Author: "M. Bouzit" / Search Limiters: Full Text - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"M. Bouzit"' showing total 34 results

Start Over Author "M. Bouzit" Search Limiters Full Text

34 results on '"M. Bouzit"'

1. Effects of Different Shaped Cavities and Bumps on Flow Structure and Wing Performance

Author: A. Mahboub, M. Bouzit, and A. Ghenaim
Subjects: aerodynamics, cfd analysis, dimple, drag, lift, naca 0012, turbulence models, Mechanical engineering and machinery, TJ1-1570
Abstract: The stall of an aircraft is one of the most dangerous phenomena in the aviation world, resulting in a sudden loss of lift because of boundary layer separation. This work aims to delay separation and to improve wing aerodynamic performances by introducing bumps and cavities on the upper surfaces of the wing. A numerical study on the effects of both cavities and bumps on flow structures and wing aerodynamics of NACA 0012 profile is conducted. The CFX code has been used to perform calculations of steady and uncompressible Reynolds Averaged Naviers-Stokes equations. The airfoil has been exposed to a free stream velocity of 5.616 m/s and chord based Reynolds number of 3.6 x 105 (chord length). A series of test on unmodified airfoil has been carried out for various turbulence models at angles of attack ranging from 0° to 15°. Then, the two-equation k-ω SST (Shear Stress Transport) has been retained for the further cases. Different configurations obtained through a modification of cavities and bumps shape, dimension, and position on the airfoil chord are investigated. Both the shapes considered are semi-spherical and semi-cylindrical, placed at two positions on the airfoil chord. The first location is in suction pick at X/C= 0.3 and the second one is at 0.7. Results show that the application of bumps delays the boundary layer separation and increase drag coefficient. A slight enhancement in lift and drag is observed at angle of attack of 15° for the cases where the cavities are placed at 0.7 m from the leading edge. In addition, calculations show that the stability of the vortex formed inside the cavities depends strongly on their shape and the cylindrical one has better performances.
Published: 2022
Full Text: View/download PDF

2. Contribution of insurance data to cost assessment of coastal flood damage to residential buildings: insights gained from Johanna (2008) and Xynthia (2010) storm events

Author: C. André, D. Monfort, M. Bouzit, and C. Vinchon
Subjects: Environmental technology. Sanitary engineering, TD1-1066, Geography. Anthropology. Recreation, Environmental sciences, GE1-350, Geology, QE1-996.5
Abstract: There are a number of methodological issues involved in assessing damage caused by natural hazards. The first is the lack of data, due to the rarity of events and the widely different circumstances in which they occur. Thus, historical data, albeit scarce, should not be neglected when seeking to build ex-ante risk management models. This article analyses the input of insurance data for two recent severe coastal storm events, to examine what causal relationships may exist between hazard characteristics and the level of damage incurred by residential buildings. To do so, data was collected at two levels: from lists of about 4000 damage records, 358 loss adjustment reports were consulted, constituting a detailed damage database. The results show that for flooded residential buildings, over 75% of reconstruction costs are associated with interior elements, with damage to structural components remaining very localised and negligible. Further analysis revealed a high scatter between costs and water depth, suggesting that uncertainty remains high in drawing up damage functions with insurance data alone. Due to the paper format of the loss adjustment reports, and the lack of harmonisation between their contents, the collection stage called for a considerable amount of work. For future events, establishing a standardised process for archiving damage information could significantly contribute to the production of such empirical damage functions. Nevertheless, complementary sources of data on hazards and asset vulnerability parameters will definitely still be necessary for damage modelling; multivariate approaches, crossing insurance data with external material, should also be investigated more deeply.
Published: 2013
Full Text: View/download PDF

3. L'évaluation économique des risques torrentiels : intérêts et limites pour les choix collectifs de prévention

Author: S. BROCHOT, P. DUCLOS, and M. BOUZIT
Subjects: Environmental technology. Sanitary engineering, TD1-1066, Environmental sciences, GE1-350
Abstract: Ce travail avait pour objectif de contribuer à cerner les difficultés méthodologiques et les usages envisageables de l'évaluation économique pour l'aide à la décision en matière de prévention des risques torrentiels. Il consistait à appliquer l'analyse coûts-bénéfices (ACB), outil retenu ici, à l'échelle d'un torrent pour différents dispositifs de protection contre les crues. Nous avons pu cerner les principales sources d'incertitude entachant l'ACB. Elles sont très nombreuses. En conséquence, à ce stade, l'ACB doit être considérée comme un outil d'aide à la décision parmi d'autres, d'une fiabilité toute relative. Un usage pertinent pourrait être l'évaluation comparative de différents dispositifs. Dans tous les cas, il importe dans la présentation des résultats de toute ACB de faire apparaître clairement les hypothèses adoptées, les simplifications effectuées, les incertitudes estimées.
Published: 2003

4. Effect of thermal buoyancy on flow pattern from a pair of side-by-side confined triangular cylinders

Author: H Laidoudi and M Bouzit
Subjects: Materials science, Complementary and alternative medicine, Pharmaceutical Science, Pharmacology (medical), Mechanics, Flow pattern, Thermal buoyancy
Abstract: The effects of ax ial and radial thermal buoyancy on fluid flow and mixed convection heat transfer from a pair of identical triangular cylinders in side-by-side arrangement confined within a straight channel. The numerical simulations are carried out by solving continuity, momentum and energy equations using the commercial code ANSYS-CFX. The obtained results are presented and discussed within the range of following conditions: Richardson number Ri = 0 to 2, Reynolds Re = 20, and Prandtl number Pr = 1 at fixed value of blockage ratio β = 0.2. The main results are depicted in terms of streamline and isotherm contours to analyze the fluidic and energetic behaviors. The total drag coefficient and average Nusselt number are also computed. Moreover, a simple correlation indicating the variations of drag coefficient and average Nusselt number versus Richardson number are also provided. It was found that for axial effect of thermal buoyancy, increase in buoyancy strength enhances the heat transfer rate for both cylinders. In other hand, for radial effect, increase in buoyancy strength increases the heat transfer rate of down cylinder and it is reduced for the upper cylinder. Bangladesh J. Sci. Ind. Res.55(1), 9-14, 2020
Published: 2020
Full Text: View/download PDF

5. The Solar Orbiter EUI instrument: The Extreme Ultraviolet Imager (Corrigendum)

Author: P. Rochus, F. Auchère, D. Berghmans, L. Harra, W. Schmutz, U. Schühle, P. Addison, T. Appourchaux, R. Aznar Cuadrado, D. Baker, J. Barbay, D. Bates, A. BenMoussa, M. Bergmann, C. Beurthe, B. Borgo, K. Bonte, M. Bouzit, L. Bradley, V. Büchel, E. Buchlin, J. Büchner, F. Cabé, L. Cadiergues, M. Chaigneau, B. Chares, C. Choque Cortez, P. Coker, M. Condamin, S. Coumar, W. Curdt, J. Cutler, D. Davies, G. Davison, J.-M. Defise, G. Del Zanna, F. Delmotte, V. Delouille, L. Dolla, C. Dumesnil, F. Dürig, R. Enge, S. François, J.-J. Fourmond, J.-M. Gillis, B. Giordanengo, S. Gissot, L. M. Green, N. Guerreiro, A. Guilbaud, M. Gyo, M. Haberreiter, A. Hafiz, M. Hailey, J.-P. Halain, J. Hansotte, C. Hecquet, K. Heerlein, M.-L. Hellin, S. Hemsley, A. Hermans, V. Hervier, J.-F. Hochedez, Y. Houbrechts, K. Ihsan, L. Jacques, A. Jérôme, J. Jones, M. Kahle, T. Kennedy, M. Klaproth, M. Kolleck, S. Koller, E. Kotsialos, E. Kraaikamp, P. Langer, A. Lawrenson, J.-C. Le Clech’, C. Lenaerts, S. Liebecq, D. Linder, D. M. Long, B. Mampaey, D. Markiewicz-Innes, B. Marquet, E. Marsch, S. Matthews, E. Mazy, A. Mazzoli, S. Meining, E. Meltchakov, R. Mercier, S. Meyer, M. Monecke, F. Monfort, G. Morinaud, F. Moron, L. Mountney, R. Müller, B. Nicula, S. Parenti, H. Peter, D. Pfiffner, A. Philippon, I. Phillips, J.-Y. Plesseria, E. Pylyser, F. Rabecki, M.-F. Ravet-Krill, J. Rebellato, E. Renotte, L. Rodriguez, S. Roose, J. Rosin, L. Rossi, P. Roth, F. Rouesnel, M. Roulliay, A. Rousseau, K. Ruane, J. Scanlan, P. Schlatter, D. B. Seaton, K. Silliman, S. Smit, P. J. Smith, S. K. Solanki, M. Spescha, A. Spencer, K. Stegen, Y. Stockman, N. Szwec, C. Tamiatto, J. Tandy, L. Teriaca, C. Theobald, I. Tychon, L. van Driel-Gesztelyi, C. Verbeeck, J.-C. Vial, S. Werner, M. J. West, D. Westwood, T. Wiegelmann, G. Willis, B. Winter, A. Zerr, X. Zhang, and A. N. Zhukov
Subjects: Space and Planetary Science, Astronomy and Astrophysics
Published: 2022
Full Text: View/download PDF

