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Article dans une revue

Stability results of locally coupled wave equations with local Kelvin-Voigt damping: Cases when the supports of damping and coupling coefficients are disjoint

Mohammad Akil, Haidar Badawi, Serge Nicaise

In this paper, we study the direct/indirect stability of locally coupled wave equations with local Kelvin-Voigt dampings/damping, where we assume that the supports of the dampings and the coupling coefficients are disjoint. First, we prove the well-posedness, strong stability, and polynomial…

Computational & Applied Mathematics, 2022, 41 (6), 21 p. ⟨10.1007/s40314-022-01956-6⟩. ⟨hal-04346878⟩

Article dans une revue

Novel Portland cement matrices incorporating a gamma -MnO2 /Ag2O hydrogen/tritium getter -structure changes and trapping performance

Sandy Lanier, Catherine Davy, Cyrille Albert-Mercier, Oriane Farcy, Céline Cau Dit Coumes, David Lambertin

This study investigates novel Portland cement-based mortars, developed for hydrogen/tritium trapping and radioactive waste immobilization. They incorporate a γ-MnO2/Ag2O getter powder at 10% wt (i.e. 6.8 to 7.1% vol). Compared to former patented materials, no drying or heat treatment of the…

Journal of Nuclear Materials, 2022, Journal of Nuclear Materials, 567, pp.153819. ⟨10.1016/j.jnucmat.2022.153819⟩. ⟨hal-04044334⟩

Article dans une revue

Morphological, structural, electrical, and piezoelectric analysis of hydrothermally grown ZnO nanowires on various substrates

Abderrahmane Hamdi, Ahmad Hamieh, Mervat Alamri, Karim Dogheche, M.M. Saj Mohan, Rachel Desfeux, Denis Remiens, El Hadj Dogheche

In this present work, we have successfully fabricated a piezoelectric structure based on ZnO nanowires (ZnO NWs) using a simple, low cost and environmentally friendly hydrothermal method. This structure forms the basis to fabricate vertically integrated nanogenerator device. This paper attempts to…

Surfaces and Interfaces, 2022, 31, 12 p. ⟨10.1016/j.surfin.2022.102103⟩. ⟨hal-03694897⟩

Article dans une revue

Mechanical and optical properties of MgAl2O4 ceramics and ballistic efficiency of spinel based armour

Caroline Gajdowski, Raffaele d'Elia, Norbert Faderl, Judith Böhmler, Yannick Lorgouilloux, Sébastien Lemonnier, Anne Leriche

This study was devoted to the understanding of the influence of MgAl2O4 ceramic properties on their ballistic performances. By modifying the processing parameters, ceramics with different microstructures were obtained. Among them, a transparent MgAl2O4 spinel with an in-line transmission between 77…

Ceramics International, 2022, 48 (13), pp.18199-18211. ⟨10.1016/j.ceramint.2022.03.079⟩. ⟨hal-03850557⟩

Article dans une revue

Modeling and electromechanical performance analysis of polyvinylidene difluoride/textile‐system for energy harvesting from the human body toward a novel class of self‐powered sensors

Meriem Boutaldat, Nabil Chakhchaoui, Adil Eddiai, Mounir Meddad, Omar Cherkaoui, Mohamed Rguiti, M'Hamed Mazroui

Because batteries' ability to power portable and wireless devices is limited, a great deal of research has been conducted on energy harvesting technology as a self-power source for portable devices. Harvesting mechanical energy from human motion is an attractive approach to obtaining green and…

Polymers for Advanced Technologies, 2022, ⟨10.1002/pat.5773⟩. ⟨hal-03703077⟩

Article dans une revue

Investigating Potential Effects of Ultra-Short Laser-Textured Porous Poly-ε-Caprolactone Scaffolds on Bacterial Adhesion and Bone Cell Metabolism

Emil Filipov, Liliya Angelova, Sanjana Vig, Maria Helena Fernandes, Gérard Moreau, Marie Lasgorceix, Ivan Buchvarov, Albena Daskalova

Developing antimicrobial surfaces that combat implant-associated infections while promoting host cell response is a key strategy for improving current therapies for orthopaedic injuries. In this paper, we present the application of ultra-short laser irradiation for patterning the surface of a 3D…

Polymers, 2022, 14 (12), pp.2382. ⟨10.3390/polym14122382⟩. ⟨hal-03889917⟩

Article dans une revue

Young Ceramists in the Spotlight

Erkka Frankberg, Andraž Kojcan, Marie Lasgorceix, Antonia Ressler, Nicolas Somers, Laura Katariina Tianien, María Canillas Pérez

The Young Ceramists Network (YCN) was established by the European Ceramic Society (ECerS) to build a platform to promote the networking between young researchers and professionals that are active in the ceramic-related fields worldwide from academia to the industrial sector. With the help of the…

Open Ceramics, 2022, 10, 1 p. ⟨10.1016/j.oceram.2022.100271⟩. ⟨hal-04313364⟩

Article dans une revue

Study of structural, impedance spectroscopy and dielectric properties of Li and Al co-doped Ba0.85Ca0.15Ti0.9Zr0.1O3 ceramics

Naima Zidi, Ahcène Chaouchi, Mohamed Rguiti, Yannick Lorgouilloux, Christian Courtois

In this work, we investigate the effect of lithium and aluminium co-doping (0, 0.1, 0.2, and 0.3 mol%) on the phase formation, microstructure, dielectric, and electrical properties of (Ba0.85Ca0.15) (Ti0.90Zr0.10)O3 ceramics prepared by solid state reaction method. Rietveld refinement of X-ray…

Journal of Materials Science: Materials in Electronics, 2022, 33 (18), pp.14468-14487. ⟨10.1007/s10854-022-08369-5⟩. ⟨hal-03703115⟩

Article dans une revue

Sequential construction and dimension reduction of Gaussian processes under constraints

François Bachoc, Andrés F. López-Lopera, Olivier Roustant

Accounting for inequality constraints, such as boundedness, monotonicity or convexity, is challenging when modeling costly-to-evaluate black box functions. In this regard, finite-dimensional Gaussian process (GP) regression models bring a valuable solution, as they guarantee that the inequality…

SIAM Journal on Mathematics of Data Science, 2022, 4 (2), pp.772-800. ⟨10.1137/21M1407513⟩. ⟨hal-03614303⟩

Article dans une revue

Role of polarization signals effects of electrostrictive polymers in the energy harvesting

A. Benbella, I. Matrane, A. Eddiai, M. Meddad, M. Rguiti, M. Mazroui

In the last decades, research into the electrostrictive ploymers as promising materials for energy harvesting using its ability to convert mechanical to electrical energy is beginning to reveal its potential for this application. These materials exhibit a strong electro-mechanical coupling and are…

Materials Today: Proceedings, 2022, ⟨10.1016/j.matpr.2022.05.474⟩. ⟨hal-03703102⟩