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1. Social Unacceptability for Simple Voting Procedures

Author

Awde, Ahmad, Diss, Mostapha, Kamwa, Eric, Rolland, Julien Yves, Tlidi, Abdelmonaim, Fleurbaey, Marc, Editor-in-Chief, Salles, Maurice, Editor-in-Chief, Dutta, Bhaskar, Series Editor, Gaertner, Wulf, Series Editor, Herrero Blanco, Carmen, Series Editor, Klaus, Bettina, Series Editor, Pattanaik, Prasanta K., Series Editor, Thomson, William, Series Editor, Kurz, Sascha, editor, Maaser, Nicola, editor, and Mayer, Alexander, editor

Published
2023
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2. One Algorithm to Rule Them All? Defining Best Strategy for Land Surface Temperature Retrieval from NOAA-AVHRR Afternoon Satellites.

Author

Julien, Yves, Sobrino, José A., and Jiménez-Muñoz, Juan-Carlos

Subjects
*LAND surface temperature, *SURFACE analysis, *GLOBAL warming, *DATA libraries, *RADIOMETERS
Abstract

The NOAA-AVHRR (National Oceanographic and Atmospheric Administration–Advanced Very High-Resolution Radiometer) archive includes data from 1981 onwards, which allow for estimating land surface temperature (LST), a key parameter for the study of global warming as well as surface characterization. However, algorithms for LST retrieval were developed before the latest sensors and were based on more reduced atmospheric datasets. Here, we present 50 novel sets of coefficients for an LST retrieval algorithm from NOAA-AVHRR sensors, to which we added one historical methodology, which we validate against historical in situ as well as independent satellite data. This validation shows that the historical algorithm performs surprisingly well, with an in situ RMSE below 1.5 K and a quasi-null bias when compared with independent satellite data. A couple of the novel algorithms also perform within expectations (errors below 1.5 K), so any of these could be used for the complete processing of the AVHRR dataset. In our case, considering consistency with previous works, we opt for the use of the historical algorithm, now also tested for more recent periods. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Social unacceptability for simple voting procedures

Author

Awde, Ahmad, Diss, Mostapha, Kamwa, Eric, Rolland, Julien Yves, Tlidi, Abdelmonaim, and Kamwa, Eric

Subjects
Social Unacceptability, Scoring Rules, Voting, [SHS.ECO] Humanities and Social Sciences/Economics and Finance, Probability
Abstract

A candidate is said to be socially acceptable if the number of voters who rank her among the most preferred half of the candidates is at least as large as the number of voters who rank her among the least preferred half (Mahajne and Volij, 2018). For every voting profile, there always exists at least one socially acceptable candidate. This candidate may not be elected by some well-known voting rules, which may even lead in some cases to the election of a socially unacceptable candidate, the latter being a candidate such that the number of voters who rank her among the most preferred half of the candidates is strictly less than the number of voters who rank her among the least preferred half. In this paper, our contribution is twofold. First, since the existence of a socially unacceptable candidate is not always guaranteed, we determine the probabilities of the existence of such a candidate. Then, we evaluate how often the Plurality rule, the Negative Plurality rule, the Borda rule and their two-round versions can elect a socially unacceptable candidate. We perform our calculations under both the Impartial Culture and the Impartial Anonymous Culture

Published
2022

11. What It Takes to Be a Pseudomonas aeruginosa? The Core Genome of the Opportunistic Pathogen Updated.

Author

Benoît Valot, Christophe Guyeux, Julien Yves Rolland, Kamel Mazouzi, Xavier Bertrand, and Didier Hocquet