6. The Solar Orbiter EUI instrument: The Extreme Ultraviolet Imager

Author: J. Hansotte, R. Müller, M. Hailey, P. Schlatter, A. Lawrenson, M. Monecke, Hardi Peter, Julien Rosin, Koen Stegen, Jean-Claude Vial, S. Parenti, Ali BenMoussa, Etienne Renotte, N. Szwec, Marie-Laure Hellin, R. Enge, M. Haberreiter, A. Philippon, P. Coker, B. Giordanengo, L. Dolla, K. Heerlein, Werner Schmutz, Matthew J. West, K. Ruane, J.-F. Hochedez, M. Chaigneau, M. Kahle, Emmanuel Mazy, J. Scanlan, J. Tandy, J. Barbay, B. Chares, T. Appourchaux, Laurence Rossi, C. Dumesnil, E. Pylyser, R. Aznar Cuadrado, Louise K. Harra, S. Meyer, F. Cabé, Benoit Marquet, Evgueni Meltchakov, Andrei Zhukov, D. Westwood, Bogdan Nicula, G. Willis, M.-F. Ravet-Krill, B. Borgo, S. Hemsley, Isabelle Tychon, N. Guerreiro, D. Linder, R. Mercier, Sylvie Liébecq, Thomas Wiegelmann, Philip J. Smith, M. Gyo, L. Mountney, G. Davison, Frédéric Rabecki, Jean-Marie Gillis, P. Langer, P. Roth, Sami K. Solanki, Luciano Rodriguez, Jean-Philippe Halain, L. Cadiergues, P. Addison, V. Büchel, D. Markiewicz-Innes, X. Zhang, Daniel Pfiffner, M. Roulliay, Antoine Rousseau, Stéphane Roose, Udo Schühle, M. Spescha, Jean-Yves Plesseria, Lionel Jacques, J. C. Le Clec’h, Yvan Stockman, G. Del Zanna, T. Kennedy, C. Beurthe, B. Mampaey, Franck Delmotte, C. Theobald, C. Choque Cortez, S. Meining, S. François, David Long, M. Bergmann, F. Rouesnel, S. Koller, C. Tamiatto, M. Bouzit, David Berghmans, D. Bates, L. Bradley, E. Kotsialos, A. Hafiz, D. Davies, J. B. L. Jones, S. Smit, Véronique Delouille, Gilles Morinaud, Aline Hermans, S. Coumar, J. Rebellato, Yvette Houbrechts, Stephan Werner, Werner Curdt, J. Cutler, K. Bonte, Daniel B. Seaton, Jean-Marc Defise, F. Moron, M. Klaproth, Eric Buchlin, J.-J. Fourmond, I. Phillips, Jörg Büchner, Pierre Rochus, M. Kolleck, Christophe Hecquet, Sarah A. Matthews, L. van Driel-Gesztelyi, Lucie M. Green, Cis Verbeeck, S. Gissot, F. Dürig, M. Condamin, Cedric Lenaerts, F. Auchère, K. Ihsan, K. Silliman, A. Guilbaud, Luca Teriaca, E. Kraaikamp, F. Monfort, A. Jérôme, Andreas Zerr, E. Marsch, Berend Winter, D. N. Baker, Alexandra Mazzoli, A. Spencer, V. Hervier, Institut d'astrophysique spatiale (IAS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay, Centre Spatial de Liège (CSL), Université de Liège, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Royal Observatory of Belgium [Brussels] (ROB), Mullard Space Science Laboratory (MSSL), University College of London [London] (UCL), Physikalisch-Meteorologisches Observatorium Davos/World Radiation Center (PMOD/WRC), Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Max Planck Institute for Solar System Research (MPS), Laboratoire Charles Fabry / Optique XUV, Laboratoire Charles Fabry (LCF), Institut d'Optique Graduate School (IOGS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre National d'Études Spatiales [Toulouse] (CNES), Faculty of mathematics Centre for Mathematical Sciences [Cambridge] (CMS), and University of Cambridge [UK] (CAM)
Subjects: 010504 meteorology & atmospheric sciences, Field of view, Context (language use), Astrophysics, 01 natural sciences, 7. Clean energy, law.invention, Orbiter, law, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Aerospace engineering, 010303 astronomy & astrophysics, Chromosphere, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Physics, business.industry, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Ecliptic, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Corona, 13. Climate action, Space and Planetary Science, Extreme ultraviolet, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, business, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Heliosphere
Abstract: Context.The Extreme Ultraviolet Imager (EUI) is part of the remote sensing instrument package of the ESA/NASA Solar Orbiter mission that will explore the inner heliosphere and observe the Sun from vantage points close to the Sun and out of the ecliptic. Solar Orbiter will advance the “connection science” between solar activity and the heliosphere.Aims.With EUI we aim to improve our understanding of the structure and dynamics of the solar atmosphere, globally as well as at high resolution, and from high solar latitude perspectives.Methods.The EUI consists of three telescopes, the Full Sun Imager and two High Resolution Imagers, which are optimised to image in Lyman-αand EUV (17.4 nm, 30.4 nm) to provide a coverage from chromosphere up to corona. The EUI is designed to cope with the strong constraints imposed by the Solar Orbiter mission characteristics. Limited telemetry availability is compensated by state-of-the-art image compression, onboard image processing, and event selection. The imposed power limitations and potentially harsh radiation environment necessitate the use of novel CMOS sensors. As the unobstructed field of view of the telescopes needs to protrude through the spacecraft’s heat shield, the apertures have been kept as small as possible, without compromising optical performance. This led to a systematic effort to optimise the throughput of every optical element and the reduction of noise levels in the sensor.Results.In this paper we review the design of the two elements of the EUI instrument: the Optical Bench System and the Common Electronic Box. Particular attention is also given to the onboard software, the intended operations, the ground software, and the foreseen data products.Conclusions.The EUI will bring unique science opportunities thanks to its specific design, its viewpoint, and to the planned synergies with the other Solar Orbiter instruments. In particular, we highlight science opportunities brought by the out-of-ecliptic vantage point of the solar poles, the high-resolution imaging of the high chromosphere and corona, and the connection to the outer corona as observed by coronagraphs.
Published: 2020
Full Text: View/download PDF

7. Inflight performance of the PILOT balloon-borne experiment

Author: C. Engel, F. Pajot, J. Martignac, F. Bousqet, Y. Lepennec, S. Maestre, Nicolas Bray, Matthew Joseph Griffin, Peter A. R. Ade, A. Hughes, Silvia Masi, J. Narbonne, G. Foënard, René J. Laureijs, Frederi Mirc, Christopher Tibbs, J. M. Nicot, P. deBernardis, Y. André, G. Roudil, L. Rodriguez, Pierre Tapie, L. Bautista, B. Maffei, P. Etcheto, Etienne Perot, Peter Charles Hargrave, J. A. Tauber, J. P. Dubois, S. Grabarnik, B. Mot, M. Bouzit, L. Montier, O. Boulade, C. Marty, E. Doumayrou, Giampaolo Pisano, Isabelle Ristorcelli, H. Roussel, Nicolas Ponthieu, B. Leriche, A. Mangilli, X. Dupac, C. Tucker, Ph. Gelot, Y. Longval, Giorgio Savini, A. Lacourt, J. Aumont, V. Buttice, R. Misawa, M. Charra, Johan Montel, J. Pimentao, Muriel Saccoccio, W. Marty, B. Crane, M. Chaigneau, J.-P. Bernard, G. Parot, S. Stever, Maria Salatino, O. Simonella, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Centre National d'Études Spatiales [Toulouse] (CNES), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université Grenoble Alpes (UGA), Institut d'Astrophysique de Paris (IAP), and Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Point spread function, High energy particle, Far infrared, Residual, 01 natural sciences, Glitches, Background, Inflight performances, Interstellar dust, PILOT, Pointing, Polarization, Responses, Straylight, 0103 physical sciences, Calibration, 010303 astronomy & astrophysics, Cosmic dust, Remote sensing, 010308 nuclear & particles physics, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Polarization (waves), Wavelength, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Environmental science
Abstract: International audience; The Polarized Instrument for Long-wavelength Observation of the Tenuous interstellar medium (PILOT) is a balloon-borne experiment that aims to measure the polarized emission of thermal dust at a wavelength of 240 µm (1.2 THz). A first PILOT flight of the experiment took place from Timmins, Ontario, Canada, in September 2015 and a second flight took place from Alice Springs, Australia in April 2017. In this paper, we present the inflight performance of the instrument. Here we concentrate on the instrument performance as measured during the second flight, but refer to the performance observed during the first flight, if it was significantly different. We present a short description of the instrument and the flights. We measure the time constants of the detectors using the decay of the observed signal during flight following high energy particle impacts (glitches) and switching off the instrument's internal calibration source. We use these time constants to deconvolve the timelines and analyze the optical quality of the instrument as measured on planets. We then analyze the structure and polarization of the instrumental background. We measure the detector response flat field and its time variations using the signal from the residual atmosphere and from the internal calibration source. Finally, we analyze the spectral and temporal properties of the detector noise. The inflight performance is found to be satisfactory and globally in line with expectations from ground calibrations. We conclude by assessing the expected inflight sensitivity of the instrument in light of the measured inflight performance.
Published: 2019
Full Text: View/download PDF

