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890 results on '"Olivier, Thomas"'

7. In vitro grafting of hepatic spheroids and organoids on a microfluidic vascular bed

Author

Bonanini, Flavio, Kurek, Dorota, Previdi, Sara, Nicolas, Arnaud, Hendriks, Delilah, de Ruiter, Sander, Meyer, Marine, Clapés Cabrer, Maria, Dinkelberg, Roelof, García, Silvia Bonilla, Kramer, Bart, Olivier, Thomas, Hu, Huili, López-Iglesias, Carmen, Schavemaker, Frederik, Walinga, Erik, Dutta, Devanjali, Queiroz, Karla, Domansky, Karel, Ronden, Bob, Joore, Jos, Lanz, Henriette L., Peters, Peter J., Trietsch, Sebastiaan J., Clevers, Hans, and Vulto, Paul

Published
2022
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11. Imaging the facet surface strain state of supported multi-faceted Pt nanoparticles during reaction

Author

Maxime Dupraz, Ni Li, Jérôme Carnis, Longfei Wu, Stéphane Labat, Corentin Chatelier, Rim van de Poll, Jan P. Hofmann, Ehud Almog, Steven J. Leake, Yves Watier, Sergey Lazarev, Fabian Westermeier, Michael Sprung, Emiel J. M. Hensen, Olivier Thomas, Eugen Rabkin, and Marie-Ingrid Richard

Subjects
Science
Abstract

Understanding strain dynamics and their relationship with crystallographic facets have been largely unexplored. Here the authors demonstrate how the 3D lattice displacement and strain evolution depend on the crystallographic facets of Pt nanoparticles during CO oxidation reaction, providing new insights in the relationship between facet-related surface strain and chemistry.

Published
2022
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14. Twin boundary migration in an individual platinum nanocrystal during catalytic CO oxidation

Author

Jérôme Carnis, Aseem Rajan Kshirsagar, Longfei Wu, Maxime Dupraz, Stéphane Labat, Michaël Texier, Luc Favre, Lu Gao, Freddy E. Oropeza, Nimrod Gazit, Ehud Almog, Andrea Campos, Jean-Sébastien Micha, Emiel J. M. Hensen, Steven J. Leake, Tobias U. Schülli, Eugen Rabkin, Olivier Thomas, Roberta Poloni, Jan P. Hofmann, and Marie-Ingrid Richard

Subjects
Science
Abstract

At the nanoscale, elastic strain and crystal defects largely influence the properties and functionalities of materials. Here, the authors report an unusual twin boundary migration process in a single platinum nanoparticle during carbon monoxide oxidation using Bragg coherent diffraction imaging.

Published
2021
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15. Comparison of Reduction Methods for Finite Element Geometrically Nonlinear Beam Structures

Author

Yichang Shen, Alessandra Vizzaccaro, Nassim Kesmia, Ting Yu, Loïc Salles, Olivier Thomas, and Cyril Touzé

Subjects
reduced-order model, direct normal form, geometric nonlinearity, modal derivatives, implicit condensation and expansion, Physics, QC1-999
Abstract

The aim of this contribution is to present numerical comparisons of model-order reduction methods for geometrically nonlinear structures in the general framework of finite element (FE) procedures. Three different methods are compared: the implicit condensation and expansion (ICE), the quadratic manifold computed from modal derivatives (MD), and the direct normal form (DNF) procedure, the latter expressing the reduced dynamics in an invariant-based span of the phase space. The methods are first presented in order to underline their common points and differences, highlighting in particular that ICE and MD use reduction subspaces that are not invariant. A simple analytical example is then used in order to analyze how the different treatments of quadratic nonlinearities by the three methods can affect the predictions. Finally, three beam examples are used to emphasize the ability of the methods to handle curvature (on a curved beam), 1:1 internal resonance (on a clamped-clamped beam with two polarizations), and inertia nonlinearity (on a cantilever beam).

