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Affichage de 291 à 300 sur 596

Article dans une revue

Bio-inspired hydroxyapatite dual core-shell structure for bone substitutes

Shaan Chamary, D. Hautcoeur, Jean-Christophe Hornez, Anne Leriche, Francis Cambier

A variety of processing methods has been developed and optimized to generate porous bio-ceramic structures close to that of the natural bone. Two different ceramic processing techniques were combined in order to generate a bio-inspired structure similar, in terms of composition and architecture, to...

Journal of the European Ceramic Society, 2017, 37 (16), pp.5321-5327. ⟨10.1016/j.jeurceramsoc.2017.05.043⟩. ⟨hal-03079738⟩

Article dans une revue

From homotopy perturbation technique to reduced order model for multiparametric modal analysis of large finite element models

Franck Massa, Isabelle Massa-Turpin, Thierry Tison

The paper focuses on the definition of a reduced order model for linear modal analysis. The aim is to supply a suitable mathematical alternative tool compatible for multiparametric analysis of large finite element model considering numerous variable parameters, numerous mode shapes and significant...

Mechanical Systems and Signal Processing, 2017, 96, pp.291-302. ⟨10.1016/j.ymssp.2017.04.025⟩. ⟨hal-03359283⟩

Article dans une revue

Four-dimensional contact CR-submanifolds in S7(1)

Mirjana Djorić, Marian Ioan Munteanu, Luc Vrancken

The analogue of CR -submanifolds in (almost) Kählerian manifolds is the concept of contact CR -submanifolds in Sasakian manifolds. These are submanifolds for which the structure vector field ξ is tangent to the submanifold and for which the tangent bundle of M can be decomposed as T(M)=H(M)⊕E(M)⊕Rξ...

Mathematical News / Mathematische Nachrichten, 2017, 290 (16), pp.2585-2596. ⟨10.1002/mana.201600437⟩. ⟨hal-03148573⟩

Article dans une revue

A novel anatomical ceramic root canal simulator for endodontic training

Lieven Robberecht, F. Chai, Marion Dehurtevent, Pierre Marchandise, T. Bécavin, Jean-Christophe Hornez, Etienne Deveaux

Introduction Endodontic therapy is often complicated and technically demanding. The aim of this study was to develop a reproducible biomimetic root canal model for pre-clinical and postgraduate endodontic training. Material and Methods A specific ceramic shaping technique (3D printing and slip...

European Journal of Dental Education, 2017, 21 (4), pp.e1-e6. ⟨10.1111/eje.12207⟩. ⟨hal-03079712⟩

Article dans une revue

Planar Pythagorean-Hodograph B-Spline curves

Gudrun Albrecht, Carolina Vittoria Beccari, Jean-Charles Canonne, Lucia Romani

We introduce a new class of planar Pythagorean-Hodograph (PH) B-Spline curves. They can be seen as a generalization of the well-known class of planar Pythagorean-Hodograph (PH) Bézier curves, presented by R. Farouki and T. Sakkalis in 1990, including the latter ones as special cases. Pythagorean-...

Computer Aided Geometric Design, 2017, 57, pp.57-77. ⟨10.1016/j.cagd.2017.09.001⟩. ⟨hal-03234857⟩

Article dans une revue

Structural, dielectric and piezoelectric study of Ca-, Zr-modified BaTiO3 lead-free ceramics

H Msouni, Amina Tachafine, M El Aatmani, Didier Fasquelle, Jean-Claude Carru, M El Hammioui, Mohamed Rguiti, A Zegzouti, A Outzourhit, M Daoud

We prepared a lead-free ceramic (Ba0.85 Ca0.15)(Ti1−x Zrx )O3 (BCTZ) using the conventional mixed oxide technique. The samples were prepared by an ordinary mixing and sintering technique. In this study we investigated how small amounts of Zr 4+ can affect the crystal structure and microstructure as...

Bulletin of Materials Science, 2017, 40 (5), pp.925-931. ⟨10.1007/s12034-017-1445-6⟩. ⟨hal-04280961⟩

Article dans une revue

Classification of the Locally Strongly Convex Centroaffine Hypersurfaces with Parallel Cubic Form

Xiuxiu Cheng, Zejun Hu, Marilena Moruz

In this paper, we study locally strongly convex centroaffine hypersurfaces with parallel cubic form with respect to the Levi–Civita connection of the centroaffine metric. As the main result, we obtain a complete classification of such centroaffine hypersurfaces. The result of this paper is a...

Results in mathematics = Resultate der Mathematik, 2017, 72 (1-2), pp.419-469. ⟨10.1007/s00025-017-0651-2⟩. ⟨hal-03233934⟩

Article dans une revue

On shrinkage and structure changes of pure and blended Portland concretes

Yao Zhang, Catherine A. Davy, Grégory Tricot, Cyrille Albert-Mercier, Natacha Henry, Pieter Bertier, Fréderic Cazaux, Denis Damidot, Xavier Bourbon

This research investigates the long-term shrinkage and Relative Mass Loss (RML) of mature Portland concretes (pure CEMI and blended CEMV/A), at temperatures of 20°C and 80°C. When placed at 80°C and at relative humidities (RH) below 50-60%, concrete shrinkage increases with very slow stabilization...

Journal of the American Ceramic Society, 2017, 100 (9), pp.4131 - 4152. ⟨10.1111/jace.14915⟩. ⟨hal-01593370⟩

Article dans une revue

Optimization of PZT ceramic IDT sensors for health monitoring of structures

Rafatou Takpara, Marc Duquennoy, Mohammadi Ouaftouh, Christian Courtois, Frédéric Jenot, Mohamed Rguiti

Surface acoustic waves (SAW) are particularly suited to effectively monitoring and characterizing structural surfaces (condition of the surface, coating, thin layer, micro-cracks…) as their energy is localized on the surface, within approximately one wavelength. Conventionally, in non-destructive...

Ultrasonics, 2017, 79, pp.96-104. ⟨10.1016/j.ultras.2017.04.007⟩. ⟨hal-03080493⟩

Article dans une revue

Molecular Chemistry and Engineering of Boron-Modified Polyorganosilazanes as New Processable and Functional SiBCN Precursors

Antoine Viard, Diane Fonblanc, Marion Schmidt, Abhijeet Lale, Chrystelle Salameh, Anne Soleilhavoup, Mélanie Wynn, Philippe Champagne, Sophie Cerneaux, Florence Babonneau, Georges Chollon, Fabrice Rossignol, Christel Gervais, Samuel Bernard

A series of boron-modified polyorganosilazanes was synthesized from a poly(vinylmethyl-co-methyl)silazane and controlled amounts of borane dimethyl sulfide. The role of the chemistry behind their synthesis has been studied in detail by using solid-state NMR spectroscopy, FTIR spectroscopy, and...

Chemistry - A European Journal, 2017, 23 (38), pp.9076 - 9090. ⟨10.1002/chem.201700623⟩. ⟨hal-01670294⟩