8. Definition of a metrology servo-system for a solar imaging fourier transform spectrometer working in the far UV (IFTSUV)

Author: A. Philippon, Jean-Claude Vial, C. Ruiz de Galarreta Fanju, M. Bouzit, J. P. Maillard, T. Appourchaux, and P. Lemaire
Subjects: Physics, Wavelength, Tilt (optics), Signal-to-noise ratio, Quality (physics), Optics, Sampling (signal processing), business.industry, Temporal resolution, business, Optical path length, Metrology
Abstract: The understanding of the solar outer atmosphere requires a simultaneous combination of imaging and spectral observations concerning the far UV lines that arise from the high chromospheres up to the corona. These observations must be performed with enough spectral, spatial and temporal resolution to reveal the small atmospheric structures and to resolve the solar dynamics. An Imaging Fourier Transform Spectrometer working in the far-UV (IFTSUV, Figure 1) is an attractive instrumental solution to fulfill these requirements. However, due to the short wavelength, to preserve IFTSUV spectral precision and Signal to Noise Ratio (SNR) requires a high optical surface quality and a very accurate (linear and angular) metrology to maintain the optical path difference (OPD) during the entire scanning process by: optical path difference sampling trigger; and dynamic alignment for tip/tilt compensation (Figure 2).
Published: 2018
Full Text: View/download PDF

9. Pilot, a balloon borne experiment underground tests

Author: B. Mot, T. Camus, G. Otrio, C. Marty, J. Ph. Bernard, C. Engel, F. Pajot, A. Caillat, Jean-Pierre Dubois, M. Bouzit, B. Leriche, G. Roudil, Y. Longval, V. Buttice, and I. Ristorcelli
Subjects: Primary mirror, Test bench, Range (aeronautics), Measure (physics), Environmental science, Millimeter, Secondary mirror, Balloon, Remote sensing
Abstract: PILOT is a balloon borne experiment, which will measure the polarized emission of dust grains, in the interstellar medium, in the sub millimeter range (with two photometric channels centered at 240 and 550 μm). The primary and secondary mirror must be positioned with accuracies better than 0.6 mm and 0.06°. These tolerances include environmental conditions (mainly gravity and thermo-elastic effects), uncertainties on alignments, and uncertainties on the dilatation coefficient. In order to respect these tolerances, we need precise characterization of each optical component. The characterization of the primary mirror and the integrated instrument is performed using a dedicated submillimeter test bench. A brief description of the scientific objectives and instrumental concept is given in the first part. We present, in the second and in the third part, the status of these ground tests, first results and planned tests.
Published: 2017
Full Text: View/download PDF

10. PILOT: optical performance and end-to-end characterisation

Author: B. Mot, I. Ristorcelli, M. Bouzit, L. Rodriguez, C. Engel, F. Pajot, Giampaolo Pisano, G. Roudil, B. Crane, B. Leriche, P. de Bernardis, S. Maestre, Maria Salatino, O. Simonella, R. Misawa, Carole Tucker, F. Bousquet, W. Marty, Jean-Pierre Dubois, M. Charra, Peter Charles Hargrave, Y. André, V. Buttice, J. Narbonne, Nicolas Ponthieu, Y. Longval, Matthew Joseph Griffin, Peter A. R. Ade, Giorgio Savini, Serena Masi, C. Marty, Jean-Paul Bernard, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National d'Études Spatiales [Toulouse] (CNES), Université Grenoble Alpes (UGA), Institut de Physique Théorique - UMR CNRS 3681 (IPHT), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), and Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
Subjects: media_common.quotation_subject, Cosmic microwave background, Astrophysics::Cosmology and Extragalactic Astrophysics, 02 engineering and technology, 01 natural sciences, 7. Clean energy, law.invention, 010309 optics, symbols.namesake, law, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Planck, Astrophysics::Galaxy Astrophysics, media_common, instrumentation, Physics, Pilot experiment, Star formation, Bolometer, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Galactic plane, balloon-borne experiments, 021001 nanoscience & nanotechnology, Sub-millimetre astronomy, Galaxy, Sub-millimetre astronomy, instrumentation, balloon-borne experiments, 13. Climate action, Sky, symbols, 0210 nano-technology
Abstract: International audience; PILOT (Polarized Instrument for the Long-wavelength Observations of the Tenuous ISM), is a balloon-borne astronomy experiment dedicated to study the polarization of dust emission from the diffuse ISM in our Galaxy [1]. The observations of PILOT have two major scientific objectives. Firstly, they will allow us to constrain the large-scale geometry of the magnetic field in our Galaxy and to study in details the alignment properties of dust grains with respect to the magnetic field. In this domain, the measurements of PILOT will complement those of the Planck satellite at longer wavelengths. In particular, they will bring information at a better angular resolution, which is critical in crowded regions such as the Galactic plane. They will allow us to better understand how the magnetic field is shaping the ISM material on large scale in molecular clouds, and the role it plays in the gravitational collapse leading to star formation. Secondly, the PILOT observations will allow us to measure for the first time the polarized dust emission towards the most diffuse regions of the sky, where the measurements are the most easily interpreted in terms of the physics of dust. In this particular domain, PILOT will play a role for future CMB missions similar to that played by the Archeops experiment for Planck. The results of PILOT will allow us to gain knowledge about the magnetic properties of dust grains and about the structure of the magnetic field in the diffuse ISM that is necessary to a precise foreground subtraction in future polarized CMB measurements. The PILOT measurements, combined with those of Planck at longer wavelengths, will therefore allow us to further constrain the dust models. The outcome of such studies will likely impact the instrumental and technical choices for the future space missions dedicated to CMB polarization. The PILOT instrument will allow observations in two photometric channels at wavelengths 240 μm and 550 μm, with an angular resolution of a few arcminutes. We will make use of large format bolometer arrays, developed for the PACS instrument on board the Herschel satellite. With 1024 detectors per photometric channel and photometric band optimized for the measurement of dust emission, PILOT is likely to become the most sensitive experiment for this type of measurements. The PILOT experiment will take advantage of the large gain in sensitivity allowed by the use of large format, filled bolometer arrays at frequencies more favorable to the detection of dust emission. This paper presents the optical design, optical characterization and its performance. We begin with a presentation of the instrument and the optical system and then we summarise the main optical tests performed. In section III, we present preliminary end-to-end test results.
Published: 2017
Full Text: View/download PDF

11. Pilot optical alignment

Author: Nicolas Ponthieu, F. Pajot, J. M. Nicot, M. Chaigneau, G. Parot, Giorgio Savini, Y. André, M. Bouzit, Nicolas Bray, Johan Montel, C. Tucker, J.-P. Dubois, J. Martignac, J. Aumont, Maria Salatino, O. Simonella, V. Buttice, Bruno Maffei, R. J. Laureijs, R. Misawa, J.-Ph. Bernard, Frederi Mirc, B. Mot, J. Narbonne, Silvia Masi, O. Boulade, C. Engel, Etienne Perot, E. Doumayrou, A. Caillat, J. A. Tauber, C. Coudournac, A. Hughes, I. Ristorcelli, Y. Lepennec, S. Maestre, Pierre Tapie, Y. Longval, P. de Bernardis, F. Bousquet, G. Foenard, S. Grabarnik, Giampaolo Pisano, G. Roudil, P. Etcheto, P. Gélot, B. Leriche, Muriel Saccoccio, J. P. Crussaire, J. Pimentao, C. Marty, Matthew Joseph Griffin, Peter A. R. Ade, L. Baustista, M. Charra, F. Douchin, J.-P. Torre, L. Rodriguez, L. Montier, Peter Charles Hargrave, B. Crane, W. Marty, and G. Versepuech
Subjects: Physics, Optical alignment, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Polarization (waves), Galaxy, Interstellar medium, Wavelength, Long wavelength, Optics, business, Astrophysics::Galaxy Astrophysics, Dust emission, Ontario canada
Abstract: PILOT (Polarized Instrument for Long wavelength Observations of the Tenuous interstellar medium) is a balloonborne astronomy experiment designed to study the polarization of dust emission in the diffuse interstellar medium in our Galaxy. The PILOT instrument allows observations at wavelengths 240 μm (1.2THz) with an angular resolution about two arc-minutes. The observations performed during the first flight in September 2015 at Timmins, Ontario Canada, have demonstrated the optical performances of the instrument.
Published: 2017
Full Text: View/download PDF