Published
2021
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18. In‐situ force measurement during nano‐indentation combined with Laue microdiffraction

Author

Florian Lauraux, Sarah Yehya, Stéphane Labat, Jean‐Sébastien Micha, Odile Robach, Oleg Kovalenko, Eugen Rabkin, Olivier Thomas, and Thomas W. Cornelius

Subjects
force measurement, in situ nano‐indentation, Laue microdiffraction, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

Abstract For the characterization of the mechanical properties of materials the precise measurements of stress‐strain curves is indispensable. In situ nano‐mechanical testing setups, however, may lack the precision either in terms of strain or stress determination. Recently, the custom‐built scanning force microscope SFINX was developed which is compatible with third‐generation synchrotron end‐stations allowing for in situ nano‐mechanical tests in combination with nanofocused synchrotron x‐ray diffraction that is highly sensitive to strain and defects. The usage of a self‐actuating and self‐sensing cantilever tremendously increases the compactness of the system but lacks deflection sensitivity and, thus the force measurement. This deficiency is resolved by in situ monitoring the diffraction peaks of the Si cantilever by Laue microdiffraction during the nano‐indentation of a gold crystal. The orientation and, hence, the deflection of the Si cantilever is deduced from the displacement of the Si Laue spots on the detector giving force accuracies of better than 90 nN. At the same time, the dislocation density in the indented Au crystal is tracked by monitoring the Au Laue spots eventually resulting in complete stress‐dislocation density curves.

Published
2021
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19. Continuous scanning for Bragg coherent X-ray imaging

Author

Ni Li, Maxime Dupraz, Longfei Wu, Steven J. Leake, Andrea Resta, Jérôme Carnis, Stéphane Labat, Ehud Almog, Eugen Rabkin, Vincent Favre-Nicolin, Frédéric-Emmanuel Picca, Felisa Berenguer, Rim van de Poll, Jan P. Hofmann, Alina Vlad, Olivier Thomas, Yves Garreau, Alessandro Coati, and Marie-Ingrid Richard

Subjects
Medicine, Science
Abstract

Abstract We explore the use of continuous scanning during data acquisition for Bragg coherent diffraction imaging, i.e., where the sample is in continuous motion. The fidelity of continuous scanning Bragg coherent diffraction imaging is demonstrated on a single Pt nanoparticle in a flow reactor at $$400\,^\circ \hbox {C}$$ 400 ∘ C in an Ar-based gas flowed at 50 ml/min. We show a reduction of 30% in total scan time compared to conventional step-by-step scanning. The reconstructed Bragg electron density, phase, displacement and strain fields are in excellent agreement with the results obtained from conventional step-by-step scanning. Continuous scanning will allow to minimise sample instability under the beam and will become increasingly important at diffraction-limited storage ring light sources.

Published
2020
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20. In Situ Nano-Indentation of a Gold Sub-Micrometric Particle Imaged by Multi-Wavelength Bragg Coherent X-ray Diffraction

Author

Florian Lauraux, Stéphane Labat, Marie-Ingrid Richard, Steven J. Leake, Tao Zhou, Oleg Kovalenko, Eugen Rabkin, Tobias U. Schülli, Olivier Thomas, and Thomas W. Cornelius

Subjects
in situ nano-indentation, Bragg coherent X-ray diffraction imaging (BCDI), plasticity, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85
Abstract

The microstructure of a sub-micrometric gold crystal during nanoindentation is visualized by in situ multi-wavelength Bragg coherent X-ray diffraction imaging. The gold crystal is indented using a custom-built atomic force microscope. A band of deformation attributed to a shear band oriented along the (221) lattice plane is nucleated at the lower left corner of the crystal and propagates towards the crystal center with increasing applied mechanical load. After complete unloading, an almost strain-free and defect-free crystal is left behind, demonstrating a pseudo-elastic behavior that can only be studied by in situ imaging while it is invisible to ex situ examinations. The recovery is probably associated with reversible dislocations nucleation/annihilation at the side surface of the particle and at the particle-substrate interface, a behavior that has been predicted by atomistic simulations. The full recovery of the particle upon unloading sheds new light on extraordinary mechanical properties of metal nanoparticles obtained by solid-state dewetting.

Published
2022
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26. Comparison of the Von Kármán and Kirchhoff models for the post-buckling and vibrations of elastic beams

Author

Sébastien Neukirch, Morteza Yavari, Noël Challamel, and Olivier Thomas

Subjects
postbuckling, natural frequencies, nonlinearities, [phys.meca.solid]physics [physics]/mechanics [physics]/solid mechanics [physics.class-ph], [phys.meca.stru]physics [physics]/mechanics [physics]/structural mechanics [physics.class-ph], Mechanics of engineering. Applied mechanics, TA349-359
Abstract

