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Affichage de 1181 à 1190 sur 16094

  • Article dans une revue

Quantification and mitigation of the effect of resynchronization errors in ultrasound sensor network for passive imaging in elastic plates

Omar Bouchakour, Emmanuel Moulin, Lynda Chehami, Nikolay Smagin

The problem of signal desynchronization in passive imaging based on noise correlation for defect detection in elastic plates is investigated. Although a post-processing resynchronization process relying on the symmetry of noise correlation functions can be applied prior to the imaging algorithm,…

Journal of the Acoustical Society of America, 2024, 155 (5), pp.3283 - 3290. ⟨10.1121/10.0025986⟩. ⟨hal-04607244v2⟩

  • Article dans une revue

Neuromorphic Coincidence Detector for Interaural Time Difference Encoding and Sound DOA Estimation

Eugénie Dalmas, François Danneville, Michael Bocquet, Christophe Loyez

Eight decades ago, the medial superior olive (MSO) responsible for the extraction of the interaural time difference (ITD) was described as a combination of coincidence detection neurons and delay lines by Jeffress, a model largely used in spiking sound source localization systems. Coincidence…

IEEE Transactions on Instrumentation and Measurement, 2024, 73, pp.1-11. ⟨10.1109/TIM.2024.3460950⟩. ⟨hal-04770966⟩

  • Communication dans un congrès

Integrated twisted bilayer graphene photonic upconverter for D-Band wireless links

Alberto A. Montanaro, A. Boschi, Guillaume Ducournau, Vaidotas Mišeikis, S. Soresi, M.G.L. Frecassetti, P. Galli, Henri Happy, S. Pezzini, C. Coletti, Marco Romagnoli, V. Sorianello

We report a compact D-band graphene photonics-based upconverter at 140 GHz for next generation 6G networks. We show 10Gb/s QPSK and 4Gb/s 16QAM transmission exploiting ultra-broadband ( 180 GHz ) operation of CVD-grown large-angle twisted-bilayer-graphene.

Optical Fiber Communication Conference 2024, 2024, San Diego California, France. pp.Th3F.5, ⟨10.1364/OFC.2024.Th3F.5⟩. ⟨hal-04606529⟩

  • Article dans une revue

Broadband high-contrast-grating-type waveplates for the terahertz range

Surya Revanth Ayyagari, Andreas K Klein, Simonas Indrišiūnas, Vytautas Janonis, Daniil Pashnev, Abdu Subahan Mohammed, Guillaume Ducournau, Andreas Stöhr, Irmantas Kašalynas

The high-contrast-grating waveplates utilizing high contrast between silicon and air refractive indexes were developed in order to perform as a quarter wave and a half wave plate in the selected THz frequency range. The waveplates possessed anti-reflective properties due to the specific inclination…

Optics Express, 2024, Optics Express, 32 (9), pp.15870-15881. ⟨10.1364/oe.521532⟩. ⟨hal-04569540⟩

  • Article dans une revue

Combined Super-Resolution Fluorescence and Coaxial 3-D Scanning Microwave Microscopy: Proof-of-Concept In-Liquid Live-Cell Imaging: Toward a Biological Nano-Radar

Chia-Hung Lee, Kamel Haddadi, Peter Burke

We present a proof-of-concept 3-D scanning microwave microscope based on a miniaturized coaxial probe combined with high-resolution fluorescence microscopy for in-liquid operation and live-cell imaging. The system simulta- neously provides electric (GHz) and optical (super-resolution) imaging of…

IEEE Microwave and Wireless Technology Letters, 2024, pp.1-4. ⟨10.1109/LMWT.2024.3483071⟩. ⟨hal-04815101⟩

  • Article dans une revue

Single-Channel Imaging at Low Sampling Rates

Salah Skitioui, Cyril Decroze, Ettien Kpre, Christophe Gaquière, Okan Yurduseven, Thomas Fromenteze

This study introduces a method for single-channel imaging at low sampling rates, utilizing Frequency-Modulated Continuous Wave radar combined with space-frequency multiplexing. This approach significantly reduces system complexity and data acquisition demands by encoding scene reflectivity into a…

IEEE Antennas and Wireless Propagation Letters, 2024, pp.1-5. ⟨10.1109/LAWP.2024.3409195⟩. ⟨hal-04614410⟩

  • Article dans une revue

Oxidation-resistant Cu-based nanowire transparent electrodes activated by an exothermic reduction reaction

Anđela Križan, Laetitia Bardet, Kevin Zimny, Martin Romanus, Maxime Berthe, Christine Labrugère-Sarroste, Daniel Bellet, Mona Tréguer-Delapierre

This article describes an approach to making highly stable copper nanowire networks on any type of substrates. These nanostructured materials are highly sought after for, among other applications, the development of next-generation flexible electronics. Their high susceptibility to oxidation in air…

ACS Nano, 2024, 18 (51), pp.34902-34911. ⟨10.1021/acsnano.4c12698⟩. ⟨hal-04856986⟩

  • Article dans une revue

TileChain: A Blockchain-Based Framework for Security Service Management For Vehicular Communications

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

Vehicular communications have become essential for functional and road safety purposes due to the development of vehicle fleets. However, these communications have made vehicles more vulnerable to cyber-attacks. The security of data exchanges in vehicular networks currently relies on a centralized…

IEEE Transactions on Vehicular Technology, 2024, pp.1-17. ⟨10.1109/TVT.2024.3358784⟩. ⟨hal-04465353⟩

  • Article dans une revue

Simulation and optimization of GaAs1-xPx/Si1-yGey/Ge triple junction solar cells

A. Azzououm, A. Aissat, Jean-Pierre Vilcot

This paper focuses on studying and simulating a GaAs1-xPx/Si1-yGey/Ge triple-junction solar cell structure. First, the strain and the bandgap energy associated to the SiGe layer have been studied. The optimal germanium concentration is 0.88 with a strain around 0.45%. Then, the phosphor…

Journal of Ovonic Research, 2024, 20 (1), pp.75-84. ⟨10.15251/JOR.2024.201.75⟩. ⟨hal-04494462⟩

  • Article dans une revue

Advances in AI-Generated Images and Videos

Hessen Bougueffa Eutamene, Mamadou Keita, Wassim Hamidouche, Abdelmalik Taleb-Ahmed, Helena Liz-López, Alejandro Martín, David Camacho, Abdenour Hadid

In recent years generative AI models and tools have experienced a significant increase, especially techniques to generate synthetic multimedia content, such as images or videos. These methodologies present a wide range of possibilities; however, they can also present several risks that should be…

International Journal of Interactive Multimedia and Artificial Intelligence, 2024, 9 (1), pp.173-208, 1-36. ⟨10.9781/ijimai.2024.11.003⟩. ⟨hal-04856744⟩