Publications

• Article dans une revue

Les MOOC, des compétences venues d’ailleurs

Jean-Charles Canonne, Laurent Vermeiren, Benjamin Alexandre

Magazine VU, 2015, 9. ⟨hal-03132980⟩

• Communication dans un congrès

Linearization of algebraic structures via functor calculus

Manfred Hartl

As the result of a long optimization process in categorical algebra, the notion of semi-abelian category allows for developing highly non-trivial algebraic theory in a very general framework which encompasses almost all algebraic structures usually studied, and even certain types of objects having…

International Conference on Combinatorial and Toric Homotopy, Aug 2015, Singapore, Singapore. ⟨hal-03177629⟩

• Proceedings/Recueil des communications

Optimized finite difference coefficients for the Helmholtz equation

Mamadou N'Diaye, Russel J. Hewett, Andreas Atle, Henri Calandra

Summary Optimized finite difference (OFD) coefficients are often used to minimize numerical dispersion and to improve accuracy in finite difference (FD) solutions to partial differential equations (Lele (1992); Tam and Webb (1993); Jo et al. (1996); Liu and Sen (2010); Štekl and Pratt (1998)). We…

SEG Technical Program Expanded Abstracts 2015, Oct 2015, New Orleans, France. pp.3744-3748, 2015, ⟨10.1190/segam2015-5827540.1⟩. ⟨hal-05743747⟩

• Communication dans un congrès

Derivatives in Noncommutative calculus and deformation property of quantum algebras.

Dimitri Gurevich

The aim of my talk is twofold. First, I introduce analogs of (partial) derivatives on certain Noncommutative algebras, including some enveloping algebras and their ”braided versions”. Second, I discuss deformation property of some quantum algebras and show that contrary to a commonly held view the…

International Workshop "Supersymmetries and Quantum Symmetries", Aug 2015, Dubna, Russia. ⟨hal-03156053⟩

• Article dans une revue

Bounding matrix functionals via partial global block Lanczos decomposition

Mohammed Bellalij, Lothar Reichel, G. Rodriguez, Hassane Sadok

Approximations of expressions of the form If:=trace(WTf(A)W), where A∈Rm×m is a large symmetric matrix, W∈Rm×k with k≪m, and f is a function, can be computed without evaluating f(A) by applying a few steps of the global block Lanczos method to A with initial block-vector W. This yields a partial…

Applied Numerical Mathematics: an IMACS journal, 2015, 94, pp.127-139. ⟨10.1016/j.apnum.2015.02.004⟩. ⟨hal-03135535⟩

• Communication dans un congrès

Development of flexible SAW sensors for non-destructive testing of structure

Rafatou Takpara, Marc Duquennoy, Christian Courtois, Maurice Gonon, Mohammadi Ouaftouh, Gregory Martic, Mohamed Rguiti, Frédéric Jenot, Laurent Seronveaux, Christine Pelegris

42nd Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2015, Jul 2015, Minneapolis, United States. ⟨hal-03586624⟩

• Pré-publication, Document de travail

Non uniform stability for the Timoshenko beam with tip load

Denis Mercier, Virginie Régnier

In this paper we consider a hybrid elastic model consisting of a Timoshenko beam and a tip load at the free end of the beam. Under the equal speed wave propagation condition, we show polynomial decay for the model which includes the rotary inertia of the tip load when feedback boundary moment and…

2015. ⟨hal-01170359⟩

• Article dans une revue

Classes réalisables d'extensions non abéliennes de degré p3

Maya Farhat, Bouchaïb Sodaïgui

Soient k un corps de nombres et Ok son anneau d'entiers. Soit p un nombre premier impair. Soit Γ un groupe non abélien d'ordre p3. Soient M un Ok-ordre maximal dans l'algèbre semi-simple k[Γ] contenant Ok[Γ], et Cl(M) le groupe des classes des M-modules localement libres. On définit…, Let k be a number field and its ring of integers. Let p be an odd prime number. Let Γ be a non-abelian group of order . Let be a maximal -order in the semi-simple algebra containing , and let be its locally free classgroup. We define the set of realizable classes to be the set of classes such that…

Journal of Number Theory, 2015, 152, pp.55-89. ⟨10.1016/j.jnt.2014.12.010⟩. ⟨hal-03149637⟩

• Article dans une revue

A Comparison of 1D Analytical Model and 3D Finite Element Analysis with Experiments for a Rosen-Type Piezoelectric Transformer

Faiza Boukazouha, Guylaine Poulin-Vittrant, Louis Pascal Tran-Huu-Hue, Maxime Bavencoffe, F. Boubenider, Mohamed Rguiti, Marc Lethiecq

This article is dedicated to the study of Piezoelectric Transformers (PTs), which offer promising solutions to the increasing need for integrated power electronics modules within autonomous systems. The advantages offered by such transformers include: immunity to electromagnetic disturbances; ease…

Ultrasonics, 2015, 60, pp.41-50. ⟨10.1016/j.ultras.2015.02.008⟩. ⟨hal-01814877⟩

• Article dans une revue

Crystal structure of alluaudite-type NaMg3(HPO4)2(PO4)

Ahmed Ould Saleck, Abderrazzak Assani, Mohamed Saadi, Cyrille Albert-Mercier, Claudine Follet-Houttemane, Lahcen El Ammari

The title compound, sodium trimagnesium bis­(hydrogen phosphate) phosphate, was obtained under hydro­thermal conditions. In the crystal, two types of [MgO6] octa­hedra, one with point group symmetry 2, share edges to build chains extending parallel to [10-1]. These chains are linked together by two…

Acta crystallographica Section E : Crystallographic communications [2015-..], 2015, 71 (7), pp.813-815. ⟨10.1107/S205698901501155X⟩. ⟨hal-03116322⟩