We compare different models describing the buckling, post-buckling and vibrations of elastic beams in the plane. Focus is put on the first buckled equilibrium solution and the first two vibration modes around it. In the incipient post-buckling regime, the classic Woinowsky-Krieger model is known to grasp the behavior of the system. It is based on the von Kármán approximation, a 2nd order expansion in the strains of the buckled beam. But as the curvature of the beam becomes larger, the Woinowsky-Krieger model starts to show limitations and we introduce a 3rd order model, derived from the geometrically-exact Kirchhoff model. We discuss and quantify the shortcomings of the Woinowsky-Krieger model and the contributions of the 3rd order terms in the new model, and we compare them both to the Kirchhoff model. Different ways to nondi-mensionalize the models are compared and we believe that, although this study is performed for specific boundary conditions, the present results have a general scope and can be used as abacuses to estimate the validity range of the simplified models.

Published
2021
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28. X-ray Diffraction Imaging of Deformations in Thin Films and Nano-Objects

Author

Olivier Thomas, Stéphane Labat, Thomas Cornelius, and Marie-Ingrid Richard

Subjects
X-ray diffraction, strain, mapping, nanostructures, Chemistry, QD1-999
Abstract

The quantification and localization of elastic strains and defects in crystals are necessary to control and predict the functioning of materials. The X-ray imaging of strains has made very impressive progress in recent years. On the one hand, progress in optical elements for focusing X-rays now makes it possible to carry out X-ray diffraction mapping with a resolution in the 50–100 nm range, while lensless imaging techniques reach a typical resolution of 5–10 nm. This continuous evolution is also a consequence of the development of new two-dimensional detectors with hybrid pixels whose dynamics, reading speed and low noise level have revolutionized measurement strategies. In addition, a new accelerator ring concept (HMBA network: hybrid multi-bend achromat lattice) is allowing a very significant increase (a factor of 100) in the brilliance and coherent flux of synchrotron radiation facilities, thanks to the reduction in the horizontal size of the source. This review is intended as a progress report in a rapidly evolving field. The next ten years should allow the emergence of three-dimensional imaging methods of strains that are fast enough to follow, in situ, the evolution of a material under stress or during a transition. Handling massive amounts of data will not be the least of the challenges.

Published
2022
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29. La passion selon saint Matthieu : Matthieu 26-28

Author

Venard, Olivier-Thomas, Sous la direction de, Álvares, Maria Cristina, Ariño-Durand, Louis-Marie, Aujay de La Dure, Geoffroy, Aznar Sánchez, Carolina, Banderier, Gilles, Bar Asher, Méir, Baudoin, Anne-Catherine, Beaud, Mathieu, Benoteau-Alexandre, Marie-Ève, Bertin-Hugault, Anne, Bourgeois, Christophe, Bruyère, Agnès (Nathalie), Burnet, Régis, Chango, Paul-Marie Fidèle, Costa, José, Costea, Andrei, Cronier, Jean, Decout, Maxime, Delanoy, Blandine, Duclos-Grenet, Pauline, Durand, Emmanuel, Ente, Benoît, Évin, Jacques, Ferran, France, Friche, François, Galand, David, Galinier-Pallerola, Jean-François, Gałuszka, Tomasz, Gardeil, Pierre, Gérain, Sybille, Giambrone, Anthony, Gil, Marie, Giraud, Hervé, Gosselin-Noat, Monique, Heldt, Petra, Lafontaine, Xavier, Leroy, Marc, Lozier, Anne-Claire, Mahieu, Bieke, Marie-Ancilla, Méténier, Étienne, Mézin, Gonzague, Micos, Pauline, Millet, Clément, Moulin, Isabelle, Mouquin, Sophie, Pinon, Esther, Popko, Łukasz, Prigent, Gaël, Rico, Christophe, Rigot, Ioan, Robert, Olivier, Rousseau-Minier, Marjorie, Ruggeri, Marc, Ruzer, Serge, Saint-Aubin, Marie-Madeleine (Lucie), Silly, Renaud, Taillandier, Marie-Claire, Tavardon, Augustin (Paul), van Tooren, Marjolein, Vargas, Jorge, Venard, Olivier-Thomas, Vincent, David, Wohlman, Avital, Venard, Olivier-Thomas, Álvares, Maria Cristina, Ariño-Durand, Louis-Marie, Aujay de La Dure, Geoffroy, Aznar Sánchez, Carolina, Banderier, Gilles, Bar Asher, Méir, Baudoin, Anne-Catherine, Beaud, Mathieu, Benoteau-Alexandre, Marie-Ève, Bertin-Hugault, Anne, Bourgeois, Christophe, Bruyère, Agnès (Nathalie), Burnet, Régis, Chango, Paul-Marie Fidèle, Costa, José, Costea, Andrei, Cronier, Jean, Decout, Maxime, Delanoy, Blandine, Duclos-Grenet, Pauline, Durand, Emmanuel, Ente, Benoît, Évin, Jacques, Ferran, France, Friche, François, Galand, David, Galinier-Pallerola, Jean-François, Gałuszka, Tomasz, Gardeil, Pierre, Gérain, Sybille, Giambrone, Anthony, Gil, Marie, Giraud, Hervé, Gosselin-Noat, Monique, Heldt, Petra, Lafontaine, Xavier, Leroy, Marc, Lozier, Anne-Claire, Mahieu, Bieke, Marie-Ancilla, Méténier, Étienne, Mézin, Gonzague, Micos, Pauline, Millet, Clément, Moulin, Isabelle, Mouquin, Sophie, Pinon, Esther, Popko, Łukasz, Prigent, Gaël, Rico, Christophe, Rigot, Ioan, Robert, Olivier, Rousseau-Minier, Marjorie, Ruggeri, Marc, Ruzer, Serge, Saint-Aubin, Marie-Madeleine (Lucie), Silly, Renaud, Taillandier, Marie-Claire, Tavardon, Augustin (Paul), van Tooren, Marjolein, Vargas, Jorge, Venard, Olivier-Thomas, Vincent, David, and Wohlman, Avital

