Publicaciones

Affichage de 3521 à 3530 sur 16058

ART

Surface spin magnetism controls the polarized exciton emission from CdSe nanoplatelets

Elena V Shornikova, Aleksandr A Golovatenko, Dmitri R Yakovlev, Anna V Rodina, Louis Biadala, Gang Qiang, Alexis Kuntzmann, Michel Nasilowski, Benoit Dubertret, Anatolii Polovitsyn, Iwan Moreels, Manfred Bayer

The surface of nominally diamagnetic colloidal CdSe nanoplatelets can demonstrate para-magnetism owing to the uncompensated spins of dangling bonds (DBSs). We reveal that by optical spectroscopy in high magnetic fields up to 15 Tesla using the exciton spin as probe of the surface magnetism. The...

Nature Nanotechnology, 2020, 15, pp.277-282. ⟨10.1038/s41565-019-0631-7⟩. ⟨hal-02394926⟩

ART

Unravelling local environments in mixed TiO2–SiO2 thin films by XPS and ab initio calculations

Pavel Ondračka, David Nečas, Michèle Carette, Stéphane Elisabeth, David Holec, Agnès A. Granier, Antoine Goullet, Lenka Zajíčková, Mireille Richard-Plouet

Mixed TixSi1−xO2 oxide can exhibit a partial phase separation of the TiO2 and SiO2 phases at the atomic level. The quantification of TiO2-SiO2 mixing in the amorphous material is complicated and was so far done mostly by infrared spectroscopy. We developed a new approach to the fitting of X-ray...

Applied Surface Science, 2020, 510, pp.145056. ⟨10.1016/j.apsusc.2019.145056⟩. ⟨hal-02507953⟩

ART

Temperature compensated magnetic field sensor based on Love waves

Harshad Mishra, Jérémy Streque, Michel Hehn, Prince Mengue, Hamid M'Jahed, Daniel Lacour, Karine Dumesnil, S. Petit-Watelot, Sergei Zhgoon, Vincent Polewczyk, Aurélien Mazzamurro, Abdelkrim Talbi, Sami Hage-Ali, Omar Elmazria

A temperature compensated magnetic field sensor based on the combination of CoFeB ferromagnetic thin films and Quartz/ZnO Love waveguide platform is developed and optimized. The Love wave is a shear horizontal guided wave and therefore provides an optimal interaction with magnetisation in the...

Smart Materials and Structures, 2020, 29 (4), pp.045036. ⟨10.1088/1361-665X/ab7857⟩. ⟨hal-02865495⟩

COMM

Emulation of various radio access technologies for zero on site testing in the railway domain - the Emulradio4rail platforms

Marion Berbineau, Juan Moreno, Sofiane Kharbech, Ying Yang, Alessandro Vizzari, Raul Torrego, José Soler, Laurent Clavier, Rédha Kassi, Franco Mazzenga, Romeo Giuliano, Val Inaki, Christophe Gransart, Virginie Deniau, Yann Cocheril, Kristina Svensson, Armano Carillo

In order to assess the reliability, availability, and maintainability of wireless links for the rail sector in the laboratory, it is necessary to develop measurement platforms able to emulate real railway radio environments. This type of testing platform should combine very new approaches, the so-...

8th Transport Research Arena, TRA 2020, Apr 2020, Helsinki, Finland. 9 p. ⟨hal-03343233⟩

COMM

Cross-Layer CNN Approximations for Hardware Implementation

Karim Mohamed Abedallah Ali, Ihsen Alouani, Abdessamad Ait El Cadi, Hamza Ouarnoughi, Smail Niar

Convolution Neural Networks (CNNs) are widely used for image classification and object detection applications. The deployment of these architectures in embedded applications is a great challenge. This challenge arises from CNNs’ high computation complexity that is required to be implemented on...

ARC 2020 : Applied Reconfigurable Computing, Apr 2020, Toldedo (Virtual Event), Spain. pp.151-165, ⟨10.1007/978-3-030-44534-8_12⟩. ⟨hal-03430302⟩

ART

Giant Magnetoelastic Coupling in a Love Acoustic Waveguide Based on TbCo 2 /FeCo Nanostructured Film on ST-Cut Quartz

Aurélien Mazzamurro, Yannick Dusch, Philippe Pernod, Olivier Bou Matar, Ahmed Addad, Abdelkrim Talbi, Nicolas Tiercelin

In this work, we propose a theoretical and experimental investigation of the interaction of guided pure shear horizontal (SH) wave within a uniaxial multilayered TbCo2/FeCo thin film deposited on Quartz ST-90°X cut in a delay line configuration. We evaluate theoretically the evolution of phase...

Physical Review Applied, 2020, 13 (4), ⟨10.1103/PhysRevApplied.13.044001⟩. ⟨hal-02946150⟩

UNDEFINED

Experimental Evidence for Heavy Tailed Interference in the IoT

Laurent Clavier, Troels Pedersen, Ignacio Rodriguez, Mads Lauridsen, Malcolm Egan

5G and beyond sees an ever increasing density of connected things. As not all devices are coordinated, there are limited opportunities to mitigate interference. As such, it is crucial to characterize the interference in order to understand its impact on coding, waveform and receiver design. While a...

2020. ⟨hal-02521928⟩

ART

OLIMP: a heterogeneous multimodal dataset for advanced environment perception

Amira Mimouna, Ihsen Alouani, Anouar Ben Khalifa, Yassin El Hillali, Abdelmalik Taleb-Ahmed, Atika Rivenq, Abdeldjalil Ouahabi, Najoua Essoukri Ben Amara

A reliable environment perception is a crucial task for autonomous driving, especially in dense traffic areas. Recent improvements and breakthroughs in scene understanding for intelligent transportation systems are mainly based on deep learning and the fusion of different modalities. In this...

Electronics, 2020, 9 (4), pp.560. ⟨10.3390/electronics9040560⟩. ⟨hal-03140627⟩

THESE

Design and production of Gallium Nitride based anti-pollution gas sensors for automotive applications, Conception et réalisation de capteurs de gaz antipollution à base de Nitrure de Gallium pour application automobile

Hassane Ouazzani Chahdi

Le nitrure de gallium (GaN) est un semi-conducteur à large bande interdite ayant des propriétés physiques exceptionnelles. C’est un matériau très convoité pour la réalisation de dispositifs en électronique de puissance RF ou de commutation, en plus de pouvoir être fonctionnel à haute température....

Engineering Sciences [physics]. Université de Sherbrooke; Université de Lille, 2020. English. ⟨NNT : ⟩. ⟨tel-03872852⟩

COUV

Radio channel access challenges in LoRa low-power wide-area networks

Cong-Duc Pham, Ahcène Bounceur, Laurent Clavier, Umber Noreen, Muhammad Ehsan

Recently, Low-Power Wide Area Networks (LPWAN) play a key role in the Internet-of-Things (IoT) maturation process. Under the LPWAN broad term are a variety of technologies enabling power efficient wireless communication over very long distances. For instance, technologies based on ultra-narrow band...

LPWAN Technologies for IoT and M2M Applications, Elsevier, pp.65-102, 2020, ⟨10.1016/B978-0-12-818880-4.00004-1⟩. ⟨hal-02514183⟩