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Institution

École normale supérieure de Cachan

EducationCachan, Île-de-France, France
About: École normale supérieure de Cachan is a education organization based out in Cachan, Île-de-France, France. It is known for research contribution in the topics: Decidability & Finite element method. The organization has 2717 authors who have published 5585 publications receiving 175925 citations.


Papers
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Journal ArticleDOI
TL;DR: This work has obtained the first example of a self-organized monolayer (SOM) obtained using diazonium electroreduction, and it is an original way to obtain well-controlled and stable functionalized surfaces for potential applications related to the photophysical properties of the grafted chromophore.
Abstract: A new heteroleptic polypyridyle Ru(II) complex was synthesized and deposited on surface by the diazonium electroreduction process. It yields to the covalent grafting of a monolayer. The functionalized surface was characterized by XPS, electrochemistry, AFM, and STM. A precise organization of the molecules within the monolayer is observed with parallel linear stripes separated by a distance of 3.8 nm corresponding to the lateral size of the molecule. Such organization suggests a strong cooperative process in the deposition process. This strategy is an original way to obtain well-controlled and stable functionalized surfaces for potential applications related to the photophysical properties of the grafted chromophore. As an exciting result, it is the first example of a self-organized monolayer (SOM) obtained using diazonium electroreduction.

56 citations

Book ChapterDOI
01 Jan 1998
TL;DR: The work presented here goes along the research for the principles that allow to compute the nature and value of tolerances on each part of a mechanism, and is included in the formal description of the elements of tridimensional tolerance chains.
Abstract: The work presented here goes along the research for the principles that, starting from functional requirements, allow to compute the nature and value of tolerances on each part of a mechanism In comparison with AClement’s or JTurner’s works, our contribution is included in the formal description of the elements of tridimensional tolerance chains This approach is built upon two elements, a modelization of geometric errors and a method of computation for their propagation inside of a mechanism The modelization of geometric variations proposed here is founded upon the association of small displacement torsors to the different types of deviations that can be met in a mechanism From then on, determining the parts’ small displacements under the effect of deviations and of gaps of the parts in a mechanism, becomes a computation of the composition of the modelized geometric errors This computation of each part’s position yields two results First, the formal determination of the part’s position in the mechanism in relation with the chains of influent geometric variations influenced by the parts’ surfaces Then, the description of a combina- tory of a mechanism’s configurations The application of this method shows the results obtained as well as the possibilities of extension towards a tolerancing aiding tool

56 citations

Book ChapterDOI
08 Jul 2001
TL;DR: A class of tree automata that perform tests on a memory that is updated using function symbol application and projection is introduced and the language emptiness problem is shown to be in DEXPTIME.
Abstract: We introduce a class of tree automata that perform tests on a memory that is updated using function symbol application and projection. The language emptiness problem for this class of tree automata is shown to be in DEXPTIME. We also introduce a class of set constraints with equality tests and prove its decidability by completion techniques and a reduction to tree automata with one memory. Set constraints with equality tests may be used to decide secrecy for a class of cryptographic protocols that properly contains a class of memoryless "ping-pong protocols" introduced by Dolev and Yao.

56 citations

Journal ArticleDOI
TL;DR: In this article, a finite element model for reinforced-concrete (RC) structures is presented, which provides the details of the constitutive behavior of each constituent (concrete, steel and bond-slip), while keeping formally the same appearance as the classical finite-element model.
Abstract: In this work, we present a novel approach to the finite element modelling of reinforced-concrete (RC) structures that provides the details of the constitutive behavior of each constituent (concrete, steel and bond-slip), while keeping formally the same appearance as the classical finite element model. Each component constitutive behavior can be brought to fully non-linear range, where we can consider cracking (or localized failure) of concrete, the plastic yielding and failure of steel bars and bond-slip at concrete steel interface accounting for confining pressure effects. The standard finite element code architecture is preserved by using embedded discontinuity (ED-FEM) and extended (X-FEM) finite element strain representation for concrete and slip, respectively, along with the operator split solution method that separates the problem into computing the deformations of RC (with frozen slip) and the current value of the bond-slip. Several numerical examples are presented in order to illustrate very satisfying performance of the proposed methodology. Copyright © 2010 John Wiley & Sons, Ltd.

56 citations

Journal ArticleDOI
TL;DR: In this paper, a single bamboo-like boron nitride nanotube was used for imaging and spectroscopy experiments on a one-dimensional object, where the luminescence was located all along the nanotubes.

56 citations


Authors

Showing all 2722 results

NameH-indexPapersCitations
Shi Xue Dou122202874031
Olivier Hermine111102643779
John R. Reynolds10560750027
Shaul Mukamel95103040478
Tomás Torres8862528223
Ifor D. W. Samuel7460523151
Serge Abiteboul7327824576
Stéphane Roux6862719123
Zeger Debyser6740416531
Louis Nadjo6426412596
Praveen K. Thallapally6419012110
Andrew Travers6319313537
Shoji Takeuchi6369214704
Bineta Keita6327412053
Yves Mély6236813478
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20233
202222
202121
202029
201958
201879