Published
2021
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30. Kinematic scattering by nanocrystals

Author

Olivier Thomas and Ismail Cevdet Noyan

Subjects
General Biochemistry, Genetics and Molecular Biology
Abstract

Various formulations are compared which describe diffraction from ultra-thin single-crystal films in the symmetric scattering configuration, showing that, for this thickness range, several implicit assumptions in these formulations are no longer satisfied. Consequently, the position, integrated intensity and integral breadth of a diffraction peak cannot be related to the lattice spacing of the material or the number of unit cells along the diffraction vector using traditional analysis methods. Some simple equations are proposed to obtain the correct values of these parameters for this specific sample/diffraction geometry combination. More generally, the development of rigorous formalisms for analyzing diffraction from nanocrystals is proposed.

Published
2023

31. Crystallographic Anisotropy Dependence of Interfacial Sliding Phenomenon in a Cu(16)/Nb(16) ARB (Accumulated Rolling Bonding) Nanolaminate

Author

Rahul Sahay, Arief S. Budiman, Izzat Aziz, Etienne Navarro, Stéphanie Escoubas, Thomas W. Cornelius, Fergyanto E. Gunawan, Christian Harito, Pooi See Lee, Olivier Thomas, and Nagarajan Raghavan

Subjects
nanoindentation, finite element analysis, nanolayers, pile-up, plastic deformation, interfacial sliding, Chemistry, QD1-999
Abstract

Nanolaminates are extensively studied due to their unique properties, such as impact resistance, high fracture toughness, high strength, and resistance to radiation damage. Varieties of nanolaminates are being fabricated to achieve high strength and fracture toughness. In this study, one such nanolaminate fabricated through accumulative roll bonding (Cu(16)/Nb(16) ARB nanolaminate, where 16 nm is the layer thickness) was used as a test material. Cu(16)/Nb(16) ARB nanolaminate exhibits crystallographic anisotropy due to the existence of distinct interfaces along the rolling direction (RD) and the transverse direction (TD). Nanoindentation was executed using a Berkovich tip, with the main axis oriented either along TD or RD of the Cu(16)/Nb(16) ARB nanolaminate. Subsequently, height profiles were obtained along the main axis of the Berkovich indent for both TD and RD using scanning probe microscopy (SPM), which was later used to estimate the pile-up along the RD and TD. The RD exhibited more pile-up than the TD due to the anisotropy of the Cu(16)/Nb(16) ARB interface and the material plasticity along the TD and RD. An axisymmetric 2D finite element analysis (FEA) was also performed to compare/validate nanoindentation data, such as load vs. displacement curves and pile-up. The FEA simulated load vs. displacement curves matched relatively well with the experimentally generated load–displacement curves, while qualitative agreement was found between the simulated pile-up data and the experimentally obtained pile-up data. The authors believe that pile-up characterization during indentation is of great importance to documenting anisotropy in nanolaminates.