Subjects
Medicine, Science
Abstract

Pseudomonas aeruginosa is an opportunistic bacterial pathogen able to thrive in highly diverse ecological niches and to infect compromised patients. Its genome exhibits a mosaic structure composed of a core genome into which accessory genes are inserted en bloc at specific sites. The size and the content of the core genome are open for debate as their estimation depends on the set of genomes considered and the pipeline of gene detection and clustering. Here, we redefined the size and the content of the core genome of P. aeruginosa from fully re-analyzed genomes of 17 reference strains. After the optimization of gene detection and clustering parameters, the core genome was defined at 5,233 orthologs, which represented ~ 88% of the average genome. Extrapolation indicated that our panel was suitable to estimate the core genome that will remain constant even if new genomes are added. The core genome contained resistance determinants to the major antibiotic families as well as most metabolic, respiratory, and virulence genes. Although some virulence genes were accessory, they often related to conserved biological functions. Long-standing prophage elements were subjected to a genetic drift to eventually display a G+C content as higher as that of the core genome. This contrasts with the low G+C content of highly conserved ribosomal genes. The conservation of metabolic and respiratory genes could guarantee the ability of the species to thrive on a variety of carbon sources for energy in aerobiosis and anaerobiosis. Virtually all the strains, of environmental or clinical origin, have the complete toolkit to become resistant to the major antipseudomonal compounds and possess basic pathogenic mechanisms to infect humans. The knowledge of the genes shared by the majority of the P. aeruginosa isolates is a prerequisite for designing effective therapeutics to combat the wide variety of human infections.

Published
2015
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12. Healthy Aging Biomarkers: The INSPIRE's Contribution

Author

Vergnolle, Nathalie, Ader, Isabelle, Penicaud, Luc, Raymond Letron, Isabelle, Andrieu, Sandrine, Rolland, Julien Yves, Barreto De Souto, Philippe, Vellas, Bruno, Guyonnet, Sophie, Beard, J.R., Parini, Angelo, Davezac, Noélie, Dray, Cédric, Gourdy, P., Rampon, Claire, Valet, Phillippe, Fazilleau, Nicolas, Payoux, Pierre, Sierra, Felipe, Institut de Recherche en Santé Digestive (IRSD ), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Geroscience and rejuvenation research center (RESTORE), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-EFS-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Epidémiologie et analyses en santé publique : risques, maladies chroniques et handicaps (LEASP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM), Gérontopôle, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Toulouse [Toulouse], University of New South Wales [Sydney] (UNSW), Centre de Recherches sur la Cognition Animale (CRCA), Centre de Biologie Intégrative (CBI), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut des sciences du cerveau de Toulouse. (ISCT), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Institut Toulousain des Maladies Infectieuses et Inflammatoires (Infinity), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Toulouse Neuro Imaging Center (ToNIC), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hôpital Purpan [Toulouse], CHU Toulouse [Toulouse]-CHU Toulouse [Toulouse], Institut du Vieillissement, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Region Occitanie/Pyrenees-Mediterranee (Reference number: 1901175), European Regional Development Fund (ERDF) (Project number: MP0022856), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Centre de Recherches sur la Cognition Animale - UMR5169 (CRCA), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Centre de Biologie Intégrative (CBI), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Toulouse Mind & Brain Institut (TMBI), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Toulouse Mind & Brain Institut (TMBI), and SEGUIN, Nathalie

Subjects
[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, healthy aging, frailty, dependence, Biomarkers, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology, [SDV.BIO] Life Sciences [q-bio]/Biotechnology
Abstract

International audience; The find solutions for optimizing healthy aging and increase health span is one of the main challenges for our society. A novel healthcare model based on integration and a shift on research and care towards the maintenance of optimal functional levels are now seen as priorities by the WHO. To address this issue, an integrative global strategy mixing longitudinal and experimental cohorts with an innovative transverse understanding of physiological functioning is missing. While the current approach to the biology of aging is mainly focused on parenchymal cells, we propose that age-related loss of function is largely determined by three elements which constitute the general ground supporting the different specific parenchyma: i.e. the stroma, the immune system and metabolism. Such strategy that is implemented in INSPIRE projects can strongly help to find a composite biomarker capable of predicting changes in capacity across the life course with thresholds signalling frailty and care dependence.

