Olivier Bousquet, Guilhem Barruol, Emmanuel Cordier, Christelle Barthe, Soline Bielli, Radiance Calmer, E. J. Rindraharisaona, Greg Roberts, Pierre Tulet, Vincent Amélie, Frauke Fleischer‐Dogley, Alberto Mavume, Jonas Zucule, Lova Zakariasy, Bruno Razafindradina, François Bonnardot, Manvendra Singh, Édouard Lees, Jonathan Durand, Dominique Mékiès, Marine Claeys, Joris Pianezze, Callum Thompson, Chia‐Lun Tsai, Romain Husson, Alexis Mouche, Stéphane Ciccione, Julien Cattiaux, Fabrice Chauvin, Nicolas Marquestaut,
The international research program “ReNovRisk-CYCLONE” (RNR-CYC, 2017–2021) directly involves 20 partners from 5 countries of the south-west Indian-Ocean. It aims at improving the observation and modelling of tropical cyclones in the south-west Indian Ocean, as well as to foster regional cooperation and improve public policies adapted to present and future tropical cyclones risk in this cyclonic basin. This paper describes the structure and main objectives of this ambitious research project, with ...
Tópico(s): Geological and Geophysical Studies
2021 - Multidisciplinary Digital Publishing Institute | Atmosphere
Moglie Le Quintrec, Maxime Teisseyre, Nicole Bec, Émilien Delmont, Ilan Szwarc, Hélène Perrochia, Marie Christine Machet, Anthony Chauvin, Nicolas Mavroudakis, Guillaume Taïeb, Luca Lanfranco, Claire Rigothier, José Boucraut, Concetta Catalano, C. Geneste, Vincent Pernin, Christian Larroque, Jérôme Devaux, Anaïs Beyze,
Primary membranous nephropathy (MN) is an autoimmune glomerular disease in which autoantibodies are directed against podocyte proteins. In about 80% of cases the main targeted antigen is the phospholipase A2 receptor 1 (PLA2R1). Anti-PLA2R1 antibodies are mainly immunoglobulin G type 4 (IgG4). However, the antigenic target remains to be defined in 20% of cases. MN can be associated with chronic inflammatory demyelinating polyneuropathy, an autoimmune disease of the peripheral nervous system where a ...
Tópico(s): Vasculitis and related conditions
2021 - Elsevier BV | Kidney International
Lucile Riaboff, Sébastien Couvreur, Aurélien Madouasse, Marie Roig-Pons, Sébastien Aubin, P. Massabie, Alain Chauvin, Nicolas Bédère, Guy Plantier,
Our aim in this study was to investigate whether the behaviors of dairy cows on pasture, predicted with accelerometer data and combined with GPS data, can be used to better understand the relationship between behaviors and pasture characteristics. During spring 2018, 26 Holstein cows were equipped with a 3D-accelerometer and a GPS sensor fixed on a neck-collar for five days. The cows grazed alternatively in permanent and in temporary grasslands. The structural elements, soil moisture, slope and ...
Tópico(s): Genetic and phenotypic traits in livestock
2020 - Multidisciplinary Digital Publishing Institute | Sensors
Radosław Lenarczyk, Serge Bovéda, Kristina H. Haugaa, Tatjana Potpara, Paweł Syska, Ewa Jędrzejczyk‐Patej, Michel Chauvin, Nicolas Sadoul, Nikolaos Dagres,
The aim of this European Heart Rhythm Association (EHRA) prospective snapshot survey is to assess peri-procedural practices, implantation techniques, and short-term procedure-related complications associated with implantation of subcutaneous implantable cardioverter-defibrillator (S-ICD) or transvenous implantable cardioverter-defibrillator (TV-ICD), across tertiary European electrophysiology centres. An internet-based electronic questionnaire concerning implantation settings, peri-procedural routines, ...
Tópico(s): Cardiac electrophysiology and arrhythmias
2018 - Oxford University Press | EP Europace
Adrien Chauvin, Nicolas Stéphant, Ke Du, Junjun Ding, Ishan Wathuthanthri, Chang‐Hwan Choi, Pierre‐Yves Tessier, Abdel‐Aziz El Mel,
In this work, we report on an efficient approach to fabricating large-area and uniform planar arrays of highly ordered nanoporous gold nanowires. The approach consists in dealloying Au–Ag alloy nanowires in concentrated nitric acid. The Au–Ag alloy nanowires were obtained by thermal annealing at 800 °C for 2 h of Au/Ag stacked nanoribbons prepared by subsequent evaporation of silver and gold through a nanograted photoresist layer serving as a mask for a lift-off process. Laser interference lithography ...