Published
2022
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33. Phenotypic screening in Organ-on-a-Chip systems: a 1537 kinase inhibitor library screen on a 3D angiogenesis assay

Author

Soragni, Camilla, primary, Queiroz, Karla, additional, Ng, Chee Ping, additional, Stok, Arthur, additional, Olivier, Thomas, additional, Tzagkaraki, Dora, additional, Heijmans, Jeroen, additional, Suijker, Johnny, additional, de Ruiter, Sander P. M., additional, Olczyk, Aleksandra, additional, Bokkers, Marleen, additional, Schavemaker, Frederik, additional, Trietsch, Sebastian J., additional, Lanz, Henriëtte L., additional, Vulto, Paul, additional, and Joore, Jos, additional

Published
2023
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34. Eight-wavelength Digital Inline Holography and Brightfield Imaging in a single microscope

Author

Dixneuf, Sophie, primary, Olivier, Thomas, additional, Sedaghat, Zohreh, additional, Thibon, Louis, additional, Montvernay, Régis, additional, Degout-Charmette, Elodie, additional, Faure, Nicolas, additional, Kolytcheff, Chloé, additional, Fournier, Corinne, additional, Védrine, Christophe, additional, Josso, Quentin, additional, and Mallard, Frédéric, additional

Published
2023
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38. Artificial intelligence software standardizes electrogram‐based ablation outcome for persistent atrial fibrillation

Author

Julien Seitz, Théophile Mohr Durdez, Jean P. Albenque, André Pisapia, Edouard Gitenay, Cyril Durand, Jacques Monteau, Ghassan Moubarak, Guillaume Théodore, Antoine Lepillier, Alexandre Zhao, Michel Bremondy, Alexandre Maluski, Bruno Cauchemez, Stéphane Combes, Yves Guyomar, Sébastien Heuls, Olivier Thomas, Guillaume Penaranda, Sabrina Siame, Anthony Appetiti, Paola Milpied, Clément Bars, and Jérôme Kalifa

Subjects
Treatment Outcome, Artificial Intelligence, Pulmonary Veins, Recurrence, Physiology (medical), Atrial Fibrillation, Catheter Ablation, Humans, Prospective Studies, Cardiology and Cardiovascular Medicine, Anti-Arrhythmia Agents, Software
Abstract

Multiple groups have reported on the usefulness of ablating in atrial regions exhibiting abnormal electrograms during atrial fibrillation (AF). Still, previous studies have suggested that ablation outcomes are highly operator- and center-dependent. This study sought to evaluate a novel machine learning software algorithm named VX1 (Volta Medical), trained to adjudicate multipolar electrogram dispersion.This study was a prospective, multicentric, nonrandomized study conducted to assess the feasibility of generating VX1 dispersion maps. In 85 patients, 8 centers, and 17 operators, we compared the acute and long-term outcomes after ablation in regions exhibiting dispersion between primary and satellite centers. We also compared outcomes to a control group in which dispersion-guided ablation was performed visually by trained operators.The study population included 29% of long-standing persistent AF. AF termination occurred in 92% and 83% of the patients in primary and satellite centers, respectively, p = 0.31. The average rate of freedom from documented AF, with or without antiarrhythmic drugs (AADs), was 86% after a single procedure, and 89% after an average of 1.3 procedures per patient (p = 0.4). The rate of freedom from any documented atrial arrhythmia, with or without AADs, was 54% and 73% after a single or an average of 1.3 procedures per patient, respectively (p 0.001). No statistically significant differences between outcomes of the primary versus satellite centers were observed for one (p = 0.8) or multiple procedures (p = 0.4), or between outcomes of the entire study population versus the control group (p 0.2). Interestingly, intraprocedural AF termination and type of recurrent arrhythmia (i.e., AF vs. AT) appear to be predictors of the subsequent clinical course.VX1, an expertise-based artificial intelligence software solution, allowed for robust center-to-center standardization of acute and long-term ablation outcomes after electrogram-based ablation.

