

Article dans une revue

Identification of ultra high frequency acoustic coda waves using deep neural networks

Venu Babu Thati, Nikolay Smagin, Hatem Dahmani, Julien Carlier, Ihsen Alouani

Due to the multi-path propagation and extreme sensitivity to minor changes in the propagation medium, the coda waves open new fascinating possibilities in the non-destructive evaluation and acoustic imaging. However, their noise-like structure and high spurious sensitivity for ambient conditions (...

IEEE Sensors Journal, 2021, 21 (18), pp.20640-20647. ⟨10.1109/JSEN.2021.3099078⟩. ⟨hal-03364923⟩

Article dans une revue

Thin-film adhesion: a comparative study between colored picosecond acoustics and spontaneous buckles analysis

Arnaud Devos, A. Vital-Juarez, A. Chargui, M.J. Cordill

This paper presents some quantitative measurements of the adhesion energy of thin WTi films deposited on Si substrate. Two different techniques are applied to the same sample series. One is a mechanical test based on the analysis of spontaneously formed defects. The second is based on acoustic...

Surface and Coatings Technology, 2021, 421, pp.127485. ⟨10.1016/j.surfcoat.2021.127485⟩. ⟨hal-03282288⟩

Article dans une revue

In depth analysis of transfer length method application on passivated contacts under illumination

Léo Basset, Wilfried Favre, Olivier Bonino, Julien Sudre, Gilles Ménard, Jean-Pierre Vilcot

Although solar cells operate under illumination, most electrical characterization methods are carried out in darkness, which implies some bias. In this work, we study the influence of light on the contact resistivity of the electron and hole contacts of a silicon heterojunction (SHJ) cell using the...

Solar Energy Materials and Solar Cells, 2021, 230, pp.111255. ⟨10.1016/j.solmat.2021.111255⟩. ⟨hal-03275996⟩