Publicaciones

• Article dans une revue

MAGNETIC BERNSTEIN INEQUALITIES AND SPECTRAL INEQUALITY ON THICK SETS FOR THE LANDAU OPERATOR

Paul Pfeiffer, Matthias Täufer

<div><p>We prove a spectral inequality for the Landau operator. This means that for all f in the spectral subspace corresponding to energies up to E, the L 2 -integral over suitable S ⊂ R 2 can be lower bounded by an explicit constant times the L 2 -norm of f itself. We identify the...

SIAM Journal on Control and Optimization, 2025, 63 (4), pp.2659-2685. ⟨10.1137/24M1681744⟩. ⟨hal-05033935⟩

• Article dans une revue

Covariance parameter estimation of Gaussian processes with approximated functional inputs

Lucas Reding, Andrés F. López-Lopera, François Bachoc

Journal of Multivariate Analysis, 2025, 205, pp.105380. ⟨10.1016/j.jmva.2024.105380⟩. ⟨hal-04844122⟩

• Article dans une revue

Faber-Krahn inequality for the heat content on quantum graphs via random walk expansion

Patrizio Bifulco, Matthias Täufer

We study the heat content on quantum graphs and investigate whether an analogon of the Rayleigh-Faber-Krahn inequality holds. This means that heat content at time $T$ among graphs of equal volume would be maximized by intervals (the graph analogon of balls as in the classic Rayleigh-Faber-Krahn...

Electronic Journal of Probability, 2025, 30 (none), ⟨10.48550/arXiv.2501.09693⟩. ⟨hal-05138408⟩

• Article dans une revue

Method for Connection of Two G2 Data Sets by the Use of a Quintic Rational Bézier Curve Defined with Mass Control Points

Lionel Garnier, Jean-Paul Bécar, Laurent Fuchs

<div><p>The paper deals with the G 2 continuity or planar curves. The G 2 continuity is considered as a superior quality o curvature, which is oten sought ater in high-precision designs and industrial applications. It ensures a perectly smooth transition between dierent parts o a...

WSEAS Transactions on Mathematics, 2024, 23, pp.948 - 961. ⟨10.37394/23206.2024.23.98⟩. ⟨hal-04917172⟩

• Article dans une revue

Geography of bilinearized Legendrian contact homology

Frédéric Bourgeois, Damien Galant

We study the geography of bilinearized Legendrian contact homology for closed, connected Legendrian submanifolds with vanishing Maslov class in 1-jet spaces. We show that this invariant detects whether the two augmentations used to define it are DGA homotopic or not. We describe a collection of...

Algebraic and Geometric Topology, 2024, 24 (7), pp.3571-3604. ⟨10.2140/agt.2024.24.3571⟩. ⟨hal-03842142⟩

• Article dans une revue

Poly(Amino Acid) LbL Multilayers With Embedded Silver and Copper Oxide Nanoparticles as Biocompatible Antibacterial Coatings

Ana‐marija Milisav, Lamborghini Sotelo, Cristina Cantallops-Vilà, Tommaso Fontanot, Ina Erceg, Krunoslav Bojanić, Tomislav Vuletić, Željka Fiket, Maja Ivanić, Silke Christiansen, Edwige Meurice, Maja Dutour Sikirić

Abstract The growing concern over implant‐associated infections motivates the development of novel antibacterial coatings for medical devices as an effective strategy in reducing the occurrence of IAI. Polyelectrolyte multilayers (PEMs) incorporating metal/metal oxide nanoparticles (NPs) as...

Advanced Materials Interfaces, 2024, 12 (5), ⟨10.1002/admi.202400631⟩. ⟨hal-05582396⟩

• Article dans une revue

EXPLICIT FORMULAS FOR CALCULATING THE NORMAL FORM OF ZERO-HOPF BIFURCATION IN A CLASS OF NEUTRAL DIFFERENTIAL EQUATIONS

Houssem Achouri, Chaouki Aouiti

Journal of Mathematical Sciences, 2024, ⟨10.1007/s10958-024-07400-w⟩. ⟨hal-04951733⟩

• Article dans une revue

Control of the preferentially orientated growth of Sr2TiSi2O8 crystals in a SrO – TiO2 – SiO2 – Al2O3 – K2O parent glass

Oussama Zwein, Marie-Sophie Renoirt, Maurice Gonon, Nicolas Preux, Sandra Abdelouhab, Rıdvan Yildiz, Marc Duquennoy

A polar glass-ceramic containing Sr-fresnoite Sr2TiSi2O8 (STS) as single crystalline phase was developed through the controlled crystallization of a parent glass composition containing SrO, TiO2, SiO2, K2O, and Al2O3. The objective of this work is to obtain a piezoelectric substrate exhibiting a...

Journal of Non-Crystalline Solids, 2024, 641, pp.123132. ⟨10.1016/j.jnoncrysol.2024.123132⟩. ⟨hal-04664713⟩

• Article dans une revue

Advanced Refinement of Geopolymer Composites for Enhanced 3D Printing via In-Depth Rheological Insights

Abrar Gasmi, Christine Pélegris, Ralph Davidovits, Mohamed Guessasma, Hugues Tortajada, Florian Jean

The advancement of 3D printing technology has been remarkable, yet the quality of printed prototypes heavily relies on the rheological behavior of the materials used. This study focuses on optimizing geopolymer-based composite formulas to achieve high-quality 3D printing, with particular attention...

Ceramics, 2024, 7 (4), pp.1316-1339. ⟨10.3390/ceramics7040087⟩. ⟨hal-04717760⟩

• Article dans une revue

Influence of the Electrical Test Setup on the Voltage Gain Measurement of an Unloaded Rosen-Type Piezoelectric Transformer Vibrating in the First Three Modes

Faiza Boukazouha, Hamza Barkat, Abdesselam Rouabha, Abderahim Herbadji, Mohamed Rguiti

Abstract In recent years, Piezoelectric Transformers (PTs) have become a great success due to their excellent properties, especially in applications requiring high voltage. The Rosen-type PT is well known for this performance, as its voltage gain at the resonant frequency can reach few thousands....

Measurement Science Review, 2024, 24 (4), pp.137-144. ⟨10.2478/msr-2024-0019⟩. ⟨hal-05690266⟩