Published
2022

40. Language of Form, Form of Language, and the Poetic Christ.

Author

Venard, Olivier‐Thomas

Subjects
*POETICS, *METAPHYSICS, *PHENOMENOLOGY, *AESTHETICS
Abstract

This essay begins with a phenomenological outline of the interchangeability of the terms 'form' and 'matter', and the transitivity of their relationship in metaphysics and aesthetics, when placed in the context of linguistic deconstruction. It then argues for an operative, rather than resultative, approach to 'form', pointing out that in a created cosmos created minds only ever approach substantial (metaphysical) forms by making use of language, i.e. by inventing linguistic forms. From there, the argument turns to the special language of the Scriptures, when read both in their historical relativity and as vehicles of the transcendent divine Word, and explores the analogy between the paradoxes of the matter‐form pair and several features of the Scriptures, such as the Möbius strip‐like enunciative structure, in which human and divine voices are reciprocally interwoven. Christ, the principle of the unity of the divine and human voices of the Scriptures, appears as the source of all the analogical instances of the transitivity and reversibility of form‐matter duality. Even more profoundly than his restoration of the signum, Christ re‐establishes 'form' in its interaction with 'matter'. [ABSTRACT FROM AUTHOR]

Published
2024
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42. Open science resources from the Tara Pacific expedition across coral reef and surface ocean ecosystems

Author

Fabien Lombard, Guillaume Bourdin, Stéphane Pesant, Sylvain Agostini, Alberto Baudena, Emilie Boissin, Nicolas Cassar, Megan Clampitt, Pascal Conan, Ophélie Da Silva, Céline Dimier, Eric Douville, Amanda Elineau, Jonathan Fin, J. Michel Flores, Jean François Ghiglione, Benjamin C.C. Hume, Laetitia Jalabert, Seth G. John, Rachel L. Kelly, Ilan Koren, Yajuan Lin, Dominique Marie, Ryan McMinds, Zoé Mériguet, Nicolas Metzl, David A. Paz-García, Maria Luiza Pedrotti, Julie Poulain, Mireille Pujo-Pay, Joséphine Ras, Gilles Reverdin, Sarah Romac, Alice Rouan, Eric Röttinger, Assaf Vardi, Christian R. Voolstra, Clémentine Moulin, Guillaume Iwankow, Bernard Banaigs, Chris Bowler, Colomban de Vargas, Didier Forcioli, Paola Furla, Pierre E. Galand, Eric Gilson, Stéphanie Reynaud, Shinichi Sunagawa, Matthew B. Sullivan, Olivier Thomas, Romain Troublé, Rebecca Vega Thurber, Patrick Wincker, Didier Zoccola, Denis Allemand, Serge Planes, Emmanuel Boss, Gaby Gorsky, Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Global Oceans Systems Ecology & Evolution - Tara Oceans (GOSEE), Université de Perpignan Via Domitia (UPVD)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Aix Marseille Université (AMU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université d'Évry-Val-d'Essonne (UEVE)-Université de Toulon (UTLN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche pour le Développement (IRD [France-Nord])-Ecole Normale Supérieure Paris-Saclay (ENS Paris Saclay)-European Molecular Biology Laboratory (EMBL)-École Centrale de Nantes (Nantes Univ - ECN), Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Université australe du Chili, Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), University of Maine, European Molecular Biology Laboratory [Hinxton], Shimoda Marine Research Center, Université de Tsukuba = University of Tsukuba, Centre de recherches insulaires et observatoire de l'environnement (CRIOBE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Nicholas School of the Environment, Duke University [Durham], Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche sur le Cancer et le Vieillissement (IRCAN), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Institut Fédératif de Recherche - Ressources Marines (IFR MARRES), Université Côte d'Azur (UCA), Laboratoire International Associé Réponse des Organismes et Populations face au Stress Environnemental - Université Côte d’Azur - Centre Scientifique de Monaco (LIA ROPSE), Université Côte d’Azur - Centre Scientifique de Monaco, Laboratoire d'Océanographie Microbienne (LOMIC), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), OSU Stations marines (STAMAR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Géochrononologie Traceurs Archéométrie (GEOTRAC), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Cycles biogéochimiques marins : processus et perturbations (CYBIOM), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Weizmann Institute of Science [Rehovot, Israël], Universität Konstanz, Department of Earth Sciences [USC Los Angeles], University of Southern California (USC), Station biologique de Roscoff (SBR), Maison de la Modélisation, de la Simulation et des Interactions [Sophia-Antipolis] (MSI), Oregon State University (OSU), Centro de Investigaciones Biologicas del Noroeste [Mexico] (CONACYT-CIBNOR), Consejo Nacional de Ciencia y Tecnología [Mexico] (CONACYT), Institut de Biologie François JACOB (JACOB), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Processus et interactions de fine échelle océanique (PROTEO), Tara Ocean Foundation, Institut de biologie de l'ENS Paris (IBENS), Département de Biologie - ENS Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Ecogéochimie des environnements benthiques (LECOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB), Centre Scientifique de Monaco (CSM), Ohio State University [Columbus] (OSU), Institute of Microbiology and Swiss Institute of Bioinformatics, Martin Ryan Institute, and National University of Ireland [Galway] (NUI Galway)

