Publications

• COMM

Helmholtz Equation in Highly Heterogeneous Media

Hélène Barucq, Henri Calandra, Théophile Chaumont-Frelet, Christian Gout

Helmholtz Equation in Highly Heterogeneous Media

Second Russian-French Workshop "Computational Geophysics", Sep 2014, Novosibirsk, Russia. ⟨hal-01100478⟩

• ART

Effects of microwave sintering on intrinsic defects concentrations in ZnO-based varistors

Faical Kharchouche, Etienne Savary, Anthony Thuault, Sylvain Marinel, Sophie d'Astorg, Mohamed Rguiti, Saâd Belkhiat, Christian Courtois, Anne Leriche

Nowadays the most important part of varistors is made from doped ZnO. The typical varistor microstructure consists in a large number of n–p–n junctions. ZnO grains are intrinsic n-type semiconductors because of the displacement of zinc atoms in interstitial positions and the formation of oxygen…

Ceramics International, 2014, 40 (8), pp.13697-13701. ⟨10.1016/j.ceramint.2014.04.142⟩. ⟨hal-02449721⟩

• ART

Stability results for second-order evolution equations with switching time-delay

Serge Nicaise, Cristina Pignotti

We consider second-order evolution equations in an abstract setting with intermittently delayed/not-delayed damping. We give sufficient conditions for asymptotic and exponential stability, improving and generalizing our previous results from Nicaise and Pignotti (Adv Differ Equ 17:879-902, 2012).…

Journal of Dynamics and Differential Equations, 2014, 26 (3), pp.781-803. ⟨10.1007/s10884-014-9382-1⟩. ⟨hal-03166065⟩

• UNDEFINED

Remark on stabilization of second order evolution equations by unbounded dynamic feedbacks and applications

Zainab Abbas, Kais Ammari, Denis Mercier

In this paper we consider second order evolution equations with unbounded dynamic feedbacks. Under a regularity assumption we show that observability properties for the undamped problem imply decay estimates for the damped problem. We consider both uniform and non uniform decay properties.

2014. ⟨hal-01022854⟩

• COMM

Helmholtz equation in Highly Heterogeneous Media

Hélène Barucq, Henri Calandra, Théophile Chaumont-Frelet, Christian Gout

11th World Congress on Computational Mechanics, Eccomas, Jul 2014, Barcelone, Spain. ⟨hal-01100492⟩

• COMM

Noncommutative Geometry on enveloping algebra and its applications to Physics

Dimitri Gurevich

XXXIII Max Born Symposium, Jul 2014, Wroclaw, Poland. ⟨hal-03155729⟩

• ART

Improvement in the predictivity of squeal simulations: Uncertainty and robustness

Thierry Tison, Arnaud Heussaff, Franck Massa, Isabelle Turpin, R.F. Nunes

The objective of this paper is to improve the predictivity of squeal simulations by introducing uncertainty and robustness concepts during simulations. Complex eigenvalue analysis is a traditional way to detect numerically the unstable modes that can be associated with extensive vibration and noise…

Journal of Sound and Vibration, 2014, 333 (15), pp.3394-3412. ⟨10.1016/j.jsv.2014.03.011⟩. ⟨hal-03184580⟩

• ART

Improvement of the hydroxyapatite mechanical properties by direct microwave sintering in single mode cavity

Anthony Thuault, Etienne Savary, Jean-Christophe Hornez, Gérard Moreau, Michel Descamps, S. Marinel, Anne Leriche

The main purpose of this study consists in investigating the direct microwave sintering of hydroxyapatite (HA) in a single mode cavity. Firstly, stoichiometric HA powders were synthesized by a coprecipitation method from diammonium phosphate and calcium nitrate solutions and shaped by slip-casting…

Journal of the European Ceramic Society, 2014, 34 (7), pp.1865-1871. ⟨10.1016/j.jeurceramsoc.2013.12.035⟩. ⟨hal-02449723⟩

• COMM

Radially symmetric solutions of an anisotropic mean curvature equation modeling the corneal shape

Chiara Corsato, Colette De Coster, P. Omari

AIMS Conference on Dynamical Systems, Differential Equations and Applications, American institute of mathematical sciences; Instituto de Ciencias Matemáticas (ICMAT), Jul 2014, Madrid, Spain. ⟨hal-03227738⟩

• COMM

Potentialities for aeronautics of the development of an active core PZT fibre

J.L. Petitniot, Aurélien Dolay, Christian Courtois, Mohamed Rguiti, Sophie d'Astorg

In a more less near future, aeronautics could largely use light morphing structures which can advantageously replace the classical heavy actuation able to improve aircraft agility. This breaking technology can be easily initially evaluated without risk on drones. Existing laminar actuators using…

ACTUATOR 2014, Jun 2014, Brême, Germany. ⟨hal-01068701⟩