12. The PILOT optical alignment for its first flight

Author: G. Roudil, B. Mot, Y. Longval, W. Marty, J. Aumont, R. Misawa, A. Caillat, Y. Lepennec, E. Doumayrou, G. Foënard, J. A. Tauber, A. Hughes, G. Parot, L. Montier, J. Pimentao, M. Chaigneau, F. Pajot, J.-Ph. Bernard, B. Crane, Johan Montel, B. Leriche, M. Bouzit, Nicolas Bray, V. Buttice, Nicolas Ponthieu, Pierre Tapie, Isabelle Ristorcelli, J. M. Nicot, Muriel Saccoccio, Giorgio Savini, F. Douchin, P. deBernardis, C. Coudournac, Frederi Mirc, J. Martignac, Etienne Perot, Bruno Maffei, J.-P. Torre, C. Engel, A. Mangilli, L. Rodriguez, Peter Charles Hargrave, S. Maestre, Y. André, Silvia Masi, L. Bautista, P. Etcheto, C. Marty, S. Stever, S. Grabarnik, Maria Salatino, O. Simonella, Giampaolo Pisano, J.-P. Dubois, Carole Tucker, P. Gélot, René J. Laureijs, F. Bousquet, Matthew Joseph Griffin, Peter A. R. Ade, J. Narbonne, Christopher Tibbs, and O. Boulade
Subjects: Cryostat, Optical alignment, Physics::Optics, Aerospace Engineering, Astrophysics, 01 natural sciences, law.invention, 010309 optics, Primary mirror, Optics, law, Polarization, 0103 physical sciences, Optical instrumentation, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, Gregorian telescope, business.industry, Submillimeter telescope, Polarization (waves), Galaxy, Interstellar medium, Wavelength, Space and Planetary Science, business
Abstract: PILOT is a balloon-borne astronomy experiment designed to study the polarization of dust emission in the diffuse interstellar medium in our Galaxy at wavelengths 240 and 550 µm with an angular resolution of about two arc-min. PILOT optics is composed of an off-axis Gregorian telescope and a refractive re-imager system. All these optical elements, except the primary mirror, are in a cryostat cooled to 3K. We used optical and 3D measurements combined with thermo-elastic modeling to perform the optical alignment. This paper describes the system analysis, the alignment procedure, and finally the performances obtained during the first flight in September 2015
Published: 2017

13. The optical performance of the PILOT instrument from ground end‐to‐end tests

Author: Y. Longval, O. Boulade, Maria Salatino, O. Simonella, René J. Laureijs, Nicolas Ponthieu, B. Leriche, Y. André, L. Bautista, J. Narbonne, J. A. Tauber, J. P. Dubois, Muriel Saccoccio, Carole Tucker, G. Roudil, Matthew Joseph Griffin, Peter A. R. Ade, Giorgio Savini, Isabelle Ristorcelli, J. Pimentao, L. Rodriguez, A. Caillat, B. Mot, M. Bouzit, A. Hughes, Peter Charles Hargrave, C. Engel, F. Bousqet, J. Montel, B. Maffei, E. Doumayrou, Silvia Masi, J.-P. Bernard, D. Alina, S. Maestre, G. Foënard, P. de Bernardis, L. Montier, M. Chaigneau, J. Aumont, R. Misawa, M. Charra, F. Douchin, W. Marty, Etienne Perot, C. Marty, V. Buttice, S. Grabarnik, Giampaolo Pisano, F. Pajot, B. Crane, Laboratoire d'Astrophysique de Marseille (LAM), and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Point spread function, Image quality, Far infrared, 01 natural sciences, 010309 optics, Optics, Polarization, 0103 physical sciences, PILOT, Straylight, 010303 astronomy & astrophysics, QB, Remote sensing, Cosmic dust, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Linear polarization, business.industry, Detector, Interstellar dust, Astronomy and Astrophysics, Space and Planetary Science, Polarization (waves), Wavelength, Cardinal point, business
Abstract: International audience; The Polarized Instrument for Long‐wavelength Observation of the Tenuous interstellar medium (PILOT) is a balloon‐borne astronomy experiment designed to study the linear polarization of thermal dust emission in two photometric bands centred at wavelengths 240 mu m (1.2 THz) and 550 mu m (545 GHz), with an angular resolution of a few arcminutes. Several end‐to‐end tests of the instrument were performed on the ground between 2012 and 2014, in order to prepare for the first scientific flight of the experiment that took place in September 2015 from Timmins, Ontario, Canada. This paper presents the results of those tests, focussing on an evaluation of the instrument's optical performance. We quantify image quality across the extent of the focal plane, and describe the tests that we conducted to determine the focal plane geometry, the optimal focus position, and sources of internal straylight. We present estimates of the detector response, obtained using an internal calibration source, and estimates of the background intensity and background polarization.
Published: 2017
Full Text: View/download PDF

14. CFD study of the effect of Baffles on the energy consumption and the flow structure in a vessel stirred by a Rushton turbine

Author: M. Bouzit, M. Beloudane, Kamla Youcef, I.M. Arab, and A. Hadjeb
Subjects: Engineering, business.industry, Turbulence, Flow (psychology), Baffle, Energy consumption, Mechanics, Computational fluid dynamics, Condensed Matter Physics, Turbine, Rushton turbine, Impeller, business, Simulation
Abstract: Baffles provide the considerable advantage of the free surface stability that enhances the turbine's shaft longevity on the other hand it increases the energy consumption due to the flow obstruction that they introduce. So the main issue of the present study is to find a balance between both advantages and disadvantages of baffles. To do so we've investigated numerically the influence of two parameters on the power consumption. First, the baffles radius of curvature varying from Rc*=0 to Rc*=7/30 and secondly the impeller's sense of rotation of. The results were obtained thanks to the ANSYS CFX code; the Navier-Stokes equations were coupled to the standard k_e turbulence model and solved with the Multiple Reference Frames (MRF) method. DOI: http://dx.doi.org/10.5755/j01.mech.22.3.12663
Published: 2016
Full Text: View/download PDF

15. Inflight performance of the PILOT balloon-borne experiment

Author: P. Etcheto, G. Foenard, I. Ristorcelli, W. Marty, F. Bousquet, Maria Salatino, O. Simonella, S. Grabarnik, Nicolas Ponthieu, Frederi Mirc, L. Rodriguez, J. A. Tauber, B. Mot, Pierre Tapie, Nicolas Bray, Giampaolo Pisano, Etienne Perot, R. Misawa, L. Montier, Giorgio Savini, Y. Lepennec, S. Maestre, Peter Charles Hargrave, B. Crane, J. Aumont, Bruno Maffei, C. Tucker, J.-P. Dubois, G. Parot, E. Doumayrou, L. Bautista, J.-Ph. Bernard, Johan Montel, V. Buttice, A. Caillat, M. Bouzit, Y. Longval, P. de Bernardis, R. J. Laureijs, C. Engel, Silvia Masi, J. Martignac, A. Hughes, G. Roudil, B. Leriche, Muriel Saccoccio, P. Gélot, M. Chaigneau, J. M. Nicot, J. Narbonne, Y. André, J.-P. Torre, J. P. Crussaire, J. Pimentao, C. Marty, F. Pajot, O. Boulade, M. Charra, F. Douchin, Matthew Joseph Griffin, and Peter A. R. Ade
Subjects: Physics, 010504 meteorology & atmospheric sciences, Applied Mathematics, Far infrared, Dust, Computer Science Applications1707 Computer Vision and Pattern Recognition, Condensed Matter Physics, 01 natural sciences, Ceiling balloon, Polarization, 0103 physical sciences, Balloon, ISM, PILOT, Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, 010303 astronomy & astrophysics, Flight data, 0105 earth and related environmental sciences, Remote sensing
Abstract: PILOT is a stratospheric experiment designed to measure the polarization of dust FIR emission, towards the diffuse interstellar medium. The first PILOT flight was carried out from Timmins in Ontario-Canada on September 20th 2015. The flight has been part of a launch campaign operated by the CNES, which has allowed to launch 4 experiments, including PILOT. The purpose of this paper is to describe the performance of the instrument in flight and to perform a first comparison with those achieved during ground tests. The analysis of the flight data is on-going, in particular the identification of instrumental systematic effects, the minimization of their impact and the quantification of their remaining effect on the polarization data. At the end of this paper, we shortly illustrate the quality of the scientific observations obtained during this first flight, at the current stage of systematic effect removal.
Published: 2016

