Publications

• Pré-publication, Document de travail

MULTIPLE SOLUTIONS AND SIMULATIONS FOR AN ION FLOW FIELD PROBLEM APPLIED TO HVDC TRANSMISSION LINES

Madeline Chauvier, Serge Nicaise, Christophe Troestler, Juliette Venel

This paper initiates a mathematical investigation of a PDE model for the transport of high voltage direct current via overhead lines. We prove the existence of infinitely many solutions, give necessary conditions for existence, explicitly compute the continuum of all radial solutions, and develop a…

2025. ⟨hal-05357732⟩

• Article dans une revue

On the spectrum of infinite quantum graphs

Marco Düfel, James Kennedy, Delio Mugnolo, Marvin Plümer, Matthias Täufer

Analysis and Mathematical Physics, 2025, 15 (6), pp.134. ⟨10.1007/s13324-025-01131-0⟩. ⟨hal-05661460⟩

• Thèse

Investigating the Cold Sintering Process of Bioactive Materials, Étude du processus de frittage à froid des matériaux bioactifs

Muthusundar Kumar

The cold sintering process (CSP) is a non-conventional sintering technique that densifies ceramic materials using a transient liquid phase under applied pressure, typically at low temperatures (< 300 °C). This processing window enables co-sintering of ceramic–polymer phases and offers unique…, Le processus de frittage à froid (CSP) est une technique de frittage non conventionnelle qui densifie les matériaux céramiques à l'aide d'une phase liquide transitoire sous pression appliquée, généralement à basse température (< 300 °C). Cette fenêtre de traitement permet le co-…

Bioengineering. Université Polytechnique Hauts-de-France; Université de Mons (Belgique), 2025. English. ⟨NNT : 2025UPHF0028⟩. ⟨tel-05471636⟩

• Communication dans un congrès

Additive manufacturing preparation of catalyst supports for the conversion of bio-sourced molecules

Meryem Mounaj, Yannick Lorgouilloux, Florian Jean, Jérémy Dhainaut, Christian Courtois

NETPORE 2025, Sep 2025, Tarragona, Spain. ⟨hal-05537653⟩

• Article dans une revue

Carleman-Based Reconstruction Algorithm on a wave Network

Lucie Baudouin, Maya de Buhan, Emmanuelle Crépeau, Julie Valein

In the context of a network of vibrating strings, modelled by interconnected linear partial differential equations, we are interested in the reconstruction of a zeroth order term of each one-dimensional wave equation involved, using some appropriate external boundary measurements. More precisely,…

Mathematics of Control, Signals, and Systems, 2025, 37, pp.621-660. ⟨10.1007/s00498-025-00413-z⟩. ⟨hal-04361363⟩

• Communication dans un congrès

Elaboration and characterization of new bioactive glasses doped with Cu, used in bone regenerative surgery

A. Bachar, A. Mabrouk, C. Follet, C. Mercier, Edwige Meurice, Wafa Mihoubi, Franck Bouchart, Halima El Bouami

XIX th ECerS Conference / CERAMICS 2025 / 100th DKG Annual Meeting, Aug 2025, Dresden (GERMANY), Germany. ⟨hal-05538562⟩

• Article dans une revue

Estimation of the asymptotic variance matrix of the least squares estimator of weak FARIMA models

Yacouba Boubacar Mainassara, Youssef Esstafa

In this article, we propose a consistent estimator for the asymptotic variance matrix of the least squares estimator in Fractionally AutoRegressive Integrated Moving‐Average (FARIMA) models. Our approach allows for error terms that are uncorrelated, but not necessarily independent. Modified…

Statistica Neerlandica, 2025, 79 (3), ⟨10.1111/stan.70009⟩. ⟨hal-05531048⟩

• Article dans une revue

Hydrothermal Synthesis and Structural Characterization of a New Lead Tri-magnesium Phosphate PbMg3(HPO4)(PO4)2

Ahmed Ould Saleck, Cyrille Albert-Mercier, Claudine Follet-Houttemane, Abderrazzak Assani, Lahcen El Ammari, Mohamed Saadi

A new lead tri-magnesium phosphate PbMg3(HPO4)(PO4)2 was synthesized by hydrothermal method and characterized by single crystal X-ray diffraction.

Journal of Chemical Crystallography, 2025, 55 (4), pp.259-266. ⟨10.1007/s10870-025-01056-3⟩. ⟨hal-05538269⟩

• Article dans une revue

Smart piezoelectric energy harvesting: how topology-optimized cavities boost performance in BaTiO 3 multilayer structures

Najoua Fangachi, Mohamed Rguiti, Madiha Yessari, Abdelowahed Hajjaji

Abstract The escalating global energy demand and environmental challenges underscore the urgent need for efficient, sustainable energy-harvesting solutions. In this study, we present a lead-free multilayer piezoelectric energy harvester, termed Arcade Sensor A, fabricated from BaTiO 3 ceramics and…

Smart Materials and Structures, 2025, 34 (8), pp.085001. ⟨10.1088/1361-665X/adf423⟩. ⟨hal-05687801⟩

• Article dans une revue

Improving mechanical stability of SBA-15 monoliths prepared from polymeric scaffolds replication using bentonite clay

Ridvan Yildiz, Jérémy Dhainaut, Carmen Ciotonea, Jean-Philippe Dacquin, Sébastien Royer, Christian Courtois, Yannick Lorgouilloux

The preparation of porous yet mechanically stable centimetric monoliths remains challenging using traditional methods. Herein, hierarchical SBA-15-based porous monoliths, with three levels of porosity (micro- and mesopores from the pores arrangement of the silica structure, and macropores from the…

Journal of Porous Materials, 2025, 32 (4), pp.1561-1569. ⟨10.1007/s10934-025-01791-0⟩. ⟨hal-05676447⟩