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Affichage de 6341 à 6350 sur 16086

Article dans une revue

Tunability of a One-Dimensional Elastic/Piezoelectric Phononic Crystal Using External Capacitances

S. Degraeve, C. Granger, Bertrand Dubus, Jerome O. Vasseur, M. Pham Thi, Anne-Christine Hladky

A superlattice made of alternate rods constituted of piezoelectric ceramic and elastic material is shown, theoretically and experimentally, to exhibit wide Bragg band gaps. The width of these stop bands is affected not only by the elastic impedance ratio between the constituent materials but also...

Acta Acustica united with Acustica, 2015, 101 (3), pp.494-501. ⟨10.3813/AAA.918846⟩. ⟨hal-03300127⟩

Communication dans un congrès

A coupler-free differential noise figure measurement technique without noise source on a two-port network analyzer

Yogadissen Andee, Caroline Arnaud, Philippe Seurre, Francois Danneville

This paper presents a measurement technique for the noise figure of differential amplifiers using commercially-available 2-port network analyzers. It is based on the measurement of the noise wave correlation at the output ports of the differential amplifier. A simple measurement setup is used as...

IEEE Radio and Antenna Days of the Indian Ocean (RADIO), Sep 2015, Belle Mare, Mauritius. ⟨10.1109/RADIO.2015.7323398⟩. ⟨hal-03272704⟩

Article dans une revue

Changes of benthic bacteria and meiofauna assemblages during bio-treatments of anthracene-contaminated sediments from Bizerta lagoon (Tunisia)

O. Ben Said, Hela Louati, A. Soltani, Hugues Preud'Homme, Cristiana Cravo-Laureau, P. Got, O. Pringault, Patricia Aissa, Robert Duran

Sediments from Bizerta lagoon were used in an experimental microcosm setup involving three scenarios for the bioremediation of anthracene-polluted sediments, namely bioaugmentation, biostimulation, and a combination of both bioaugmentation and biostimulation. In order to investigate the effect of...

Environmental Science and Pollution Research, 2015, 22 (20), p. 15319-15331. ⟨10.1007/s11356-015-4105-7⟩. ⟨hal-01631846⟩

Article dans une revue

Sensing of liquid droplets with a scanning near-field microwave microscope

Kamel Haddadi, S. Gu, T. Lasri

We demonstrate a scanning near-field microwave microscope based on an interferometric technique for dielectric characterization in liquid media. The instrumentation combines a vector network analyzer, an interferometry-based matching network and an evanescent microwave coaxial probe. The...

Sensors and Actuators A: Physical , 2015, 230, pp.170-174. ⟨10.1016/j.sna.2015.04.028⟩. ⟨hal-03224663⟩

Article dans une revue

Design of Environmental Biosensor Based on Photonic Crystal Fiber with Bends Using Finite Element Method

Shyqyri Haxha, Ahmed Teyeb, Fathi Abdel Malek, Emmanuel Kofi Akowuah, Iyad Dayoub

In this paper, a biosensor based on photonic crystal fiber (PCF) is proposed and designed using Full-Vectorial Finite Element Method (FVFEM). The proposed PCF sensor consists of three concentric circles surrounding the core. The key optical sensor characteristics such as sensitivity, the field...

Optics and Photonics Journal, 2015, 05 (03), pp.69-78. ⟨10.4236/opj.2015.53006⟩. ⟨hal-03383011⟩

Communication dans un congrès

High Frequency Acoustic Reflectometry for Solid/Liquid Interface Characterization: Application to Droplet Evaporation

Julien Carlier, Malika Toubal, Sizhe Li, Pierre Campistron, Dorothée Debavelaere-Callens, V. Thomy, Vincent Senez, Bertrand Nongaillard

Evolution of the local concentration in a 1 mL droplet of ethanol/water mixture during an evaporation process has been followed using high frequency acoustic reflectometry. This method has been developed for wetting characterization on micro/nanostructures and makes it possible to follow...

2015 ICU International Congress on Ultrasonics, May 2015, Metz, France. ⟨10.1016/j.phpro.2015.08.285⟩. ⟨hal-03280233⟩

Communication dans un congrès

Non-contact ultrasonic non-destructive techniques : state of the art and their use in civil engineering

Mariusz Kaczmarek, Bogdan Piwakowski, Radoslaw Drelich

Ultrasonic methods of testing of civil engineering materials in air where both transmission of waves into materials and reception of signals are contactless are reviewed. Short history, technical details and examples of applications of currently available methods are discussed. Keywords: ultrasound...

International Symposium on Non-Destructive Testing in Civil Engineering, NDT-CE 2015, Sep 2015, Berlin, Germany. 4 p. ⟨hal-04087510⟩

Communication dans un congrès

Cristal phononique piézomagnétique à une dimension : contrôle de la propagation par inductance variable

Marie-Fraise Ponge, Jérôme Vasseur, Olivier Bou Matar, Anne-Christine Hladky, Bertrand Dubus

Cette étude concerne un cristal phononique à une dimension constitué d'un empilement de couches piézomagnétiques identiques. Chaque couche est entourée par une bobine connectée à une inductance extérieure. Les ondes élastiques longitudinales se propageant dans cette structure sont étudiées...

CFM 2015 - 22ème Congrès Français de Mécanique, Aug 2015, Lyon, France. ⟨hal-03445058⟩

Chapitre d'ouvrage

Fundamental properties of phononic crystal

Yan Pennec, Bahram Djafari-Rouhani

Phononic crystals are periodic composite structures where the elastic and acoustic properties display a periodic variation in space. They are in general constituted by a periodic array of inclusions in a matrix. Due to their periodicity, they can exhibit absolute band gaps in which the propagation...

Phononic Crystals: Fundamentals and Applications, Springer New York, pp.23-50, 2015, 9781461493938; 9781461493921. ⟨10.1007/978-1-4614-9393-8_2⟩. ⟨hal-03508196⟩

Article dans une revue

Plasticity in memristive devices for spiking neural networks

S. Saïghi, C.G. Mayr, T. Serrano-Gotarredona, H. Schmidt, G. Lecerf, J. Tomas, J. Grollier, S. Boyn, A.F. Vincent, D. Querlioz, S. La Barbera, F. Alibart, Dominique Vuillaume, O. Bichler, C. Gamrat, B. Linares-Barranco

Memristive devices present a new device technology allowing for the realization of compact non-volatile memories. Some of them are already in the process of industrialization. Additionally, they exhibit complex multilevel and plastic behaviors, which make them good candidates for the implementation...

Frontiers in Neuroscience, 2015, 9, pp.51. ⟨10.3389/fnins.2015.00051⟩. ⟨cea-01846866⟩