16. PILOT: a balloon-borne experiment to measure the polarized FIR emission of dust grains in the interstellar medium

Author: J. Pimentao, G. Parot, L. Montier, J. Aumont, Bruno Maffei, M. Bouzit, L. Bautista, R. Misawa, B. Crane, B. Leriche, S. Grabarnik, A. Caillat, Nicolas Ponthieu, M. Charra, F. Bousquet, Peter Charles Hargrave, Giampaolo Pisano, Y. Lepennec, J. Narbonne, S. Maestre, Y. André, Maria Salatino, O. Simonella, F. Mirc, F. Douchin, A. Hughes, J.-P. Bernard, Matthew Joseph Griffin, P. Etcheto, Peter A. R. Ade, J. A. Tauber, Giorgio Savini, Carole Tucker, P. Gélot, G. Foënard, G. Roudil, J. P. Crussaire, W. Marty, C. Engel, Muriel Saccoccio, M. Chaigneau, F. Pajot, J. M. Nicot, Y. Longval, Isabelle Ristorcelli, L. Rodriguez, O. Boulade, P. de Bernardis, J.-P. Torre, Silvia Masi, Johan Montel, J. Martignac, E. Pérot, Nicolas Bray, B. Mot, V. Buttice, C. Marty, E. Doumayrou, René J. Laureijs, J.-P. Dubois, and P. Tapie
Subjects: Cosmic microwave background, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Cosmology, Space exploration, law.invention, 010309 optics, law, instrumentation, interstellar medium, polarization, Astronomy and Astrophysics, Space and Planetary Science, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, Pilot experiment, Bolometer, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Polarization (waves), Galaxy, Interstellar medium
Abstract: Future cosmology space missions will concentrate on measuring the polarization of the Cosmic Microwave Background, which potentially carries invaluable information about the earliest phases of the evolution of our universe. Such ambitious projects will ultimately be limited by the sensitivity of the instrument and by the accuracy at which polarized foreground emission from our own Galaxy can be subtracted out. We present the PILOT balloon project, which aims at characterizing one of these foreground sources, the polarized continuum emission by dust in the diffuse interstellar medium. The PILOT experiment also constitutes a test-bed for using multiplexed bolometer arrays for polarization measurements. This paper presents the instrument and its expected performances. Performance measured during ground calibrations of the instrument and in flight will be described in a forthcoming paper.
Published: 2016

17. Clathrate hydrates : ftir spectroscopy for astrophysical remote detection

Author: Emmanuel Dartois, Bernard Schmitt, and M. Bouzit
Subjects: Physics, Solar System, Clathrate hydrate, General Engineering, Astronomy and Astrophysics, Mars Exploration Program, Dissociation (chemistry), Methane, Astrobiology, chemistry.chemical_compound, chemistry, Space and Planetary Science, Planet, Desorption, Physics::Space Physics, Sublimation (phase transition), Astrophysics::Earth and Planetary Astrophysics, Physics::Chemical Physics
Abstract: Clathrate hydrate early entered the field of space astrophysics as they were suggested to explain the anomalous desorption behaviour of gaseous parent molecules in comets by providing a dissociation pressure curve intermediate between the pure compound sublimation equilibrium and the water ice phase. It is nowadays the source for many astrophysical investigations with application ranging from explaining giant planets (and/or their satellites) observed molecular abundances, the possible occurrence of Mars carbon dioxide/methane clathrates or ethane sequestration on the Saturn's moon Titan. We experimentally investigate near to mid-infrared spectroscopic signature of clathrates in the low temperature range adapted to these icy bodies of our solar system. We discuss the implications for space-based astrophysical satellites or probes remote sensing in order to constrain their possible presence.
Published: 2012
Full Text: View/download PDF

18. ON A THIRD ORDER PARABOLIC EQUATION WITH NONLOCAL BOUNDARY CONDITIONS

Author: M BOUZIT and N TEYAR
Subjects: Energy Inequalities, lcsh:T, Integral Boundary Condition, Parabolic equation of mixed type, lcsh:Q, lcsh:Science, lcsh:Technology
Abstract: In this paper, we study a mixed problem for a third order parabolic equation with non classical boundary condition. We prove the existence and uniqueness of the solution. The proof of the uniqueness is based on a priori estimate and the existence is established by Fourier’s method.
Published: 2011

19. Low temperature CH4 and CO2 clathrate hydrate near to mid-IR spectra

Author: M. Bouzit, Emmanuel Dartois, D. Deboffle, and Bernard Schmitt
Subjects: Space and Planetary Science, Chemistry, Clathrate hydrate, Mineralogy, Infrared spectroscopy, Physical chemistry, Astronomy and Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Spectral line
Abstract: The physical behaviour of methane and carbon dioxide clathrate hydrates, specific crystallographic ice crystals are of major importance for the earth and may control the stability of gases in many astrophysical bodies such as the planets, comets and possibly interstellar grains. Such models claim they provide an alternative trapping mechanism modifying the absolute and relative composition of icy bodies and can be at the source of late time injection of gaseous species in planetary atmospheres. However, there is a clear need to detect them directly. We provide in this study the laboratory recorded signatures of clathrate hydrates in the near to mid-infrared for astrophysical remote detection. These laboratory experiments will in a near future allow to follow the kinetic formation by diffusion in dedicated experiments, another important step to implement, to understand and model their possible presence in space.
Published: 2009
Full Text: View/download PDF

20. PILOT: a balloon-borne experiment to measure the polarized FIR emission of dust grains in the interstellar medium

Author: M. Bouzit, Matthew Joseph Griffin, Peter A. R. Ade, C. Marty, W. Marty, Peter Charles Hargrave, Giampaolo Pisano, Jean-Pierre Dubois, Maria Salatino, Y. André, B. Crane, R. Misawa, Carole Tucker, B. Leriche, M. Charra, C. Engel, J. Narbonne, J.-P. Bernard, L. Rodriguez, Silvia Masi, F. Pajot, I. Ristorcelli, Nicolas Ponthieu, G. Roudil, S. Maes, Giorgio Savini, P. de Bernardis, Y. Longval, and B. Mot
Subjects: FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Space exploration, Cosmology, law.invention, law, Polarization, Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysique, Astrophysics::Galaxy Astrophysics, Physics, COSMIC cancer database, Pilot experiment, Intrumentation, Applied Mathematics, Bolometer, Computer Science Applications1707 Computer Vision and Pattern Recognition, Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Polarization (waves), Galaxy, Interstellar medium, Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Optics, Optics (physics.optics)
Abstract: Future cosmology space missions will concentrate on measuring the polarization of the Cosmic Microwave Background, which potentially carries invaluable information about the earliest phases of the evolution of our universe. Such ambitious projects will ultimately be limited by the sensitivity of the instrument and by the accuracy at which polarized foreground emission from our own Galaxy can be subtracted out. We present the PILOT balloon project which will aim at characterizing one of these foreground sources, the polarization of the dust continuum emission in the diffuse interstellar medium. The PILOT experiment will also constitute a test-bed for using multiplexed bolometer arrays for polarization measurements. We present the results of ground tests obtained just before the first flight of the instrument., Comment: 17 pages, 13 figures. Presented at SPIE, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII. To be published in Proc. SPIE volume 9153
Published: 2014
Full Text: View/download PDF

21. Une nouvelle méthode de posturographie dynamique pour quantifier la qualité de l’équilibre

Author: J. Ma, Viviane Pasqui, Philippe Thoumie, A. Flavia Gomes Paiva, H. Kharboutly, and M. Bouzit
Subjects: Neurology, Physiology (medical), Rehabilitation, Orthopedics and Sports Medicine, Neurology (clinical), General Medicine
Abstract: Introduction La posturographie dynamique devient de plus en plus un besoin, puisqu’elle nous apporte des informations plus precises sur l’evaluation de l’equilibre. Notre objectif est de quantifier la qualite de l’equilibre chez les patients presentant des atteintes sensorielles ou motrices en utilisant une nouvelle methode de posturographie dynamique. Materiel et methode On a compare les mesures de posturographie de 3 groupes : 8 sujets neuropathie sensitive, 8 sujets myopathie et 8 sujets sains. La mesure de posturographie a ete realisee avec la plate-forme IsiMove. Le protocole consiste en 5 exercices qui se repetent pour 5 frequences (de 0,1 Hz a 0,5 Hz). Les exercices sont appliques d’une facon successive : une inclinaison antero-posterieur, une inclinaison medio-laterale, une translation antero-posterieur, une rotation verticale et une translation medio-laterale. Un intervalle de normalite a ete elabore avec les mesures des surfaces des sujets sains. Un sujet a une note 5 si la valeur de la surface mesuree est dans l’intervalle ; 2 si la valeur est a l’exterieur et 0 s’il ne realise pas l’exercice. Chaque sujet a donc un score final de quantification (la somme de notes attribuees a chaque exercice). Resultats et discussion Les neuropathes ont obtenu des scores entre 0 et 107 et les myopathes entre 0 et 95. Nous avons choisi une representation schematique en etoile qui permet d’analyser la qualite d’equilibre en comparant les trois groupes.
Published: 2014
Full Text: View/download PDF

22. Clathrate hydrate FTIR spectroscopy - infrared signatures, astrophysical significance

Author: Ph. Duret, Bernard Schmitt, M. Bouzit, and Emmanuel Dartois
Subjects: Environmental Engineering, lcsh:QP1-981, Chemistry, Infrared, Clathrate hydrate, lcsh:QR1-502, Permafrost, Industrial and Manufacturing Engineering, lcsh:Microbiology, lcsh:Physiology, Astrobiology, Planet, lcsh:Zoology, Astrophysics::Earth and Planetary Astrophysics, lcsh:QL1-991, Fourier transform infrared spectroscopy, Inclusion (mineral), Earth (classical element)
Abstract: Clathrate hydrates, ice inclusion compounds, are of major importance for the Earth’s permafrost regions and may control the stability of gases in many astrophysical bodies such as the planets, comets and possibly interstellar grains. Their physical behavior may provide a trapping mechanism to modify the absolute and relative composition of icy bodies that could be the source of late-time injection of gaseous species in planetary atmospheres or hot cores. In this study, we provide and discuss laboratory-recorded infrared signatures of clathrate hydrates in the near to mid-infrared and the implications for space-based astrophysical tele-detection in order to constrain their possible presence.
Published: 2014

