Search Results - "Mechri, C."

Conditioning and elastic nonlinearity in concrete: Separation of damping and phase contributions by Scalerandi, M., Bentahar, M., Mechri, C.

“…•We study the nonlinear elastic properties of various concrete types and mortar samples.•We analyze separately effects of nonlinearity on damping and…”
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Enhancement of harmonics generation in hysteretic elastic media induced by conditioning by Mechri, C., Scalerandi, M., Bentahar, M.

“…•In this paper we show that conditioning, i.e. memory effects due to the application of a medium level strain, is responsible of activation of nonlinearity in…”
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Role of slow dynamics in fast dynamics ultrasonic measurements by Scalerandi, M., Mechri, C., Bentahar, M., Di Bella, A., Gliozzi, A.S., Tortello, M.

“…•The different power law dependences of nonlinear indicators observed when slow dynamic effects are removed from the measurement using specific measurement…”
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Confined coherent acoustic modes in a tubular nanoporous alumina film probed by picosecond acoustics methods by Mechri, C, Ruello, P, Gusev, V

“…Coherent GHz acoustic phonon dynamics in a tubular nanoporous alumina film is studied with picosecond acoustic methods. This study has allowed the…”
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Depth-profiling of elastic inhomogeneities in transparent nanoporous low-k materials by picosecond ultrasonic interferometry by Mechri, C., Ruello, P., Breteau, J. M., Baklanov, M. R., Verdonck, P., Gusev, V.

“…We achieve depth-profiling of the elasticity of a thin transparent film of a nanoporous low-k material using picosecond acoustic interferometry. The variation…”
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Characterization of Microcracking in Polymer Concrete Using Multiple Scattered Waves Under Steady-State Vibration Conditions by Toumi, S., Mechri, C., Bentahar, M., Boubenider, F., El Guerjouma, R.

“…This work presents the development of an ultrasonic method based on the use of multiple-scattered waves to detect and image microcracks in polymer concrete…”
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Evaluation of elastic properties of nanoporous silicon oxide thin films by picosecond laser ultrasonics by Mechri, C., Ruello, P., Gusev, V., Breteau, J. M., Mounier, D., Henderson, M., Gibaud, A., Dourdain, S.

“… Picosecond laser ultrasonics uses femtosecond laser pulses for the generation and detection of acoustic pulses with a typical duration between few…”
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Nonlinear elastic imaging with amplitude and frequency modulated low frequency sources by Bentahar, M., Mechri, C., Scalerandi, M.

“…The use of low frequency waves is the most practical means to investigate nonlinear elastic properties of hysteretic media, such as the strain dependence of…”
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Depth-profiling of elastic inhomogeneities in transparent nanoporouslow- k materials by picosecond ultrasonic interferometry by Mechri, C., Ruello, P., Breteau, J. M., Baklanov, M. R., Verdonck, P., Gusev, V.

“…We achieve depth-profiling of the elasticity of a thin transparent film of a nanoporous low- k material using picosecond acoustic interferometry. The variation…”
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Detection and imaging of microcracking in complex media using coda wave interferometry (CWI) under linear resonance conditions by Toumi, S, Mechri, C, Bentahar, M, Boubenider, F, Guerjouma, R. El

“…This letter presents the development of ultrasonic coda wave interferometry to locate and image microcracks created within consolidated granular media, polymer…”
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Apport du couple echographie abdomino-pelvienne et radiographie thoracique dans le bilan etiologique des fievres recentes en milieu tropical : notre experience a la clinique chiva de nouakchott by Ould Beddi, M., Ould Mechri, C., Ould Aye, M., N’Gbesso, R.D.

“…Préciser l’apport de l’échographie associée la radiographie thoracique, dans le bilan des fièvres récentes, en identifiant leurs principales étiologies. Il…”
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