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Affichage de 1221 à 1230 sur 16279

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

FT-IR detection of DMMP on TiO 2 -Modified Porous Silicon Substrates

Warda Raiah, M. Guendouz, Parastesh Pirasteh, Vincent Thomy, Joël Charrier, Yannick Coffinier

In this study, we present a new chemical sensor based on a functionalized porous silicon and sensitive to dimethyl methyl phosphonate (DMMP), a simulant of sarin gas, known as one of the most toxic warfare agents. The porous silicon was prepared by anodising a boron-doped p-Si (100) wafer. A metal...

Materials Today Chemistry, 2024, 42, pp.102363. ⟨10.1016/j.mtchem.2024.102363⟩. ⟨hal-04774473v2⟩

Article dans une revue

Tunable topologically protected waveguiding in auxetic nonlinear metamaterials

M. Morvaridi, F. Bosia, M. Brun, V.F. Dal Poggetto, A.S. Gliozzi, M. Miniaci, C. Croenne, N.M. Pugno, G. Carta

In this paper, we discuss the possibility of achieving tunable topologically protected edge modes through the application of uniaxial prestrain in an auxetic metamaterial. The proposed structure consists of a thin slab with oriented cuts in a hexagonal lattice, where topologically protected band...

Physical Review Applied, 2024, 21 (3), pp.034024. ⟨10.1103/PhysRevApplied.21.034024⟩. ⟨hal-04526207⟩

Communication dans un congrès

500 GHz operational bandwidth MUTC-photodiodes with milliwatt terahertz output power levels

Ezgi Abacıoğlu, Marcel Grzeslo, Tom Neerfeld, Abdu Subahan Mohammed, J L F Estévez, Guillaume Ducournau, Andreas Stöhr

We present waveguide-integrated 1.55 μm InP-based modified uni-travelling-carrier photodiodes (MUTC-PDs) featuring coplanar waveguide outputs. The fabricated photodiodes yield an operational bandwidth of 500 GHz and milliwatt output power levels in the lower THz domain.

49th European Conference on Optical Communications (ECOC 2023), Oct 2023, Hybrid Conference, Glasgow, United Kingdom. pp.1410 - 1413, ⟨10.1049/icp.2023.2572⟩. ⟨hal-04695657⟩

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

A Tight-Binding Model for Illustrating Exciton Confinement in Semiconductor Nanocrystals

Z. Hens, Christophe Delerue

The Brus equation describes the relation between the lowest energy of an electron–hole pair and the size of a semiconductor crystallite. However, taking the strong confinement regime as a starting point, the equation does not cover the transition from weak to strong confinement, the accompanying...

The Journal of Chemical Physics, 2024, 160 (11), pp.114106. ⟨10.1063/5.0192031⟩. ⟨hal-04513566⟩

Communication dans un congrès

Enabling Low-Power Signature Recognition for the IoT with SLIF neurons

Guillaume Marthe, Claire Goursaud, Laurent Clavier

Energy constraints are still a significant challenge in numerous IoT applications, particularly due to the excessive power consumption of microcontrollers. To overcome this limitation, novel circuit designs have been introduced, with the integration of spiking neurons and analog computing emerging...

EUSIPCO 2024 - 32nd European conference on signal processing, Aug 2024, Lyon, France. pp.1-5. ⟨hal-04788239⟩

Article dans une revue

Transcriptomic profiling analysis of the effect of palmitic acid on 3D spheroids of β-like cells derived from induced pluripotent stem cells

Lisa Morisseau, Fumiya Tokito, Mathilde Lucas, Stéphane Poulain, Soo Hyeon Kim, Valérie Plaisance, Valérie Pawlowski, C. Legallais, Rachid Jellali, Yasuyuki Sakai, Amar Abderrahmani, Eric Leclerc

Type 2 diabetes (T2D) is posing a serious public health concern with a considerable impact on human life and health expenditures worldwide. The disease develops when insulin plasma level is insufficient for coping insulin resistance, caused by the decline of pancreatic β-cell function and mass. In...

Gene, 2024, 917, pp.148441. ⟨10.1016/j.gene.2024.148441⟩. ⟨hal-04608624⟩

Article dans une revue

[Review] Enhancing paracellular and transcellular permeability using nanotechnological approaches for the treatment of brain and retinal diseases

Asmaa Khalil, Alexandre Barras, Rabah Boukherroub, Ching-Li Tseng, David Devos, Thierry Burnouf, Winfried Neuhaus, Sabine Szunerits

Paracellular permeability across epithelial and endothelial cells is, in large part, regulated by apical intercellular junctions also referred to as tight junctions (TJs). These junctions contribute to the spatial definition of different tissue compartments within organisms, separating them from...

Nanoscale Horizons, 2024, 9 (1), pp.14-43. ⟨10.1039/D3NH00306J⟩. ⟨hal-04271375⟩

Communication dans un congrès

Detection and imaging of BVIDs in composite plates

Pierre Goislot, Guillemette Ribay, Emmanuel Moulin, Lynda Chehami

Composite materials are increasingly used in the aerospace industry. However, they may be subjected to Barely Visible Impact Damages (BVIDs). BVIDs can occur during maintenance phases or during flight and are almost impossible to detect with the naked eye. Although very small, these defects greatly...

Anglo-French Physical Acoustics Conference 2024, Jan 2024, Loch Lomond, United Kingdom. pp.24. ⟨cea-04976108⟩