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Affichage de 1181 à 1190 sur 16131

Article dans une revue

A new metric for the comparison of permittivity models in terahertz time-domain spectroscopy

Mélanie Lavancier, Nabil Vindas-Yassine, Juliette Vlieghe, Theo Hannotte, François Orieux, Romain Peretti

We present a robust method, as well as a new metric, for the comparison of permittivity models in terahertz timedomain spectroscopy (THz-TDS). In this work, we perform an extensive noise analysis of a THz-TDS system, we remove and model the unwanted deterministic noises and implement them into our...

IEEE Transactions on Terahertz Science and Technology, In press, pp.1-10. ⟨10.1109/TTHZ.2024.3431202⟩. ⟨hal-04485089v2⟩

Article dans une revue

Self-sustained optomechanical state destruction triggered by the Kerr nonlinearity

A Delattre, I Golokolenov, R Pedurand, Xin Zhou, A Fefferman, E Collin

Cavity optomechanics implements a unique platform where moving objects can be probed by quantum fields, either laser light or microwave signals. With a pump tone driving at a frequency above the cavity resonance, self-sustained oscillations can be triggered at large injected powers. These limit...

Physical Review Research, 2024, 6 (4), pp.043038. ⟨10.1103/PhysRevResearch.6.043038⟩. ⟨hal-04523212⟩

Article dans une revue

Interdigitated-comb piezoelectric phononic crystals for innovative SAW devices

R. Alcorta Galván, C. Croënne, B. Dubus, E. Eustache, A. Ngabonziza, A.-C. Hladky-Hennion

In this paper, piezoelectric phononic crystals made up of interdigitated combs in floating potential condition are studied. Calculation of the dispersion curves shows that, in addition to Bragg bandgaps due to the presence of periodic electrodes, supplementary bandgaps are present corresponding to...

Applied Physics Letters, 2024, 125 (12), pp.121703. ⟨10.1063/5.0222994⟩. ⟨hal-04738331⟩

Communication dans un congrès

Secure Transmission in NOMA Systems: An Efficient Resource Allocation Strategy Using Deep Learning

Miled Alam, Abdul Karim Gizzini, Laurent Clavier

Deep learning (DL) algorithms have been widely integrated in various aspects of wireless communications research. In this paper, we investigate, in an Internet of Things context, the secrecy energy-efficiency (SEE) of a multi-user downlink non-orthogonal multiple access (NOMA) system in the...

IEEE Conference on Standards for Communications and Networking (CSCN), Nov 2024, Belgrade, Serbia. pp.73-78, ⟨10.1109/CSCN63874.2024.10849738⟩. ⟨hal-04916314⟩

Article dans une revue

In situ growth of N-doped carbon nanotubes from the products of graphitic carbon nitride etching by nickel nanoparticles

Mariusz Pietrowski, Emilia Alwin, Michał Zieliński, Sabine Szunerits, Agata Suchora, Robert Wojcieszak

The in situ growth of N-doped multi-walled carbon nanotubes (N-MWCNTs) from the products of graphitic carbon nitride (g-C$_3$N$_4$) etching by Ni nanoparticles in a hydrogen atmosphere has been confirmed for the first time. During the etching process of g-C$_3$N$_4$, the building blocks, notably...

Nanoscale Advances, 2024, 6, pp.1720-1726. ⟨10.1039/D3NA00983A⟩. ⟨hal-04500515⟩

Article dans une revue

Influence of critical micelle concentration of choline-based long chain fatty acid soaps on their antibacterial activity against Methicillin resistant Staphylococcus aureus

Helena Arellano, Tomasz Swebocki, Clémence Le Coeur, Sylvain Prévost, Marwan Abdallah, Véronique Nardello-Rataj, Anne-Laure Fameau

Hypothesis: Antimicrobial resistance (AMR) is a pressing global health concern. ESKAPEE pathogens, such as Methicillin-resistant Staphylococcus aureus (MRSA) are notable of concern in healthcare settings due to their resistance to critical antibiotics. To combat AMR, the development of alternatives...

Journal of Colloid and Interface Science, 2024, 677, pp.314-323. ⟨10.1016/j.jcis.2024.07.218⟩. ⟨hal-04672571⟩

Article dans une revue

Investigation of the motif activity of transcription regulators in pancreatic β-like cell subpopulations differentiated from human induced pluripotent stem cells

Eric Leclerc, Mikhail Pachkov, Lisa Morisseau, Fumiya Tokito, Cecile Legallais, Rachid Jellali, Masaki Nishikawa, Amar Abderrahmani, Yasuyuki Sakai

Pancreatic β-cells are composed of different subtypes that play a key role in the control of insulin secretion and thereby control glucose homeostasis. In vitro differentiation of human induced pluripotent stem cells (hiPSCs) into 3D spheroids leads to the generation of β-cell subtypes and thus to...

Molecular Omics, 2024, ⟨10.1039/D4MO00082J⟩. ⟨hal-04787625⟩

Article dans une revue

On the Performance of a Photonic Reconfigurable Electromagnetic Band Gap Antenna Array for 5G Applications

Taha A Elwi, Fatma Taher, Bal S Virdee, Mohammad Alibakhshikenari, Ignacio J Garcia Zuazola, Astrit Krasniqi, Amna Shibib Kamel, Nurhan Türker Tokan, Salahuddin Khan, Naser Ojaroudi Parchin, Patrizia Livreri, Iyad Dayoub, Giovanni Pau, Sonia Aïssa, Ernesto Limiti, Mohamed Fathy Abo Sree

In this paper, a reconfigurable Multiple-Input Multiple-Output (MIMO) antenna array is presented for 5G portable devices. The proposed array consists of four radiating elements and an Elec- tromagnetic Band Gap (EBG) structure. Planar monopole radiating elements are employed in the array with...

IEEE Access, 2024, 12, pp.60849 - 60862. ⟨10.1109/access.2024.3392368⟩. ⟨hal-04569351⟩

Article dans une revue

Optimizing Connectivity: DVB-RCS2 Uplink to GEO Satellites via Optical Wireless Communication

Meryem Romaissa Djellouli, Sid Ahmed Chouakri, Abdelkrim Ghaz, Abdelmalik Taleb-Ahmed

This research focuses on the integration of an opto-satellite system based on Free Space Optical Communication (OWC) within DVB-RCS2 chains, implementing 16-QAM modulation techniques and Optical Time Division Wavelength Multiplexing (OTDMWDM). A co-simulation framework combining the MATLAB and...

Progress In Electromagnetics Research C, 2024, 150, pp.135-144. ⟨10.2528/PIERC24100601⟩. ⟨hal-04839773⟩

Article dans une revue

Autonomous radar interference detection and mitigation using neural network and signal decomposition

Dayat Kurniawan, Budiman Putra Asmaur Rohman, Ratna Indrawijaya, Chaeriah Bin Ali Wael, Suyoto Suyoto, Purwoko Adhi, Iman Firmansyah

Autonomous radar interference is a challenging problem in autonomous vehicle systems. Interference signals can decrease the signal-to-interference-noise ratio (SINR), and this condition decreases the performance detection of autonomous radar. This paper exploits a neural network and signal...

IAES International Journal of Artificial Intelligence (IJ-AI), 2024, 13 (3), pp.2854-2861. ⟨10.11591/ijai.v13.i3.pp2854-2861⟩. ⟨hal-04673052⟩