23. Évaluation de l’équilibre des sujets hémiplégiques sur une plateforme de posturographie dynamique robotisée « IsiMove »

Author: A.F. Gomes Paiva, G. Robain, M. Bouzit, Haissam Kharboutly, Viviane Pasqui, and Philippe Thoumie
Subjects: Rehabilitation, Orthopedics and Sports Medicine
Published: 2013
Full Text: View/download PDF

24. Balance assessment of hemiplegic subjects on a robotic dynamic posturography platform 'IsiMove'

Author: Viviane Pasqui, G. Robain, Haissam Kharboutly, Philippe Thoumie, A.F. Gomes Paiva, and M. Bouzit
Subjects: Balance, Balance assessment, medicine.medical_specialty, Physical medicine and rehabilitation, Dynamic platform, Posturography, Rehabilitation, medicine, Hemiplegia, Orthopedics and Sports Medicine, Psychology, Balance (ability), Robotic
Published: 2013
Full Text: View/download PDF

25. The molecular hydrogen explorer H2EX

Author: F. Boulanger, J. P. Maillard, P. Appleton, E. Falgarone, G. Lagache, B. Schulz, B. P. Wakker, A. Bressan, J. Cernicharo, V. Charmandaris, L. Drissen, G. Helou, T. Henning, T. L. Lim, E. A. Valentjin, A. Abergel, J. Le Bourlot, M. Bouzit, S. Cabrit, F. Combes, J. M. Deharveng, P. Desmet, H. Dole, C. Dumesnil, A. Dutrey, J. J. Fourmond, E. Gavila, R. Grangé, C. Gry, P. Guillard, S. Guilloteau, E. Habart, B. Huet, C. Joblin, M. Langer, Y. Longval, S. C. Madden, C. Martin, M. A. Miville-Deschênes, G. Pineau des Forêts, E. Pointecouteau, H. Roussel, L. Tresse, L. Verstraete, F. Viallefond, F. Bertoldi, J. Jorgensen, J. Bouwman, A. Carmona, O. Krause, A. Baruffolo, C. Bonoli, F. Bortoletto, L. Danese, G. L. Granato, C. Pernechele, R. Rampazzo, L. Silva, G. de Zotti, J. Pardo, M. Spaans, F. F. S. van der Tak, W. Wild, M. J. Ferlet, S. K. Ramsay Howat, M. D. Smith, B. Swinyard, G. S. Wright, G. Joncas, P. G. Martin, C. J. Davis, B. T. Draine, P. F. Goldsmith, A. K. Mainzer, P. Ogle, S. A. Rinehart, G. J. Stacey, A. G. G. M. Tielens, Institut d'astrophysique spatiale ( IAS ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Infrared Processing and Analysis Center ( IPAC ), California Institute of Technology ( CALTECH ), Laboratoire de Radioastronomie ( LRA ), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris ( FRDPENS ), Centre National de la Recherche Scientifique ( CNRS ) -École normale supérieure - Paris ( ENS Paris ) -Centre National de la Recherche Scientifique ( CNRS ) -École normale supérieure - Paris ( ENS Paris ), INAF - Osservatorio Astronomico di Padova ( OAPD ), Istituto Nazionale di Astrofisica ( INAF ), Centro de Investigaciones Biológicas ( CSIC ), Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique ( LERMA ), École normale supérieure - Paris ( ENS Paris ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université de Cergy Pontoise ( UCP ), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique ( CNRS ), D´epartement de Physique, de G´enie Physique et d'Optique and Observatoire du mont M´egantic, Université Laval, Max-Planck-Institut für Astronomie ( MPIA ), STFC Rutherford Appleton Laboratory ( RAL ), Science and Technology Facilities Council ( STFC ), Laboratoire d'Astrophysique de Marseille ( LAM ), Aix Marseille Université ( AMU ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National d'Etudes Spatiales ( CNES ) -Centre National de la Recherche Scientifique ( CNRS ), Dauphine Recherches en Management ( DRM ), Université Paris-Dauphine-Centre National de la Recherche Scientifique ( CNRS ), Observatoire aquitain des sciences de l'univers ( OASU ), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Astrophysique de Bordeaux [Pessac] ( LAB ), Université de Bordeaux ( UB ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux ( L3AB ), Thales Alenia Space, Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ), Centre d'étude spatiale des rayonnements ( CESR ), Université Paul Sabatier - Toulouse 3 ( UPS ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée ( DAPNIA ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Institut d'Astrophysique de Paris ( IAP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Leiden Observatory [Leiden], Universiteit Leiden [Leiden], Centro Nacional de Aceleradores, inconnu, Inconnu, Department of Mathematical Sciences, University of Bath, University of Bath [Bath], Max-Planck-Institut für Radioastronomie ( MPIFR ), Centre for Astrophysics and Planetary Science [Canterbury] ( CAPS ), University of Kent [Canterbury], Laboratoire des Lois de Comportement du Combustible ( LLCC ), Space Science and Technology Department [Didcot] ( RAL Space ), Science and Technology Facilities Council ( STFC ) -Science and Technology Facilities Council ( STFC ), National Center of Soybean Biotechnology, University of Missouri-Columbia, SRON Netherlands Institute for Space Research ( SRON ), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Infrared Processing and Analysis Center (IPAC), California Institute of Technology (CALTECH), Laboratoire de Radioastronomie (LRA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), Centro de Investigaciones Biológicas (CSIC), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Université Laval [Québec] (ULaval), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Dauphine Recherches en Management (DRM), Université Paris Dauphine-PSL-Centre National de la Recherche Scientifique (CNRS), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB), Thales Alenia Space [Cannes], Centre d'étude spatiale des rayonnements (CESR), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées, Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut d'Astrophysique de Paris (IAP), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Max-Planck-Institut für Radioastronomie (MPIFR), Centre for Astrophysics and Planetary Science [Canterbury] (CAPS), Laboratoire de Modélisation Multi-échelles des Combustibles (LM2C), Service d'Etudes de Simulation du Comportement du combustibles (SESC), Département d'Etudes des Combustibles (DEC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Département d'Etudes des Combustibles (DEC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Space Science and Technology Department [Didcot] (RAL Space), Science and Technology Facilities Council (STFC)-Science and Technology Facilities Council (STFC), University of Missouri [Columbia], University of Missouri System-University of Missouri System, SRON Netherlands Institute for Space Research (SRON), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, Université Paris sciences et lettres (PSL), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
Subjects: Active galactic nucleus, Cosmic Vision, [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], FOS: Physical sciences, Star formation, Galaxies, ISM, Disks, Astronomical instrumentation, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, symbols.namesake, Planet, Galaxy formation and evolution, Spectral resolution, Planck, Astrophysics::Galaxy Astrophysics, Physics, Molecular cloud, Astrophysics (astro-ph), Astronomy and Astrophysics, [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Galaxy, [ PHYS.ASTR.EP ] Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU]Sciences of the Universe [physics], Space and Planetary Science, symbols, Astrophysics::Earth and Planetary Astrophysics
Abstract: The Molecular Hydrogen Explorer, H2EX, was proposed in response to the ESA 2015 - 2025 Cosmic Vision Call as a medium class space mission with NASA and CSA participations. The mission, conceived to understand the formation of galaxies, stars and planets from molecular hydrogen, is designed to observe the first rotational lines of the H2 molecule (28.2, 17.0, 12.3 and 9.7 micron) over a wide field, and at high spectral resolution. H2EX can provide an inventory of warm (> 100 K) molecular gas in a broad variety of objects, including nearby young star clusters, galactic molecular clouds, active galactic nuclei, local and distant galaxies. The rich array of molecular, atomic and ionic lines, as well as solid state features available in the 8 to 29 micron spectral range brings additional science dimensions to H2EX. We present the optical and mechanical design of the H2EX payload based on an innovative Imaging Fourier Transform Spectrometer (IFTS) fed by a 1.2m telescope. The 20'x20' field of view is imaged on two 1024x1024 Si:As detectors. The maximum resolution of 0.032 cm^-1 (FWHM) means a velocity resolution of 10 km s^-1 for the 0-0 S(3) line at 9.7 micron. This instrument offers the large field of view necessary to survey extended emission in the Galaxy and local Universe galaxies as well as to perform unbiased extragalactic and circumstellar disks surveys. The high spectral resolution makes H2EX uniquely suited to study the dynamics of H2 in all these environments. The mission plan is made of seven wide-field spectro-imaging legacy programs, from the cosmic web to galactic young star clusters, within a nominal two years mission. The payload has been designed to re-use the Planck platform and passive cooling design., Accepted for publication in Experimental Astronomy special issue on Cosmic Vision Proposals, 19 pages and 9 figures
Published: 2009
Full Text: View/download PDF

