Publications

• REPORT

Existence results for the $A-\varphi$ magnetodynamic formulation of the Maxwell system

Serge Nicaise

The $A/\varphi$ magnetodynamic Maxwell system given in its potential and space/time formulation is a popular model considered in the engineering community. We establish exitence of strong solutions with the help of the theory of Showalter on degenerated parabolic problems; using energy estimates,…

2013. ⟨hal-00917597⟩

• ART

Sintering behavior and non-linear properties of ZnO varistors processed in microwave electric and magnetic fields at 2.45GHz

Alexandre Badev, Sylvain Marinel, Romain Heuguet, Etienne Savary, Dinesh Agrawal

A study of the densification behavior and grain growth mechanisms of ZnO-based varistors composed of 98 mol.% ZnO–2 mol.% (Bi2O3, Sb2O3, Co3O4, MnO2) has been carried out. The pressed samples were sintered in microwave electric (E) and magnetic (H) fields using a single-mode cavity of 2.45 GHz. The…

Acta Materialia, 2013, 61 (20), pp.7849-7858. ⟨10.1016/j.actamat.2013.09.023⟩. ⟨hal-02450338⟩

• COMM

On a new type of Pythagorean-Hodograph curves and their use in applications

Gudrun Albrecht

International Conference on Applied Mathematics and Informatics - ICAMI 2013, Nov 2013, San Andres Island, Colombia. ⟨hal-03156002⟩

• ART

Elaboration and characterization of a low frequency and wideband piezoceramic generator for energy harvesting

Mohamed Rguiti, A. Hajjaji, Sophie d'Astorg, Christian Courtois, Anne Leriche

The aim of this work was to efficiently convert the mechanical vibrations into electrical energy by using direct piezoelectric effect. Most mechanical vibrations occur at low frequencies varying from 50 to 120 Hz. As piezoelectric converters provide maximum energy conversion when their natural…

Optical Materials, 2013, 36 (1), pp.8-12. ⟨10.1016/j.optmat.2013.07.017⟩. ⟨hal-03033179⟩

• ART

Convergence analysis of an hp finite element method for singularly perturbed transmission problems in smooth domains

Serge Nicaise, Xenophontos Christos

We consider a two-dimensional singularly perturbed transmission problem with two different diffusion coefficients, in a domain with smooth (analytic) boundary. The solution will contain boundary layers only in the part of the domain where the diffusion coefficient is high and interface layers along…

Numerical Methods for Partial Differential Equations, 2013, 29 (6), pp.2107-2132. ⟨10.1002/num.21793⟩. ⟨hal-03212516⟩

• POSTER

Regularity results for elliptic problems with measure

Sadjiya Ariche, Colette De Coster, Serge Nicaise

In this work, we study the solution of the Laplace equation: \[ -\Delta u =g \delta_\sigma\;\;\;\hbox{ in } Q\subseteq \mathbb{R}^3, \] where \(\delta_\sigma\) is the Dirac mass on a crack \(\sigma\) of \(Q\) and \(g\in L^2(\sigma)\). First, we discuss the existence and the uniqueness of a solution…

Nord Pas-de-Calais/Belgium congress of mathematics, Oct 2013, Valenciennes, France. ⟨hal-03142664⟩

• COMM

Error estimation in the computation of induced currents of human body

T. Lelong, P. Thomas, C. Miry, I. Magne, Z. Tang, Yvonnick Le Menach, Francis Piriou, Riccardo Scorretti, Noël Burais, Emmanuel Creusé

CIGRE 3rd International Colloquium on Low Frequency Electric and Magnetic Fields (EMF-ELF-2013), Oct 2013, Nara, Japan. ⟨hal-00975877⟩

• COMM

Braided Geometry and its applications

Dimitri Gurevich

Conference "Frontiers and New Perspectives in Geometry and Physics", Oct 2013, Saint-Petersburg, Russia. ⟨hal-03155774⟩

• COMM

Geometric modeling of thick and closed surfaces : application to pelvic organs

Thierry Bay

Although surgery is often used to treat disorders coming from physiological changes in the spatial configuration of the pelvic organs, the process is poorly reproductible and controllable from one patient to another. The work described below consists in developping a realistic geometric modeling,…

19th IMACS World Congress, Aug 2013, San Lorenzo de El Escorial, Spain. ⟨hal-03132821⟩

• ART

Effect of some thermal treatments on interface adhesion toughness of various thick thermal spray coatings

Didier Chicot, G. Marot, P. Araujo, N. Horny, Arnaud Tricoteaux, M. Staia, J. Lesage

Surface Engineering, 2013, 22 (5), pp.390-398. ⟨10.1179/174329406X126690⟩. ⟨hal-03577788⟩