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Affichage de 4061 à 4070 sur 16294

Article dans une revue

Nanomechanical modulation cavities of localized surface plasmon resonance with elastic whispering-gallery modes

Z. Oumekloul, M. Moutaouekkil, Gaëtan Lévêque, Abdelkrim Talbi, A. Mir, Abdellatif Akjouj

he dispersion of mechanical vibration limits nano-optomechanical modulation. In this work, we propose an optomechanical modulation exploiting elastic local resonances, also called whispering-gallery modes (WGMs). We find that our structure supports two quadripolar and two hexapolar elastic WGMs,...

Journal of Applied Physics, 2020, 127 (2), pp.023105. ⟨10.1063/1.5111819⟩. ⟨hal-03141821⟩

Article dans une revue

Proposal for an integrated silicon-photonics terahertz gas detector using photoacoustics

Mattias Verstuyft, Elias Akiki, Benjamin Walter, Marc Faucher, Jean-Francois Lampin, Mathias Vanwolleghem, Bart Kuyken

A design and multiphysical model is presented for an on-chip gas sensor that transduces terahertz gas absorption through sound generation into a mechanical motion that can be read out externally. The signal is triply enhanced by designing a structure that functions simultaneously as an optical, an...

Optics Express, 2020, 28 (15), pp.22424. ⟨10.1364/OE.397272⟩. ⟨hal-03065114⟩

Communication dans un congrès

Hierarchical large-scale elastic metamaterials as an innovative passive isolation strategy for seismic wave mitigation

N. Kherraz, M. Miniaci, F. Bosia, A.S. S Gliozzi, M. Onorato, N.M. M Pugno

Large scale elastic metamaterials as an innovative passive isolation strategy for seismic waves has recently attracted increasing interest in the scientific community. In this work, we investigate the feasibility of an innovative design based on hierarchical organization of the unit cell, i.e. a...

14th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials'2020, Sep 2020, New York City, NY, United States. pp.84-86, ⟨10.1109/Metamaterials49557.2020.9285161⟩. ⟨hal-03209110⟩

Communication dans un congrès

Inducing dispersion curves with negative group velocity in inertially amplified phononic crystals through the application of an external state of prestress

M. Miniaci, M. Mazzotti, A. Amendola, F. Fraternali

In this paper, we report about the effect of the application of a state of prestress on the band structure of a periodic phononic crystal characterized by an inertial amplification mechanism. Through a numerical example, we show the possibility of inducing negative group velocity in an isolated...

XI International Conference on Structural Dynamic, EURODYN 2020, Nov 2020, Athens, Greece. pp.612-620, ⟨10.47964/1120.9048.21611⟩. ⟨hal-03135962⟩

Article dans une revue

L'infini au cours des siècles

Stefano Giordano, Manon Benedito

The fascinating history of the concept of infinity is indissolubly associated with the development of religions, philosophies, mathematics and natural sciences. At the time of the first Greek philosophers, the infinity, or áperion, was a negative concept to be avoided in all rigorous statements....

K. Revue trans-européenne de philosophie et arts, 2020. ⟨hal-02947970⟩

Article dans une revue

Power-efficient reliable register file for aggressive-environment applications

Ihsen Alouani, Hamzeh Ahangari, Özcan Özturk, Smail Niar

In a context of increasing demands for on-board data processing, insuring reliability under reduced power budget is a serious design challenge for embedded system manufacturers. Particularly, embedded processors in aggressive environments need to be designed with error hardening as a primary goal,...

IET Computers & Digital Techniques, 2020, 14 (1), pp.1-8. ⟨10.1049/iet-cdt.2018.5047⟩. ⟨hal-03322796⟩

Communication dans un congrès

Eve, you shall not get access! A cyber-physical blockchain architecture for electronic toll collection security

Ahmed Didouh, Anthony Bahadir Lopez, Yassin El Hillali, Atika Rivenq, Mohammad Abdullah Al Faruque

Cooperative intelligent transportation system (C-ITS) applications are generally susceptible to position spoofing-dependent attacks such as Sybil and DDoS attacks due to a lack of established solutions. This paper presents a novel cyber-physical blockchain cryptographic architecture to help prevent...

23rd IEEE International Conference on Intelligent Transportation Systems, ITSC 2020, Sep 2020, Rhodes, Greece. pp.1-7, ⟨10.1109/ITSC45102.2020.9294334⟩. ⟨hal-03360239⟩

Communication dans un congrès

Development of High Frequency Interdigital Transducers for NDT of Thin Films

Tahar Kadi, Marc Duquennoy, Mohammadi Ouaftouh, Nikolay Smagin, Frédéric Jenot

Various engineering systems components suffer destructive effects on their surfaces, like wear, fatigue, or corrosion during their operation. Protecting the surface by hardening treatments or applying coatings is a widespread way to extend their life and improve the product quality. Important...

Forum Acusticum, Dec 2020, Lyon, France. pp.2653-2659, ⟨10.48465/fa.2020.0396⟩. ⟨hal-03242427⟩

Communication dans un congrès

Effect of substrate moisture content on sound absorption by green systems

Emmanuel Attal, Nicolas Côté, Takafumi Shimizu, Bertrand Dubus

Sound and noise reflections from acoustically rigid materials constituting buildings and roads contribute strongly to acoustic environment in urban areas. Building envelope greening which improves noticeably sound absorption, may be a solution for acoustic protection in cities when applied in a...

Forum Acusticum, Dec 2020, Lyon, France. pp.467-467, ⟨10.48465/fa.2020.0122⟩. ⟨hal-03233641⟩

Article dans une revue

Purification for Carbon Nanotubes Synthesized by Flame Fragments Deposition via Hydrogen Peroxide and Acetone

Asmaa Hammadi, Ahmed Jasim, Firas Abdulrazzak, Abdulkareem Al-Sammarraie, Yacine Cherifi, Rabah Boukherroub, Falah Hussein

Carbon nanotubes (CNTs) are synthesized by the flame fragment deposition (FFD) technique using Iraqi liquefied petroleum gas (LPG) as a source of carbon in a hand-made reactor at a low temperature (160 °C) without using a catalyst. Purification of the multi-walled carbon nanotubes (MWCNTs) is...

Materials, 2020, 13 (10), pp.2342. ⟨10.3390/ma13102342⟩. ⟨hal-03090032⟩