26. IsiMove : une nouvelle plateforme de perturbation posturale

Author: M. Bouzit, Philippe Thoumie, Jianting Ma, A.F. Gomes Paiva, Haissam Kharboutly, and Viviane Pasqui
Subjects: Commande, Evaluation d’équilibre, Rehabilitation, Plateforme, Orthopedics and Sports Medicine, Posturographie dynamique
Published: 2013
Full Text: View/download PDF

27. A new dynamic posturography method to quantify the quality of balance

Author: H. Kharboutly, Viviane Pasqui, A. Flavia Gomes Paiva, M. Bouzit, J. Ma, and Philippe Thoumie
Subjects: medicine.medical_specialty, Dynamic posturography, genetic structures, Computer science, media_common.quotation_subject, education, Rehabilitation, Posturography, eye diseases, Physical medicine and rehabilitation, medicine, Balance evaluation, Orthopedics and Sports Medicine, Quality (business), media_common, Balance (ability)
Published: 2014
Full Text: View/download PDF

28. IsiMove: A new platform of postural disturbance

Author: Haissam Kharboutly, A.F. Gomes Paiva, Viviane Pasqui, M. Bouzit, Jianting Ma, and Philippe Thoumie
Subjects: Commands, medicine.medical_specialty, Balance assessment, Dynamic posturography, Physical medicine and rehabilitation, Disturbance (geology), Platform, Rehabilitation, medicine, Environmental science, Orthopedics and Sports Medicine
Published: 2013
Full Text: View/download PDF

29. Methane clathrate hydrate infrared spectrum

Author: M. Bouzit, D. Deboffle, and Emmanuel Dartois
Subjects: Physics, 010504 meteorology & atmospheric sciences, Methane clathrate, Infrared, Interstellar ice, Clathrate hydrate, Infrared spectroscopy, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, 7. Clean energy, Methane, chemistry.chemical_compound, Nuclear magnetic resonance, chemistry, 13. Climate action, Space and Planetary Science, Chemical physics, 0103 physical sciences, Hydrate, Spectroscopy, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences
Abstract: Context. Recently, we recorded the infrared spectrum of the methane clathrate hydrate stretching mode at low temperature, a caged compound of possible interest for solar system studies as well as interstellar ice mantles.Aims. We provide a practical infrared spectroscopic identification for methane clathrate hydrate to examine its astrophysical presence or absence. We investigate the crystal field induced shifts, and assign the different transitions to the different encaged molecules environments in this clathrate hydrate.Methods. A methane clathrate crystal is produced in an infrared transmitting moderate-pressure closed cell. Using Fourier transform infrared (FTIR) spectroscopy, the overtones (3ν 4 , 2ν 3 ) and combination modes (ν 2 +2ν 4 , ν 1 +ν 4 , ν 3 +ν 4 , ν 2 +ν 3 , ν 3 +2ν 4 , 2ν 2 +2ν 4 , ν 2 +ν 3 +ν 4 ) falling in the 6000–3000 cm-1 (~1.65–3.4 μ m) and their temperature behaviour are investigated. In addition, non-astrophysical CH4 /CF4 gas mixtures are used to build clathrates with different methane large and small cage occupancies to help in assignments.Results. Combination modes show the two distinct cages and the quasi-free rotor low temperature ro-vibrational structure expected for methane clathrate hydrates. A comparison with the pure phase I is performed. Implications for methane clathrate hydrate detection are clearly identified.Conclusions. Solid methane actual remote observations of solar system objects surfaces do not display the clathrate hydrates' specific shift and occupancy signatures. Observationnally, a search for their infrared spectroscopic specific signatures should be performed, focusing on thermodynamically favourable objects like trans- neptunian objects (TNOs) or recently exposed (e.g. fresh impact) planet (or their satellites) surfaces. On the modeling side, efforts must be undertaken to progressively implement clathrate formation kinetics.
Published: 2010
Full Text: View/download PDF

30. Filtergraph Calibration for the Polarimetric and Helioseismic Imager

Author: Regis Le Cocguen, Carlos Dominguez-Tagle, Jean-Jacques Fourmond, Anne Philippon, M. Bouzit, Jean-Christophe Le Clec'h, Thierry Appourchaux, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université Pierre et Marie Curie - Paris 6 - UFR de Médecine Pierre et Marie Curie (UPMC), Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Polarimetry, Filtergraph, 02 engineering and technology, 01 natural sciences, Spectral line, 010305 fluids & plasmas, law.invention, Orbiter, Heliophysics, 0203 mechanical engineering, law, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Helioseismology, Instrumentation, Remote sensing, Physics, [PHYS]Physics [physics], 020301 aerospace & aeronautics, Spacecraft, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Polarization (waves), Radial velocity, Physics::Space Physics, Solar Orbiter, Astrophysics::Earth and Planetary Astrophysics, business, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: International audience; Solar Orbiter mission will study the Sun to the proximity of 0.28 AU, reaching solar latitudes up to 34Â°. This spacecraft will be launched in 2017 and will represent a complete approach to heliophysics. The Polarimetric and Helioseismic Imager (PHI), on board of Solar Orbiter, will provide the most important data for helioseismology. PHI will measure the photospheric vector magnetic field and the line-of-sight velocity observing the FeI 6173 A absorption line with a narrowband filtergraph (FG). At different spectral positions, the polarization state of the incoming light will be analyzed. The FG will provide a tuning range to compensate the spacecraft radial velocity and to scan the continuum at both sides of the absorption line. Thus, the fine tuning of the FG is essential for the instrument performance. Here we present the FG characterization and calibration status as they represent an important milestone in the development of the instrument.

31. The polarimetric and helioseismic imager on solar orbiter

Author: Reiner Volkmer, B. Dávila, J. Bosch, J. Villanueva, V. Hervier, D. Roma, C. Campuzano, E. Nakai, Kinga Albert, N. Szwec, I. Vera, Andreas Lagg, T. Scheiffelen, Stephan Werner, P. Rodríguez Martínez, D. Osorno Caudel, J. Barandiarán, Javier Piqueras, T. Appourchaux, R. Le Cocguen, P. García Parejo, A. Sánchez, A. Núñez Peral, Joachim Woch, R. Muller, Dirk Soltau, L. R. Bellot Rubio, J. L. Gasent Blesa, Achim Gandorfer, Johann Hirzberger, J. Blanco Rodríguez, J. C. del Toro Iniesta, A. Fernández-Medina, M. Herranz, H. Laguna, R. Enge, M. Carmona, M. Kolleck, R. Meller, D. Hernández Expósito, Sami K. Solanki, M. Balaguer Jiménez, J.-J. Fourmond, T. Maue, J. P. Cobos Carracosa, K. Heerlein, Dan Yang, B. Fiethe, S. Frahm, V. Martínez Pillet, Udo Schühle, Uwe Beckmann, M. Monecke, M. Royo, D. Orozco Suárez, B. Aparicio, Wolfgang Schmidt, D. Germerott, Björn Löptien, D. Oberdorfer, J. Bochmann, I. Zouganelis, F. Heidecke, R. Navarro, Manuel Silva-López, D. Busse, S. Ramanath, Michael Sigwarth, A. Casas, Ioanna Papagiannaki, Jesper Schou, Marc Chaigneau, A. Philippon, Juan L. Ramos, Isabel Pérez-Grande, S. Meyer, P. Boumier, E. Sanchis Kilders, Gustavo Alonso, J. C. Le Clec’h, G. Baranjuk, Ignacio Torralbo, Harald Michalik, Daniel Müller, M.-F. Müller, Carlos Dominguez-Tagle, Laurent Gizon, J.M. Gomez Cama, P. Labrousse, D. Garranzo-García, D. Álvarez García, L. Guerrero, Y. Guan, M. Bergmann, J. Baumgartner, Jan Staub, Th. Berkefeld, J. A. Martín, A. Herms, M. Alvarez Copano, Alberto Álvarez-Herrero, M. Bouzit, V. Domingo, A. Ferreres Sabater, S. Fahmy, Germán Fernández-Rico, María Cebollero, M. Sperling, W. Deutsch, F. Girela, V. Buttice, J. A. Bonet, J. Heinrichs, Alexander Bell, T. Lange, L. Bastide, H. Michel, Alejandro M. Gomez-San-Juan, J. Bischoff, C. Ruiz de Galarreta, Andreas Zerr, Thimo Meierdierks, B. Grauf, A. C. López Jiménez, Centros de Excelencia Severo Ochoa, INSTITUTO DE ASTROFISICA DE ANDALUCIA (IAA), SEV-2017-0709, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Centre National D'Etudes Spatiales (CNES), Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and Ministerio de Ciencia, Innovación y Universidades
Subjects: Solar Telescope, 010504 meteorology & atmospheric sciences, photosphere [Sun], Filtegrams, Highly elliptical orbit, FOS: Physical sciences, Astrophysics, 01 natural sciences, law.invention, Telescope, Orbiter, Photosphere, law, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Helioseismology, Solar dynamo, 010303 astronomy & astrophysics, Sun: magnetic fields, Instrumentation and Methods for Astrophysics (astro-ph.IM), 0105 earth and related environmental sciences, Sun: helioseismology, Physics, [PHYS]Physics [physics], Ellipsometry, polarimeters [Instrumentation], Spacecraft, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, instrumentation: polarimeters, Sun: photosphere, Heliosismologia, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, techniques: polarimetric, magnetic fields [Sun], Space and Planetary Science, techniques: imaging spectroscopy, Astrophysics of Galaxies (astro-ph.GA), Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, business, Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Heliosphere, El·lipsometria
Abstract: This paper describes the Polarimetric and Helioseismic Imager on the Solar Orbiter mission (SO/PHI), the first magnetograph and helioseismology instrument to observe the Sun from outside the Sun-Earth line. It is the key instrument meant to address the top-level science question: How does the solar dynamo work and drive connections between the Sun and the heliosphere? SO/PHI will also play an important role in answering the other top-level science questions of Solar Orbiter, as well as hosting the potential of a rich return in further science. SO/PHI measures the Zeeman effect and the Doppler shift in the FeI 617.3nm spectral line. To this end, the instrument carries out narrow-band imaging spectro-polarimetry using a tunable LiNbO_3 Fabry-Perot etalon, while the polarisation modulation is done with liquid crystal variable retarders (LCVRs). The line and the nearby continuum are sampled at six wavelength points and the data are recorded by a 2kx2k CMOS detector. To save valuable telemetry, the raw data are reduced on board, including being inverted under the assumption of a Milne-Eddington atmosphere, although simpler reduction methods are also available on board. SO/PHI is composed of two telescopes; one, the Full Disc Telescope (FDT), covers the full solar disc at all phases of the orbit, while the other, the High Resolution Telescope (HRT), can resolve structures as small as 200km on the Sun at closest perihelion. The high heat load generated through proximity to the Sun is greatly reduced by the multilayer-coated entrance windows to the two telescopes that allow less than 4% of the total sunlight to enter the instrument, most of it in a narrow wavelength band around the chosen spectral line., Comment: 36 pages, 41 figures
Full Text: View/download PDF