Tópico(s): Anodic Oxide Films and Nanostructures
2017 - Multidisciplinary Digital Publishing Institute | Micromachines
Pierre Barron, Anne Bory, Sébastien Chauvin, Nicolas Jounin, Lucie Tourette,
Through a historic wave of strikes, France’s sans-papiers (immigrants without papers) became known as ‘ sans-papier workers’ and renewed their fight for legal status. The state instituted employment-based regularization and unions embraced migrant workers’ access to legal status as a labour issue. Following Bourdieu and Boltanski, this article traces the institutional genesis and political trajectory of the ‘sans-papier worker’ as symbolic category and objective group, highlighting its agonistic coproduction ...
Tópico(s): Migration, Identity, and Health
2016 - SAGE Publishing | Work Employment and Society
Maud Gits‐Muselli, Mazouz Benderdouche, Samia Hamane, Anselme Mingui, M. Feuilhade de Chauvin, Nicolas Guigue, Marie-Quitterie Picat, E. Bourrat, A. Petit, M. Bagot, Alexandre Alanio, Stéphane Bretagne,
Tinea capitis (TC) is a highly contagious fungal infection of the scalp due to dermatophytes in children. To obtain information on the epidemiology of TC in the urban area of Paris, we analysed the microbiological results of 3090 patients seen with suspected TC from October 2010 to September 2015 at Saint Louis hospital, Paris, France. A peak of TC was observed in 3–6 year-old children, followed by a progressive decrease until 16 years of age. Of the 1311 positive cultures, 95% (1246) yielded one ...
Tópico(s): Fungal Infections and Studies
2016 - Oxford University Press | Medical Mycology
Thomas Rapp, Pauline Chauvin, Nicolas Sirven,
Elderly people facing dependence are exposed to the financial risk of long lasting care expenditures. This risk is high for people facing cognitive, functional and behavioral problems. In the short-term, dependent elderly people face increased non-medical care expenditures. In the long-term, they face increased medical care expenditures, which are driven by emergency care events such as: emergency hospitalization, emergency medical visits, and emergency institutionalizations. In France, providing ...
Tópico(s): Intergenerational Family Dynamics and Caregiving
2015 - Elsevier BV | Social Science & Medicine
Kasper van der Vaart, Parmesh Gajjar, Gaël Épely-Chauvin, Nicolas Andreini, J. M. N. T. Gray, Christophe Ancey,
We experimentally study particle scale dynamics during segregation of a bidisperse mixture under oscillatory shear. Large and small particles show an underlying asymmetry that is dependent on the local particle concentration, with small particles segregating faster in regions of many large particles and large particles segregating slower in regions of many small particles. We quantify the asymmetry on bulk and particle scales, and capture it theoretically. This gives new physical insight into segregation ...
Tópico(s): Coagulation and Flocculation Studies
2015 - American Physical Society | Physical Review Letters
Delphine Bresch‐Pietri, Jonathan Chauvin, Nicolas Petit,
In this paper, it is proved that a predictor-based feedback controller can effectively yield asymptotic convergence for a class of linear systems subject to input-dependent input delay. This class is characterized by the delay being implicitly related to past values of the input via an integral model. This situation is representative of systems where transport phenomena take place, as is frequent in the process industry. The sufficient conditions obtained for asymptotic stabilization bring a local ...
Tópico(s): Hydraulic and Pneumatic Systems
2014 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Automatic Control
Delphine Bresch‐Pietri, Jonathan Chauvin, Nicolas Petit,
The paper exposes some of the potential of a recently introduced backstepping transformation for linear uncertain time-delay systems to address the classic problems of equilibrium regulation under partial measurements, disturbance rejection, parameter or delay adaptation. For each of these problems, an implementable control strategy is proposed. It is analyzed through a convergence analysis of infinite dimensional dynamics, based on a transport partial differential equation representation of the ...
Tópico(s): Stability and Control of Uncertain Systems
2012 - Elsevier BV | Automatica
Sébastien Chauvin, Nicolas Jounin,
Tópico(s): Education, sociology, and vocational training
2012 - Presses Universitaires De France | Quadrige
Delphine Bresch‐Pietri, J. Chauvin, Nicolas Petit,
At the light of a simple tutorial example, this paper discusses the merits of a recently introduced technique to control a class of systems with a delay depending on the past values of the control variables. The convergence proof of the proposed control strategy is obtained by a boundedness analysis of a class of delay differential equation, inspired by the Halanay inequality. The relations of the proposed technique with previous works from the literature on predictor-based controllers are discussed. ...
