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Article dans une revue

Eco-innovative approach to phosphate waste recovery: Toward a flexible piezoelectric composite film for energy harvesting

Salesabil Labihi, Youssef Esshouba, Mohamed Aymen Ben Achour, Mohamed Rguiti, Mounir El Achaby, Adil Eddiai

With the increasing demand for sustainable energy solutions and the urgent need to reduce reliance on conventional piezoelectric materials, the development of lightweight, flexible, and environmentally friendly piezoelectric composites has emerged as a key research focus in energy harvesting…

Ceramics International, 2026, 52 (4), pp.5050-5062. ⟨10.1016/j.ceramint.2025.12.279⟩. ⟨hal-05687786⟩

Article dans une revue

Experimental and DFT study of the structural, electronic, and thermoelectrical properties of Li3xLa2/3-xTiO3 (x = 0.125) ceramic leads free for battery applications

Hicham Kacimi-Naciri, Meriem Ben Zennou, Assia Mabrouk, Amine El Azizi, Mohamed Loutou, Mohammed Mansori, Rachid Amrousse, Nadia Faska, Ahmed Bachar

We synthesized Li3xLa2/3−xTiO3 (LLTO, x = 0.125) via solid-state sintering, yielding a structurally stable orthorhombic perovskite with high environmental compatibility. The resulting material was characterized experimentally through X-ray diffraction (XRD), dielectric measurements (permittivity…

Next Materials, 2026, 11, pp.101619. ⟨10.1016/j.nxmate.2026.101619⟩. ⟨hal-05488643⟩

Article dans une revue

Optimization of explicit RKN schemes to minimize spurious reflections from shock wave propagation on non-uniform grids

Emmanuel Creusé, Mamadou N'Diaye, Juliette Venel, Cédric Hubert, Nicolas Leconte

The propagation of shock waves on non-uniform grids appears, for example, in some impact problems of the fast dynamics type, where a finer mesh can typically be employed in regions of interest, leading to mesh ratios that can range from 10 to 20 or even more. Unfortunately, unwanted spurious…

International Journal for Numerical Methods in Engineering, 2026, 127 (1). ⟨hal-05144415v2⟩

Pré-publication, Document de travail

OPTIMAL SPECTRAL INEQUALITY FOR THE HIGHER-DIMENSIONAL LANDAU OPERATOR

Sedef Özcan, Matthias Täufer

We prove optimal spectral inequalities for Landau operators in full space and in arbitrary dimension. Spectral inequalities are lower bounds on the L 2 -mass of functions in spectral subspaces of finite energy when integrated over a sampling set S ⊂ R d . Landau operators are Schrödinger operators…

2026. ⟨hal-05438797⟩

Article dans une revue

An BD-entropy inequality preserving Finite Volume scheme for the Quantum Navier-Stokes system

Caterina Calgaro, Robin Colombier, Emmanuel Creusé

In this work, we propose a Finite-Volume scheme on cartesian grids for the numerical approximation of some solutions of the Quantum Navier-Stokes (QNS) equations. An augmented formulation is implemented by introducing an additional drift velocity v, which reduces the third-order quantum operator to…

SMAI Journal of Computational Mathematics, 2026, 12 (43-73). ⟨hal-04837772v2⟩

Article dans une revue

Block-Additive Gaussian Processes under Monotonicity Constraints

Mathis Deronzier, Andrés F. López-Lopera, François Bachoc, Olivier Roustant, Jérémy Rohmer

We generalize the additive constrained Gaussian process framework to handle interactions between input variables while enforcing monotonicity constraints everywhere on the input space. The block-additive structure of the model is particularly suitable in the presence of interactions, while…

Statistics and Computing, 2026, 36 (1), pp.42. ⟨10.1007/s11222-025-10791-8⟩. ⟨hal-05441153⟩

Pré-publication, Document de travail

Mathematical modeling of iron oxidation in aqueous environment: when kinetics meets thermodynamics

Christian Bataillon, Clément Cancès, Claire Chainais-Hillairet, Federica Raimondi, Juliette Venel

We propose a one-dimensional model for the evolution at mesoscopic scale of a magnetite/maghemite oxide layer at the surface of iron metal set in an aqueous environment. The model takes into account the convection and diffusion of three charge carriers -iron cations, electrons in the conduction…

2026. ⟨hal-05563753⟩

HDR

Contributions théoriques et numériques à l'étude d'inclusions différentielles et d'équations aux dérivées partielles, Theoretical and Numerical Contributions to the Study of Differential Inclusions and Partial Differential Equations

Juliette Venel

Ce manuscrit est dédié à l'étude théorique et numérique de problèmes prenant la forme d'inclusions différentielles ou d'équations aux dérivées partielles. Le premier chapitre propose un résumé court de mes contributions avant d'en développer certaines dans la suite du mémoire.…, This manuscript is devoted to the theoretical and numerical study of problems formulated as differential inclusions or partial differential equations. The first chapter describes my contributions, some of which are then developed in detail in the rest of the manuscript. The second chapter addresses…

Equations aux dérivées partielles [math.AP]. Université Polytechnique Hauts-de-France, 2025. ⟨tel-05525952⟩

Thèse

Engineering of Antimicrobial Peptides Against Osteoarticular Infections, Développement de peptides antimicrobiens contre les infections ostéoarticulaires

Cristina Cantallops Vilà

Osteoarticular infections pose a major clinical challenge, often impairing bone healing and implant success. With up to 2 % of implants failing due to bacterial contamination—leading to poor outcomes, 11 % mortality, and high healthcare costs—there is an urgent need for biomaterials that prevent…, Les infections ostéoarticulaires représentent un défi clinique majeur, compromettant souvent la cicatrisation osseuse et le succès des implants. Jusqu’à 2 % des implants échouent en raison de contaminations bactériennes, entraînant des évolutions cliniques défavorables, un taux de mortalité moyen…

Rhumatology and musculoskeletal system. Université Polytechnique Hauts-de-France; Institut national des sciences appliquées Hauts-de-France, 2025. English. ⟨NNT : 2025UPHF0021⟩. ⟨tel-05528194⟩

Article dans une revue

Des mathématiques comme en l'an 500 : découvrir les suites numériques dans l'Institution Arithmétique de Boèce

Francois Goichot

Dans l’histoire des mathématiques, Boèce est l’un des très rares noms qui s’insèrent entre l’antiquité grecque et l’essor arabe, dans ce haut Moyen Âge qu’on voit souvent comme une période sombre pour la science. Nous proposons quelques éclairages sur les mathématiques de Boèce, telles que nous les…

Repères IREM, 2025, 140, p. 5-21. ⟨hal-05664221⟩