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292 results on '"Lochon, P"'

1. Supercharacters of discrete algebra groups

Author

André, Carlos A. M. and Lochon, Jocelyn

Subjects
Mathematics - Representation Theory, Mathematics - Group Theory
Abstract

The concept of a supercharacter theory of a finite group was introduced by Diaconis and Isaacs as an alternative to the usual irreducible character theory, and exemplified with a particular construction in the case of finite algebra groups. We extend this construction to arbitrary countable discrete algebra groups, where superclasses and indecomposable supercharacters play the role of conjugacy classes and indecomposable characters, respectively. Our construction can be understood as a cruder version of Kirillov's orbit method and a generalisation of Diaconis and Isaacs construction for finite algebra groups. However, we adopt an ergodic theoretical point of view. The theory is then illustrated with the characterisation of the standard supercharacters of the group of upper unitriangular matrices over an algebraic closed field of prime characteristic.

Published
2021

2. Near-Infrared Dual-Band LSPR Coupling in Oriented Assembly of Doped Metal Oxide Nanocrystal Platelets

Author

Cleret de Langavant, Capucine, Oh, Jisoo, Lochon, Florian, Tusseau-Nenez, Sandrine, Ponsinet, Virginie, Baron, Alexandre, Gacoin, Thierry, and Kim, Jongwook

Abstract

Coupling effects of localized surface plasmon resonance (LSPR) represent an efficient means to tune the plasmonic modes and to enhance the near-field. While LSPR coupling in metal nanoparticles has been extensively explored, limited attention has been given to heavily doped semiconductor nanocrystals. Here, we investigate the LSPR coupling behavior of Cs-doped tungsten oxide (CsxWO3−δ) nanocrystal platelets as they undergo an oriented assembly into parallel stacks. The oriented assembly was achieved by lowering the dispersion stability of the colloidal nanoplatelets, of which the basal surface was selectively ligand-functionalized. This assembly induces simultaneous blue-shifts and red-shifts of dual-mode LSPR peaks without compromising the intensity and quality factor. This stands in contrast to the significant damping, broadening, and overall red-shift of the LSPR observed in random assemblies. Computational simulations successfully replicate the experimental observations, affirming the potential of this coupling phenomenon of near-infrared dual-mode LSPR in diverse applications including solar energy, bio-optics, imaging, and telecommunications.

Published
2024
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3. Population pharmacokinetics of peritoneal, plasma ultrafiltrated and protein-bound oxaliplatin concentrations in patients with disseminated peritoneal cancer after intraperitoneal hyperthermic chemoperfusion of oxaliplatin following cytoreductive surgery: correlation between oxaliplatin exposure and thrombocytopenia

Author

Chalret du Rieu, Quentin, White-Koning, Mélanie, Picaud, Laetitia, Lochon, Isabelle, Marsili, Sabrina, Gladieff, Laurence, Chatelut, Etienne, and Ferron, Gwenaël

Published
2014
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27. 'La séparation des gaz et des vapeurs par membranes'

Author

Chau, C., Deratani, A., Escoubes, M., Langevin, D., Lochon, P., Marais, S., Metayer, M., Nguyen, Q.T., Sanchez, J., Schaetzel, P., Sun, L.M., Institut Européen des membranes (IEM), and Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)

Published
2005

34. Functional anatomy of simple and complex mental calculation using PET

Author

UCL - PSP/PSP - Faculté de psychologie et des sciences de l'éducation, Zago, L., Pesenti, Mauro, Mellet, E., Bricogne, S., Seron, Xavier, Beaudoin, V., Lochon, P., Mazoyer, B., Mazoyer, N., UCL - PSP/PSP - Faculté de psychologie et des sciences de l'éducation, Zago, L., Pesenti, Mauro, Mellet, E., Bricogne, S., Seron, Xavier, Beaudoin, V., Lochon, P., Mazoyer, B., and Mazoyer, N.

Abstract

Current models of arithmetical cognition assume that adults solve simple arithmetic problems (e.g. 4 x 6) by retrieving an answer from a network of stored declarative associations whereas complex calculations (e.g. 24 x 75) require actual computation. The present study was aimed at separating, in the context of arithmetic, the cerebral areas involved in memory retrieval and those involved in computation.

Published
1999

38. DESTRUCTION DU PATRIMOINE SYRIEN ET IRAKIEN CIVIL ET RELIGIEUX.

Author

LOCHON, Christian

Abstract

The article reports on the preservation of architectural heritage of all eras in Iraq and Syria. Topics discussed include the history of destruction of the Syrian and Iraqi civil and religious heritage; an exhibition devoted to destruction of heritage at Grand Palais in Paris, France on December 13, 2016 to January 9, 2017; and an agreement signed by 10 Arab states to fight against the trafficking of antiquities and to protect their archaeological heritage.

Published
2017

39. Comparison of two-fluid models on steam-water transients

Author

Lochon, Hippolyte, Daude, Frédéric, Galon, Pascal, and Hérard, Jean-Marc

Abstract

This paper is devoted to the comparison of three two-fluid models in steam-water applications involving phase transition and shock waves. The three models are presented in a common formalism that helps to underline their shared properties. A numerical method based on previous work is extended to all models and to more complex Equations Of State. Particular attention is paid to the verification of every step of the method so that convergence studies can be carried out. Afterwards, models are compared with each other and with experimental data in two different cases of steam-water transients. The first one is Simpson water-hammer experiment and the second one is a rapid depressurization with flashing studied in Canon experiment.

Published
2016
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