32. Design of multiple axis robotic platform for postural stability analysis.

Author: Kharboutly H, Ma J, Benali A, Thoumie P, Pasqui V, and Bouzit M
Subjects: Adult, Algorithms, Biomechanical Phenomena, Equipment Design, Female, Humans, Male, Middle Aged, Models, Statistical, Proprioception, Rehabilitation instrumentation, Rotation, Software, Stroke Rehabilitation, Postural Balance physiology, Robotics
Abstract: This paper presents the design and implementation of IsiMove, a new dynamic posturography platform. It allows the evaluation of the static and dynamic balance of a human placed on a force plate. IsiMove is a robotic platform open kinematic with four degrees of freedom: anteroposterior tilt, mediolateral tilt, vertical rotation, and horizontal translation. It is capable of measuring the displacement of the center of pressure over time, with a resolution of 0.1 mm for each foot and support a human of about 120 kg. IsiMove can generate various types of balance perturbations based on parameters such as direction, amplitude, frequency and shape. In this paper, we will give a description of the mechanisms that constitute our platform. First, the technical specifications of the hardware and software architecture will be presented. Then, we will provide details related to extensive experimental evaluations of the platform in both static and dynamic condition as well as result of postural stability analysis with healthy subjects and stroke patients.
Published: 2015
Full Text: View/download PDF

33. Bench test evaluation of adaptive servoventilation devices for sleep apnea treatment.

Author: Zhu K, Kharboutly H, Ma J, Bouzit M, and Escourrou P
Subjects: Cheyne-Stokes Respiration therapy, Humans, Intermittent Positive-Pressure Ventilation instrumentation, Polysomnography, Sleep Apnea, Central therapy, Intermittent Positive-Pressure Ventilation methods, Sleep Apnea Syndromes therapy
Abstract: Rationale: Adaptive servoventilation devices are marketed to overcome sleep disordered breathing with apneas and hypopneas of both central and obstructive mechanisms often experienced by patients with chronic heart failure. The clinical efficacy of these devices is still questioned., Study Objectives: This study challenged the detection and treatment capabilities of the three commercially available adaptive servoventilation devices in response to sleep disordered breathing events reproduced on an innovative bench test., Methods: The bench test consisted of a computer-controlled piston and a Starling resistor. The three devices were subjected to a flow sequence composed of central and obstructive apneas and hypopneas including Cheyne-Stokes respiration derived from a patient. The responses of the devices were separately evaluated with the maximum and the clinical settings (titrated expiratory positive airway pressure), and the detected events were compared to the bench-scored values., Results: The three devices responded similarly to central events, by increasing pressure support to raise airflow. All central apneas were eliminated, whereas hypopneas remained. The three devices responded differently to the obstructive events with the maximum settings. These obstructive events could be normalized with clinical settings. The residual events of all the devices were scored lower than bench test values with the maximum settings, but were in agreement with the clinical settings. However, their mechanisms were misclassified., Conclusion: The tested devices reacted as expected to the disordered breathing events, but not sufficiently to normalize the breathing flow. The device-scored results should be used with caution to judge efficacy, as their validity depends upon the initial settings.
Published: 2013
Full Text: View/download PDF

34. Use of Magnetorheological fluid in a force feedback glove.

Author: Winter SH and Bouzit M
Subjects: Equipment Design, Equipment Failure Analysis, Feedback physiology, Hand, Humans, Man-Machine Systems, Transducers, User-Computer Interface, Artificial Limbs, Clothing, Magnetics instrumentation, Physical Stimulation instrumentation, Rheology instrumentation, Robotics instrumentation, Touch physiology
Abstract: Magnetorheological fluid (MRF) is a smart material that has the property of changing its viscosity when exposed to a magnetic field. By placing this fluid into a sealed cylinder with an electromagnet piston as a core, a controllable resistance motion dampener can be created. A novel exoskeleton mechanical power transmission system was designed, utilizing rapid prototype parts, to transmit these resistive forces to the user's fingertips. A first iteration force feedback glove was developed and tested on human subjects for overall usability. The eventual goal of the system is to provide an alternative force producing system for exercises and rehabilitation. The entire system is lightweight, low power, and easily portable.
Published: 2007
Full Text: View/download PDF

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources

Refine your results

34 results on '"M. Bouzit"'

1. Effects of Different Shaped Cavities and Bumps on Flow Structure and Wing Performance

2. Contribution of insurance data to cost assessment of coastal flood damage to residential buildings: insights gained from Johanna (2008) and Xynthia (2010) storm events

3. L'évaluation économique des risques torrentiels : intérêts et limites pour les choix collectifs de prévention

4. Effect of thermal buoyancy on flow pattern from a pair of side-by-side confined triangular cylinders

5. The Solar Orbiter EUI instrument: The Extreme Ultraviolet Imager (Corrigendum)

6. The Solar Orbiter EUI instrument: The Extreme Ultraviolet Imager

7. Inflight performance of the PILOT balloon-borne experiment

8. Definition of a metrology servo-system for a solar imaging fourier transform spectrometer working in the far UV (IFTSUV)

9. Pilot, a balloon borne experiment underground tests

10. PILOT: optical performance and end-to-end characterisation

11. Pilot optical alignment

12. The PILOT optical alignment for its first flight

13. The optical performance of the PILOT instrument from ground end‐to‐end tests

14. CFD study of the effect of Baffles on the energy consumption and the flow structure in a vessel stirred by a Rushton turbine

15. Inflight performance of the PILOT balloon-borne experiment

16. PILOT: a balloon-borne experiment to measure the polarized FIR emission of dust grains in the interstellar medium

17. Clathrate hydrates : ftir spectroscopy for astrophysical remote detection

18. ON A THIRD ORDER PARABOLIC EQUATION WITH NONLOCAL BOUNDARY CONDITIONS

19. Low temperature CH4 and CO2 clathrate hydrate near to mid-IR spectra

20. PILOT: a balloon-borne experiment to measure the polarized FIR emission of dust grains in the interstellar medium

21. Une nouvelle méthode de posturographie dynamique pour quantifier la qualité de l’équilibre

22. Clathrate hydrate FTIR spectroscopy - infrared signatures, astrophysical significance

23. Évaluation de l’équilibre des sujets hémiplégiques sur une plateforme de posturographie dynamique robotisée « IsiMove »

24. Balance assessment of hemiplegic subjects on a robotic dynamic posturography platform 'IsiMove'

25. The molecular hydrogen explorer H2EX

26. IsiMove : une nouvelle plateforme de perturbation posturale

27. A new dynamic posturography method to quantify the quality of balance

28. IsiMove: A new platform of postural disturbance

29. Methane clathrate hydrate infrared spectrum

30. Filtergraph Calibration for the Polarimetric and Helioseismic Imager

31. The polarimetric and helioseismic imager on solar orbiter

32. Design of multiple axis robotic platform for postural stability analysis.

33. Bench test evaluation of adaptive servoventilation devices for sleep apnea treatment.

34. Use of Magnetorheological fluid in a force feedback glove.

Catalog

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Publication Type

Journal

Database

Publisher

34 results on '"M. Bouzit"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources