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Affichage de 391 à 400 sur 16570

Article dans une revue

Pyrochlore nanomineralogy questions the immobility of niobium during tropical weathering

Quentin Bollaert, Mathieu Chassé, Nicolas Menguy, Corentin Le Guillou, Artur Bastos Neto, David Troadec, Laurence Galoisy, Georges Calas

The origin of the mobility of low-solubility elements such as niobium during supergene weathering remains elusive, despite growing evidence, especially in strongly weathered regolith. In the critical zone, the low mobility of these high field strength elements (HFSEs) is assigned to the resistance...

Geology, 2026, 54 (1), pp.92-96. ⟨10.1130/G53465.1⟩. ⟨hal-05433456⟩

Article dans une revue

Bioelectrical memory effects behind fractional-order transients emulating synaptic plasticity in brain-inspired electrochemical dendrites

Antoine Baron, Sébastien Pecqueur, Enrique Balaguera

Understanding and reproducing the brain’s ability to store and process information remains a central challenge in neuromorphic engineering. Here, we identify the physical origin and provide a phenomenological interpretation of memory effects underlying synaptic-like plasticity, realized in brain...

Electrochimica Acta, 2026, 571, pp.148961. ⟨10.1016/j.electacta.2026.148961⟩. ⟨hal-05607418⟩

Article dans une revue

Spectral and Energy Efficiency of Cell-Free Massive MIMO-OFDM Over Measured Urban Channels

Malek Abida, Eric P Simon, Davy P Gaillot, Rafik Zayani

Cell-free massive multiple-input multiple-output (CF-mMIMO) is a promising architecture for future sixth-generation (6G) wireless networks because cooperation among geographically distributed access points enables seamless connectivity, more uniform quality of service, and improved spectral and...

IEEE Open Journal of the Communications Society, 2026, 7, pp.11078-11097. ⟨10.1109/OJCOMS.2026.3729917⟩. ⟨hal-05789178⟩

Article dans une revue

Tensor-Based Modulation-Enabled Signaling for Massive Unsourced Random Access in Cell-Free Networks

Ala Baccar, Sofiane Kharbech, Alexis Decurninge, Joumana Farah, Eric Pierre Simon

This paper investigates the application of tensor-based modulation (TBM), an unsourced random access scheme, in a cell-free massive multiple-input multiple-output (MIMO) architecture. In this system, multiple access points (APs), connected to a central processing unit (CPU), collaboratively serve a...

IEEE Access, 2026, pp.1-1. ⟨10.1109/access.2026.3731346⟩. ⟨hal-05746871⟩

Pré-publication, Document de travail

Conflict-Aware Multimodal Fusion for Ambivalence and Hesitancy Recognition

Salah Eddine Bekhouche, Hichem Telli, Azeddine Benlamoudi, Salah Eddine Herrouz, Abdelmalik Taleb-Ahmed, Abdenour Hadid

Ambivalence and hesitancy (A/H) are subtle affective states where a person shows conflicting signals through different channels -- saying one thing while their face or voice tells another story. Recognising these states automatically is valuable in clinical settings, but it is hard for machines...

2026. ⟨hal-05596258⟩

Article dans une revue

Impact of iodine-induced nonplanarity on the vibrational and electronic properties of a triphenylene derivative: A combined experimental and DFT study, Influence de terminaisons iodées sur la non-planaréité et les propriétés vibrationnelles et électroniques de dérivés triphénylènes: une étude expérimentale et théorique

Ahmed Hewail, David Guérin, Christophe Krzeminski, Eric Faulques, Nataliya Kalashnyk

We present a molecular study combining Raman, infrared, and UV–visible absorption spectroscopy with density functional theory (DFT) calculations to investigate triphenylene and its iodinated derivative, 1,5,9-triiodotriphenylene. The results provide a detailed comparison of their vibrational and..., Des études à l'échelle moléculaire de spectroscopie Raman, infra-rouge et absorption UV-visible, basées sur des simulations en théorie de la fonctionnelle de la densité sur le triphénylène et le dérivé iodé 1,6,9 triiodotriphénylène. Les résultats donnent une comparaison précise des propriétés...

Journal of Molecular Structure, 2026, 1358, pp.145178. ⟨10.1016/j.molstruc.2025.145178⟩. ⟨hal-05476586v2⟩

Article dans une revue

Interface-engineered vanadium-tungsten nitride nanolaminate thin films for high-performance micro-supercapacitors

Khac Huy Dinh, Kevin Robert, Jérémie Chaillou, Lydia Karmazin, Isabelle Roch-Jeune, Chiara Crivello, Marielle Huvé, David Troadec, Christophe Lethien, Pascal Roussel

Multicationic nitrides are emerging as a new class of high-performance electrode materials for microsupercapacitors (MSCs), yet their synthesis and structural control remain challenging. Here, we report the fabrication of VWN nanolaminates using reactive magnetron sputtering deposition method. The...

Journal of Materiomics, 2026, 12 (5), pp.101280. ⟨10.1016/j.jmat.2026.101280⟩. ⟨hal-05706914⟩

Article dans une revue

Structural and electronic signatures of stacking and intralayer transitions in epitaxial bilayer WSe2 on GaP(111)B

Meryem Bouaziz, Samir El Masaoudi, Aymen Mahmoudi, Niels Chapuis, Mathieu Silly, Gilles Patriarche, Iann Gerber, Julien Chaste, Fabrice Oehler, Xavier Wallart, Abdelkarim Ouerghi

Two-dimensional materials from the transition metal dichalcogenides family host multiple crystal phases and stacking configurations that strongly affect their electronic properties. Here, we investigate the structural and electronic phase evolution of epitaxial bilayer WSe2 grown by molecular beam...

Nanoscale, 2026, 18 (26), pp.13969-13978. ⟨10.1039/d6nr01013j⟩. ⟨hal-05687513⟩

Communication dans un congrès

Towards an industrial lead-free ferroelectric KNN thin film for piezoelectric MEMS actuators

Lisa Legardinier, Brenda Carreno Jimenez, Sophie Ollivier, Valérie Demange, Christel Dieppedale, Florian Dupont, Denis Remiens, Brice Gautier, Maryline Guilloux-Viry, Gwenael Le Rhun, Grégoire Magagnin, Ngoc Kim Thanh Bui, Karim Dogheche

Despite the RoHS (Restriction of Hazardous Substances) directives regarding the use of lead in many electronic applications, introduced 20 years ago, lead zirconate titanate (PZT) remains the most widely used piezoelectric material in actuator devices in the absence of a suitable alternative at the...

ECAPD 2026, Jun 2026, Oulu, Finland. ⟨cea-05705327⟩

Chapitre d'ouvrage

Introduction to "Electromagnetic Interference Shielding Materials

Jovana Prekodravac Filipovic, Malgorzata Celuch, Kamel Haddadi, Dragana Marinković

The general availability of cellphones, wearable technology, Wi-Fi, microwaves, and various smart gadgets has become fundamental to contemporary existence. This book examines (nano)materials, promoting advancements in shielding materials. It examines the features, behavior, properties, and spectra...

Introduction to "Electromagnetic Interference Shielding Materials". Electromagnetic Interference Shielding Materials, Elsevier, pp.1-2, 2026, ⟨10.1016/B978-0-443-36630-7.00009-0⟩. ⟨hal-05719728⟩