Tópico(s): Advanced Control Systems Optimization
2012 - Elsevier BV | IFAC Proceedings Volumes
Pierre Barron, Anne Bory, Sébastien Chauvin, Nicolas Jounin, Lucie Tourette,
Tópico(s): French Urban and Social Studies
2011 - La Découverte | Cahiers libres
Mathieu Hillion, J. Chauvin, Nicolas Petit,
In this paper, an open-loop control strategy to improve the stability of highly diluted Diesel combustion during sharp transients is proposed. The main advantage of this open-loop method is that no additional in-cylinder sensor is required. The approach coordinates existing airpath and fuelpath controllers, and aims at accurately controlling the end of the cool-flame phenomenon. For this purpose, the injection time is adjusted based on an auto-ignition model and a cool-flame model. Both models are ...
Tópico(s): Combustion and flame dynamics
2011 - Elsevier BV | Control Engineering Practice
Pierre Barron, Sébastien Chauvin, Nicolas Jounin, Anne Bory, Lucie Tourette,
Tópico(s): Social Sciences and Governance
2011 - La Découverte | Cahiers libres
Brigitte Chauvin, Nicolas Pouyanne, Reda Sahnoun,
We consider a two-color Pólya urn in the case when a fixed number S of balls is added at each step. Assume it is a large urn that is, the second eigenvalue m of the replacement matrix satisfies 1∕2<m∕S≤1. After n drawings, the composition vector has asymptotically a first deterministic term of order n and a second random term of order nm∕S. The object of interest is the limit distribution of this random term. The method consists in embedding the discrete-time urn in continuous time, getting a two- ...
Tópico(s): Markov Chains and Monte Carlo Methods
2010 - Institute of Mathematical Statistics | The Annals of Applied Probability
Jonathan Chauvin, Nicolas Petit,
In this paper we propose a general method to estimate periodic unknown input signals of finite-dimensional linear time-varying systems. We present an infinite-dimensional observer that reconstructs the coefficients of the Fourier decomposition of such systems. Although the overall system is infinite dimensional, convergence of the observer can be proven using a standard Lyapunov approach along with classic mathematical tools such as Cauchy series, Parseval equality, and compact embeddings of Hilbert ...
Tópico(s): Stability and Control of Uncertain Systems
2009 - Elsevier BV | Automatica
Mathieu Hillion, H. Buhlbuck, Jonathan Chauvin, Nicolas Petit,
Tópico(s): Combustion and flame dynamics
2009 - | SAE technical papers on CD-ROM/SAE technical paper series
Thomas Leroy, Jonathan Chauvin, Nicolas Petit,
Air path control of a spark ignition engine without an EGR loop, equipped with variable-valve-timing (VVT) actuators, is addressed in this paper. VVT devices are used to produce internal exhaust gas recirculation, providing beneficial effects in terms of fuel consumption and pollutant emissions reduction. However, VVT actuators affect the fresh air charge in the cylinders. This has an impact on the torque output (leading to driveability problems) and on the fuel/air ratio (FAR) (leading to pollution ...
Tópico(s): Hydraulic and Pneumatic Systems
2008 - Elsevier BV | Control Engineering Practice
J. Chauvin, Nicolas Petit, Pierre Rouchon, Gilles Corde, Christian Vigild,
In this paper, we address the problem of air path variables estimation for an HCCI engine. Two observers are pro- posed. Both rely on physical assumptions on the com- bustion, but use different sensors. After proving conver- gence in the two cases, we carry out comparisons based on simulation results. We stress the impact of two particu- lar additional sensors on obtained performance: fresh air and EGR temperature probes.
Tópico(s): Vehicle emissions and performance
2006 - | SAE technical papers on CD-ROM/SAE technical paper series
Brigitte Chauvin, Nicolas Pouyanne,
Abstract It is known that the joint distribution of the number of nodes of each type of an m ‐ary search tree is asymptotically multivariate normal when m ≤ 26. When m ≥ 27, we show the following strong asymptotics of the random vector X n = t ( X , … , X ), where X denotes the number of nodes containing i − 1 keys after having introduced n − 1 keys in the tree: There exist (nonrandom) vectors X, C, and S and random variables ρ and φ such that ( X n − nX )/ n − ρ( C cos(τ 2 log n + φ) + S sin(τ 2 log n + φ)) → n →∞ 0 almost surely and in ...
Tópico(s): Algorithms and Data Compression
2004 - Wiley | Random Structures and Algorithms
Roman Anufriev, Nicolas Chauvin, H. Khmissi, Khalid Naji, M. Gendry, C. Bru‐Chevallier,
... Cite Icon Cite Search Site Citation Roman Anufriev, Nicolas Chauvin, Hammadi Khmissi, Khalid Naji, Michel Gendry, Catherine Bru- ...