Published
2021

15. NOAA-AVHRR orbital drift correction from solar zenithal angle data

Author

Sobrino, Jose A., Julien, Yves, Atitar, Mariam, and Nerry, Francoise

Subjects
Radiometers -- Analysis, Weather radar networks -- Analysis, Remote sensing -- Analysis, Business, Earth sciences, Electronics and electrical industries
Abstract

This paper presents a new method for NOAA's (National Ocean and Atmospheric Administration) orbital drift correction. This method is pixel-based, and in opposition with most methods previously developed, does not need explicit knowledge of land cover. This method is applied to AVHRR (Advanced Very High Resolution Radiometer) channel information, and relies only on the additional knowledge of solar zenithal angle (SZA) and acquisition date information. In a first step, anomalies in SZA and channel time series are retrieved, and screened out for anomalous values. Then, the part of the parameter anomaly which is explained by SZA anomaly is removed from the data, to estimate new parameter anomalies, and this iteratively until the influence of SZA anomalies is totally removed from the parameter data. This correction has been applied to bimonthly AVHRR data provided by the GIMMS group (Global Inventory Modeling and Mapping Studies), covering Africa from November 2000 to December 2006. NDVI and LST (Land Surface Temperature) have been estimated from raw and corrected data, and averaged over homogeneous vegetation classes. Differences between raw and corrected averaged parameters show an improvement in the quality of the data. In order to validate this method, a whole week (10 to 17 July 2004) of METEOSAT SEVIRI (Spinning Enhanced Visible and InfraRed Imager) data have been used, from which LST have been estimated using a similar method to the one used to retrieve LST from AVHRR data. The comparison between both platforms at the same time of acquisition shows good concordance. Index Terms--Land surface temperature (LST), national ocean and atmospheric administration (NOAA) advanced very high resolution radiometer (AVHRR), normalized vegetation difference index (NDVI), orbital drift, solar zenithal angle (SZA).

Published
2008

19. High-Temperature Radiative Behavior of an La2NiO4+δ Cathodic Layer for SOFCs (up to 900°C): Influence of δ and Texture

Author

Patrick Echegut, Florence Ansart, Leire del Campo, Stéphanie Touchefeu, Benoit Rousseau, Domingos De Sousa Meneses, Emmanuel Véron, Julien Yves Rolland, Pascal Lenormand, and Minh Tri Ta

Subjects
Materials science, Infrared, Oxide, Analytical chemistry, Thermodynamics, 02 engineering and technology, 021001 nanoscience & nanotechnology, 7. Clean energy, 01 natural sciences, chemistry.chemical_compound, chemistry, Operating temperature, Thermal radiation, 0103 physical sciences, Thermal, Materials Chemistry, Ceramics and Composites, Emissivity, Radiative transfer, Texture (crystalline), 010306 general physics, 0210 nano-technology
Abstract

Thermal radiation is likely to play an important role in the calculation of the energy balance in solid oxide fuel cells (SOFCs), due to their high operating temperatures (600°–1000°C). However, the majority of previous studies dealing with this issue have used room-temperature radiative data for determining the overall heat transfer process within a given cell, which could lead to an inexact appreciation of the role played by the thermal radiation. Consequently, the thermal field within the cell could also be incorrectly determined; however, accurate knowledge of the thermal field is important in order to understand the mechanical behavior of SOFCs. Several parameters, including chemical composition, texture, thickness, and of course operating temperature, have a large effect on the radiative properties of a given compound. As a first step to elucidate the temperature-dependent behavior of SOFCs, we deposited an La2NiO4+δ cathodic layer on a planar ZrO2–8% Y2O3 electrolyte-supported SOFC and investigated its radiative properties using high-temperature infrared emissivity spectroscopy (100°–900°C). Additional X-ray diffraction, thermo-gravimetric analysis, and environmental scanning electron microscopy measurements were also made to study the role played by both the chemical composition and texture on the radiative properties of the cell.

