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Affichage de 151 à 160 sur 1013

  • Article dans une revue

Hermite interpolation by planar cubic-like ATPH, Interpolation de Hermite par des courbes ATPH pseudo-cubiques planes

Thierry Bay, Isabelle Cattiaux-Huillard, Laura Saini

This paper deals with the construction of the Algebraic Trigonometric Pythagorean Hodograph (ATPH) cubic-like Hermite interpolant. A characterization of solutions according to the tangents at both ends and a global free shape parameter α is performed. Since this degree of freedom can be used for…

Advances in Computational Mathematics, 2022, 48, ⟨10.1007/s10444-022-09978-8⟩. ⟨hal-03556981v2⟩

  • Article dans une revue

Influence of calcium substitution on structural, morphological and electrical conductivity properties of La1- xCaxNi0.5Ti0.5O3 (x = 0.0, x = 0.2) compounds for energy storage devices

Sirine Gharbi, Ahmadou Ly, Essebti Dhahri, Régis Barillé, Driss Lahem, Marc Debliquy, Mohamed Rguiti

This paper explores the effect of calcium insertion on the physicochemical properties of La1-xCaxNi0.5Ti0.5O3 (x = 0.0 (LNTO), x = 0.2 (LCNTO)) compounds fabricated by the sol–gel process. The samples crystallize in an orthorhombic distorted structure with the Pnma space group. The purity and…

Inorganic Chemistry Communications, 2022, 144, pp.109925. ⟨10.1016/j.inoche.2022.109925⟩. ⟨hal-04489910⟩

  • Article dans une revue

Water-Based Synthesis of Zr6-Based Metal–Organic Framework Nanocrystals with Sulfonate Functions: Structural Features and Application to Fructose Dehydration

Bakytzhan Yeskendir, Priscilla Magalhaes de Souza, Pardis Simon, Robert Wojcieszak, Christian Courtois, Yannick Lorgouilloux, Sebastien Royer, Jean-Philippe Dacquin, Jérémy Dhainaut

A series of zirconium-based metal−organic framework (MOF) nanocrystals (95−211 nm) displaying sulfonate functions (UiO-66-SO3H) was prepared in N,N-dimethylformamide (DMF) - the conventional solvent - and water, and their physicochemical properties were thoroughly investigated. In particular, X-ray…

ACS Applied Nano Materials, 2022, ACS Applied Nano Materials, ⟨10.1021/acsanm.2c02916⟩. ⟨hal-03794329⟩

  • Article dans une revue

An analysis of high-frequency Helmholtz problems in domains with conical points and their finite element discretization

Théophile Chaumont-Frelet, Serge Nicaise

We consider Helmholtz problems in three-dimensional domains featuring conincal points. We focus on the high-frequency regime and derive novel sharp upper-bounds for the stress intensity factors of the singularities associated with the conical points. We then employ these new estimates to analyse…

Computational Methods in Applied Mathematics, 2022, ⟨10.1515/cmam-2022-0126⟩. ⟨hal-04001691⟩

  • N°spécial de revue/special issue

De la sérendipité dans les projets et les activités en relation

Jean Vareille, Jean-Paul Bécar

L’article traite de la sérendipité dans les projets conduits dans nos IUT et les activités en relation avec eux. La sérendipité est la découverte accidentelle de quelque chose d’inattendu. Elle survient souvent lors du déroulement de projets. Forts de leurs expériences vécues dans les projets et…

Journal sur l'enseignement des sciences et technologies de l'information et des systèmes, 21, pp.2012, 2022, ⟨10.1051/j3ea/20222012⟩. ⟨hal-04678347⟩

  • Communication dans un congrès

Manufacturing methods of bioceramic scaffolds

Marie Lasgorceix, Anne Leriche

For many years, bone substitutes have been made from calcium phosphate powders because of their excellent biological properties. Different methods are used to manufacture scaffolds with a porous architecture that aims to approximate the natural bone skeleton. Several fabrication methods for…

BIOCERAMICS 32, Sep 2022, Venice, Italy. ⟨hal-04392004⟩

  • Communication dans un congrès

Shaping of complex ceramic parts using stereolithography and gel casting

Pierre Grimaud, Fabrice Petit, Laurent Boilet, Marie Lasgorceix, Florian Jean, Anne Leriche, Pascal Laurent, Shaan Chamary, Philippe Champagne

The “gel casting” is a process used for producing parts with complex geometries. It was initially developed to overcome the limitations of other shaping processes such as injection moulding or machining. Designed by Janney & Omatete [1] in 1991, this process is very versatile, both in terms of…

SHAPING 8, Sep 2022, Dübendorf, Switzerland. ⟨hal-04392052⟩

  • Communication dans un congrès

Shaping of ceramics by hybrid binder jetting

Enrique Juste, Qirong Chen, Marie Lasgorceix, Anne Leriche, Charles Duterte, Fabrice Petit

Additive manufacturing by binder jetting is becoming increasingly popular to process ceramics. This technology is not only highly productive but also all-material compatible and is one of the few truly "free form" additive processes. Unfortunately, it suffers from a series of limitations…

SHAPING 8, Sep 2022, Dübendorf, Switzerland. ⟨hal-04392051⟩

  • 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⟩

  • Pré-publication, Document de travail

Do Shape Memory Alloy cables restrain the vibrations of girder bridges? -A mathematical point of view

Virginie Régnier

We study the energy decay of a damped Euler-Bernoulli beam which is subject to a pointwise feedback force representing a Shape Memory Alloy (SMA) cable. The problem we consider is that of [13] but, for simplicity, our modelization does not take into account the additional stiffness term they…

2022. ⟨hal-03722113⟩