Tópico(s): Semiconductor Quantum Structures and Devices
2012 - American Institute of Physics | Applied Physics Letters
Anthony Chauvin, Nicolas Javaud, Daniel Aiham Ghazali, Sonja Curac, Adrien Altar, Talina Ali, Nora Béguin, Julien Bellier, Antoine Coupier, Laura Delsarte, Dora Dreyfuss, Nour Kheirbek, Clara Oudar, Yoann Stordeur, Morgane Weiss, Stéphane Gaudry, Jérôme Lambert, Damien Roux,
Venous sampling for blood gas analysis has been suggested as an alternative to arterial sampling in order to reduce pain. The main objective was to compare pain induced by venous and arterial sampling and to assess whether the type of sampling would affect clinical management or not.We performed an open-label randomised multicentre prospective study in four French EDs during a 4-week period. Non-hypoxaemic adults, whose medical management required blood gas analysis, were randomly allocated using ...
Tópico(s): Anesthesia and Sedative Agents
2020 - BMJ | Emergency Medicine Journal
Carrie M. Hall, Gregory M. Shaver, Jonathan Chauvin, Nicolas Petit,
In an effort to reduce dependence on petroleum-based fuels and increase engine efficiency, fuel-flexible engines with advanced technologies, including variable valve timing, are being developed. Fuel-flexible spark-ignition engines permit the increased use of ethanol–gasoline blends. Ethanol, an alternative to petroleum-based gasoline, is a renewable fuel, which has the added advantage of improving performance in operating regions that are typically knock limited due to the higher octane rating ...
Tópico(s): Biodiesel Production and Applications
2012 - SAGE Publishing | International Journal of Engine Research
Laëtitia Fauconnot, Caroline Nugier‐Chauvin, Nicolas Noiret, Henri Patin,
Abstract The well known drugs (S)-Ibuprofen and (S)-Naproxen were used as NMR shift reagents for the stereochemical analysis of alkylsulfoxides. It was shown that (S)-Naproxen could be worthwhile substituted to (S)-MPA or (S)-2-NMA for the stereochemical analysis of some chiral alkyl sulfoxides.
Tópico(s): Analytical Chemistry and Chromatography
1997 - Elsevier BV | Tetrahedron Letters
L. Balet, Marco Francardi, Annamaria Gerardino, Nicolas Chauvin, Blandine Alloing, C. Zinoni, Christelle Monat, Lianhe Li, Nicolas Le Thomas, R. Houdré, Andrea Fiore,
The authors demonstrate coupling at 1.3μm between single InAs quantum dots (QDs) and a mode of a two dimensional photonic crystal (PhC) defect cavity with a quality factor of 15 000. By spectrally tuning the cavity mode, they induce coupling with excitonic lines. They perform a time integrated and time-resolved photoluminescence and measure an eightfold increase in the spontaneous emission rate inducing a coupling efficiency of 96%. These measurements indicate the potential of single QDs in PhC cavities ...
Tópico(s): Semiconductor Quantum Structures and Devices
2007 - American Institute of Physics | Applied Physics Letters
Pierre Barron, Anne Bory, Sébastien Chauvin, Nicolas Jounin, Lucie Tourette,
En 2008, une nouvelle figure politique apparaît dans l’espace public français : le « travailleur sans papiers ». Cet article décrit brièvement ce changement, puis explore ce qui le précède : les transformations de politiques publiques et de pratiques institutionnelles qui ont contribué à donner forme, à défaut de lui donner nom, au « travailleur sans papiers ». Puis il explore ce qui suit immédiatement : les effets et les contradictions qu’induit une identification de « travailleur sans papiers » sur les mouvements, ...
Tópico(s): Education, sociology, and vocational training
2014 - Éditions Belin | Genèses
J. Chauvin, Nicolas Petit, Pierre Rouchon, Philippe Moulin, Gilles Corde,
In the context of modern engine control, one important variable is the individual Air Fuel Ratio (AFR) which is a good representation of the produced torque. It results from various inputs such as injected quantities, boost pressure, and the exhaust gas recirculation (EGR) rate. Further, for forthcoming HCCI engines and regeneration filters (Particulate filters, DeNOx), even slight AFR un- balance between the cylinders can have dramatic conse- quences and induce important noise, possible stall and ...
Tópico(s): Vehicle emissions and performance
2006 - | SAE technical papers on CD-ROM/SAE technical paper series
Mario Khoury, Hugo Quard, Tobias Herzig, Jan Meijer, Sébastien Pezzagna, Sébastien Cueff, Marco Abbarchi, Hai Son Nguyen, Nicolas Chauvin, Thomas Wood,
Abstract Silicon‐based micro‐ and nano‐structures for light management at near‐infrared and visible frequencies have been widely exploited for guided optics and metasurfaces. However, light emission with this material has been hampered by the indirect character of its bandgap. Here it is shown that, via ion beam implantation, light emitting G‐centers can be directly embedded within Si‐based Mie resonators previously obtained by solid state dewetting. Size‐ and position‐dependent, directional light ...
Tópico(s): Photonic and Optical Devices
2022 - Wiley | Advanced Optical Materials