Published
2011

20. Diffusion approximation and short‐path statistics at low to intermediate Knudsen numbers

Author

Richard Fournier, Julien Yves Rolland, Guillaume Terrée, Mouna El Hafi, Stéphane Blanco, Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement (RAPSODEE), Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Groupe de Recherche Energétique, Plasmas et Hors Equilibre (LAPLACE-GREPHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire de Mathématiques de Besançon (UMR 6623) (LMB), Université de Bourgogne (UB)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Field (physics), Generalization, [PHYS.MPHY]Physics [physics]/Mathematical Physics [math-ph], General Physics and Astronomy, Heavy traffic approximation, 01 natural sciences, 010305 fluids & plasmas, [MATH.MATH-ST]Mathematics [math]/Statistics [math.ST], Bounded function, 0103 physical sciences, Statistics, Path (graph theory), Range (statistics), Limit (mathematics), Knudsen number, 010306 general physics, Mathematics
Abstract

International audience; In the field of first‐return statistics in bounded domains, short paths may be defined as those paths for which the diffusion approximation is inappropriate. However, general integral constraints have been identified that make it possible to address such short‐path statistics indirectly by application of the diffusion approximation to long paths in a simple associated first‐passage problem. This approach is exact in the zero Knudsen limit (BLANCO S. and FOURNIER R., Phys. Rev. Lett., 97 (2006) 230604). Its generalization to the low to intermediate Knudsen range is addressed here theoretically and the corresponding predictions are compared to both one‐dimension analytical solutions and three‐dimension numerical experiments. Direct quantitative relations to the solution of the Schwarzschild‐Milne problem are identified.

Published
2015

21. What It Takes to Be a Pseudomonas aeruginosa? The Core Genome of the Opportunistic Pathogen Updated

Author

Xavier Bertrand, Didier Hocquet, Kamel Mazouzi, Julien Yves Rolland, Christophe Guyeux, Benoît Valot, Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Université de Franche-Comté ( UFC ) -Centre National de la Recherche Scientifique ( CNRS ), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies ( FEMTO-ST ), Université de Technologie de Belfort-Montbeliard ( UTBM ) -Ecole Nationale Supérieure de Mécanique et des Microtechniques ( ENSMM ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Centre Hospitalier Régional Universitaire [Besançon] ( CHRU Besançon ), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mathématiques de Besançon (UMR 6623) (LMB), Université de Bourgogne (UB)-Université de Franche-Comté (UFC), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC), Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon), Laboratoire Chrono-environnement - CNRS - UFC (UMR 6249) (LCE), and Centre Hospitalier Régional Universitaire [Besançon] (CHRU Besançon)

Subjects
Genome evolution, MESH : Genome, Bacterial, lcsh:Medicine, [INFO.INFO-SE]Computer Science [cs]/Software Engineering [cs.SE], Bacterial genome size, Biology, MESH: Genome, Bacterial, Genome, [INFO.INFO-IU]Computer Science [cs]/Ubiquitous Computing, [INFO.INFO-CR]Computer Science [cs]/Cryptography and Security [cs.CR], [ SDV.MP ] Life Sciences [q-bio]/Microbiology and Parasitology, Gene density, lcsh:Science, Prophage, Genetics, Comparative genomics, Multidisciplinary, lcsh:R, Genome project, MESH : Pseudomonas aeruginosa, [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, 3. Good health, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, [INFO.INFO-MA]Computer Science [cs]/Multiagent Systems [cs.MA], Pseudomonas aeruginosa, MESH: Pseudomonas aeruginosa, lcsh:Q, [INFO.INFO-ET]Computer Science [cs]/Emerging Technologies [cs.ET], Minimal genome, [INFO.INFO-DC]Computer Science [cs]/Distributed, Parallel, and Cluster Computing [cs.DC], Genome, Bacterial, Research Article
Abstract