Subjects
[SDU]Sciences of the Universe [physics], Ecosystem ecology, Biodiversity
Abstract

The Tara Pacific expedition (2016-2018) sampled coral ecosystems around 32 islands in the Pacific Ocean and the ocean surface waters at 249 locations, resulting in the collection of nearly 58,000 samples. The expedition was designed to systematically study warm coral reefs and included the collection of corals, fish, plankton, and seawater samples for advanced biogeochemical, molecular, and imaging analysis. Here we provide a complete description of the sampling methodology, and we explain how to explore and access the different datasets generated by the expedition. Environmental context data were obtained from taxonomic registries, gazetteers, almanacs, climatologies, operational biogeochemical models, and satellite observations. The quality of the different environmental measures has been validated not only by various quality control steps but also through a global analysis allowing the comparison with known environmental large-scale structures. Such a wide released datasets opens the perspective to address a wide range of scientific questions.

Published
2023

45. Abstract 5876: Sorafenib and Lenvatinib induce vascular responses in patient derived HCC on-Chip models

Author

Mocellin, Orsola, primary, Robinson, Abbie, additional, Olczyk, Aleksandra, additional, Treillard, Stephane, additional, Olivier, Thomas, additional, Ng, Chee, additional, Heijmans, Jeroen, additional, Goubert, Désiréé, additional, Stok, Arthur, additional, van Tienderen, Gilles, additional, Verstegen, Monique, additional, Trietsch, Sebastian, additional, Lanz, Henriëtte, additional, Vulto, Paul, additional, Joore, Jos, additional, and Queiroz, Karla S., additional

Published
2023
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46. Entre désir de nature et peur de l’abandon : quelles attentes paysagères après l’arasement des barrages hydroélectriques de la Sélune ?

Author

Marie-Anne Germaine, Ludovic Drapier, Laurent Lespez, Marie-Jo Menozzi, and Olivier Thomas

Subjects
valley landscape, ecological restoration, hydroelectric dam, wasteland, landscape controversy, Social Sciences
Abstract

Through the example of a project for the removal of two hydroelectric dams of 16 and 36 metres in height spanning the Sélune River, this article examines the importance of the landscape in such a project and in the discussions concerning its implementation. The removal of obstacles spanning a river leads to a major reconfiguration of river environments and landscapes. The restoration of the river ecosystems involves defining new landscapes and at the same time this process is hampered by the great variety of representations of the stakeholders and by their different profiles. The aim is to see how the variety of views regarding the landscape can be crucial in addressing resistance to the ecological restoration of watercourses. This article is based on a confrontation of the representations of landscapes by residents and users in a survey, administered as part of a participant observation process, which involved qualitative interviews, implicit proposals made by the people promoting the levelling of the dams, and the concrete landscape project proposals made by design offices. The comparison of the landscape projects presented by the experts and the expectations expressed by the inhabitants pleads in favour of finding ways of more effectively taking the landscape into account. Since dismantling such structures results in the generation of new landscapes and raises the question of choices for the development of the dewatered areas, it seems necessary to take into consideration the expectations of local populations.

Published
2019
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47. Shear loading of FCC/BCC Cu/Nb nanolaminates studied by in situ X-ray micro-diffraction

Author

Etienne Navarro, Thomas W. Cornelius, Henry Proudhon, Rahul Sahay, Ihor Radchenko, Stéphanie Escoubas, Pooi See Lee, Nagarajan Raghavan, Arief S. Budiman, Olivier Thomas, Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Centre des Matériaux (CDM), Mines Paris - PSL (École nationale supérieure des mines de Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Department of Engineering Product Development (Singapore University of Technology and Design) (EPD-SUTD), School of Materials Science and Engineering [Singapore], Nanyang Technological University [Singapour], Oregon Institute of Technology, and Industrial Engineering Department, Bina Nusantara University, Jakarta, Indonesia

Subjects
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract

International audience; Face-centered cubic/body centered cubic (FCC/BCC) nanolaminates prepared by Accumulative Roll Bonding (ARB) have been extensively studied because of their unique mechanical properties. Recently, micro-beam bending experiments, performed on Cu/Nb ARB samples, have shown an anisotropic interface sliding behavior linked to the strong in-plane texture. To test interface sliding on a macroscale we have developed a shear test based upon a specific sample geometry and on in situ tensile loading on an X-ray synchrotron beamline. As received nanolaminate samples exhibit a very anisotropic crystallographic texture as expected from the fabrication process. In situ X-ray diffraction in the sheared zone during mechanical loading yields strains in Cu and Nb. Early brittle failure prevents investigating further the sliding at interfaces. This is probably caused by crack initiation from the inner surfaces of the notches used to induce shear.

Published
2023

48. Anomalous Glide Plane in Platinum Nano- and Microcrystals

Author

Marie-Ingrid Richard, Stéphane Labat, Maxime Dupraz, Jérôme Carnis, Lu Gao, Michaël Texier, Ni Li, Longfei Wu, Jan P. Hofmann, Mor Levi, Steven J. Leake, Sergey Lazarev, Michael Sprung, Emiel J.M. Hensen, Eugen Rabkin, Olivier Thomas, Nanostructures et Rayons X (NRX), Modélisation et Exploration des Matériaux (MEM), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), European Synchroton Radiation Facility [Grenoble] (ESRF), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Eindhoven University of Technology [Eindhoven] (TU/e), Technische Universität Darmstadt - Technical University of Darmstadt (TU Darmstadt), Technion - Israel Institute of Technology [Haifa], Deutsches Elektronen-Synchrotron [Hamburg] (DESY), Technische Universiteit Eindhoven (TU/e), ANR-21-CE08-0033,DINACS,Défauts dans les nanocristaux: Imagerie par diffraction cohérente des rayons X et simulations(2021), European Project: 818823,CARINE, Inorganic Materials & Catalysis, and EIRES Chem. for Sustainable Energy Systems

Subjects
[PHYS]Physics [physics], Glide planes, Bragg coherent diffraction imaging, General Engineering, General Physics and Astronomy, General Materials Science, platinum, defects, dislocations
Abstract

International audience; At the nanoscale, the properties of materials depend critically on the presence of crystal defects. However, imaging and characterising the structure of defects in three dimensions inside a crystal remain a challenge. Here, by using Bragg coherent diffraction imaging, we observe an unexpected anomalous {110} glide plane in two Pt sub-micrometer crystals grown by very different processes and having very different morphologies. The structure of the defects (type, associated glide plane and lattice displacement) is imaged in these faceted Pt crystals. Using this non-invasive technique both plasticity and unusual defect behaviour can be probed at the nanoscale.

Published
2023

49. Simultaneous Multi-Bragg Peak Coherent X-ray Diffraction Imaging

Author

Florian Lauraux, Stéphane Labat, Sarah Yehya, Marie-Ingrid Richard, Steven J. Leake, Tao Zhou, Jean-Sébastien Micha, Odile Robach, Oleg Kovalenko, Eugen Rabkin, Tobias U. Schülli, Olivier Thomas, and Thomas W. Cornelius

Subjects
Bragg coherent X-ray diffraction imaging (BCDI), Au crystal, twin boundary, Crystallography, QD901-999
Abstract

The simultaneous measurement of two Bragg reflections by Bragg coherent X-ray diffraction is demonstrated on a twinned Au crystal, which was prepared by the solid-state dewetting of a 30 nm thin gold film on a sapphire substrate. The crystal was oriented on a goniometer so that two lattice planes fulfill the Bragg condition at the same time. The Au 111 and Au 200 Bragg peaks were measured simultaneously by scanning the energy of the incident X-ray beam and recording the diffraction patterns with two two-dimensional detectors. While the former Bragg reflection is not sensitive to the twin boundary, which is oriented parallel to the crystal–substrate interface, the latter reflection is only sensitive to one part of the crystal. The volume ratio between the two parts of the twinned crystal is about 1:9, which is also confirmed by Laue microdiffraction of the same crystal. The parallel measurement of multiple Bragg reflections is essential for future in situ and operando studies, which are so far limited to either a single Bragg reflection or several in series, to facilitate the precise monitoring of both the strain field and defects during the application of external stimuli.

Published
2021
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