International audience; Pseudomonas aeruginosa is an opportunistic bacterial pathogen able to thrive in highly diverse ecological niches and to infect compromised patients. Its genome exhibits a mosaic structure composed of a core genome into which accessory genes are inserted en bloc at specific sites. The size and the content of the core genome are open for debate as their estimation depends on the set of genomes considered and the pipeline of gene detection and clustering. Here, we redefined the size and the content of the core genome of P. aeruginosa from fully re-analyzed genomes of 17 reference strains. After the optimization of gene detection and clustering parameters, the core genome was defined at 5,233 orthologs, which represented ~ 88% of the average genome. Extrapolation indicated that our panel was suitable to estimate the core genome that will remain constant even if new genomes are added. The core genome contained resistance determinants to the major antibiotic families as well as most metabolic, respiratory, and virulence genes. Although some virulence genes were accessory, they often related to conserved biological functions. Long-standing prophage elements were subjected to a genetic drift to eventually display a G+C content as higher as that of the core genome. This contrasts with the low G+C content of highly conserved ribosomal genes. The conservation of metabolic and respiratory genes could guarantee the ability of the species to thrive on a variety of carbon sources for energy in aerobiosis and anaerobiosis. Virtually all the strains, of environmental or clinical origin, have the complete toolkit to become resistant to the major antipseudomonal compounds and possess basic pathogenic mechanisms to infect humans. The knowledge of the genes shared by the majority of the P. aeruginosa isolates is a prerequisite for designing effective therapeutics to combat the wide variety of human infections.

Published
2014

22. Detection of Temporal Clusters of Healthcare-Associated Infections or Colonizations with Pseudomonas aeruginosa in Two Hospitals: Comparison of SaTScan and WHONET Software Packages

Author

Valot, Benoit, Guyeux, Christophe, Rolland, Julien Yves, Mazouzi, Kamel, Hocquet, Didier, Arnaud, Isabelle, Maugat, Sylvie, Jarlier, Vincent, Astagneau, Pascal, Lefebvre, Annick, Bertrand, Xavier, Vanhems, Philippe, Lucet, Jean-Christophe, Chavanet, Pascal, Astruc, Karine, Thouverez, Michelle, Quantin, Catherine, Aho-Glélé, Ludwig Serge, Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Université de Franche-Comté ( UFC ) -Centre National de la Recherche Scientifique ( CNRS ), Centre Hospitalier Régional Universitaire [Besançon] ( CHRU Besançon ), Service d'Hygiène, Epidémiologie et Prévention [Hôpital Edouard Herriot - HCL], Hôpital Edouard Herriot [CHU - HCL], Hospices Civils de Lyon ( HCL ) -Hospices Civils de Lyon ( HCL ), Centre International de Recherche en Infectiologie ( CIRI ), École normale supérieure - Lyon ( ENS Lyon ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ), Infection, Antimicrobiens, Modélisation, Evolution ( IAME ), Université Paris 13 ( UP13 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Université Sorbonne Paris Cité ( USPC ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Service des Maladies Infectieuses et Tropicales, Hôpital du Bocage, Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand ( CHU Dijon ) -Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand ( CHU Dijon ) -Pôle des Pathologies Lourdes, Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand ( CHU Dijon ), Service Biostatistiques et Informatique Médicale (CHU de Dijon) ( DIM ), Lipides - Nutrition - Cancer (U866) ( LNC ), Université de Bourgogne ( UB ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Ecole Nationale Supérieure de Biologie Appliquée à la Nutrition et à l'Alimentation de Dijon ( ENSBANA ), Département d'infectiologie (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Laboratoire Chrono-environnement - CNRS - UFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Centre Hospitalier Régional Universitaire [Besançon] (CHRU Besançon), Hospices Civils de Lyon (HCL)-Hospices Civils de Lyon (HCL), Laboratoire des pathogènes émergents -- Emerging Pathogens Laboratory (LPE-Fondation Mérieux), Centre International de Recherche en Infectiologie - UMR (CIRI), Institut National de la Santé et de la Recherche Médicale (INSERM)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Infection, Anti-microbiens, Modélisation, Evolution (IAME (UMR_S_1137 / U1137)), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris 13 (UP13)-Université Paris Diderot - Paris 7 (UPD7)-Université Sorbonne Paris Cité (USPC), Service Biostatistiques et Informatique Médicale (CHU de Dijon) (DIM), Bornette, gudrun, Laboratoire Chrono-environnement (UMR 6249) (LCE), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire de Mathématiques de Besançon (UMR 6623) (LMB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Ministère de l'Education Nationale, Institut de Veille Sanitaire (INVS), Assistance publique-Hôpitaux de Paris - Espace éthique (AP-HP Espace éthique), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), École des Hautes Études en Santé Publique [EHESP] (EHESP), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université Paris Diderot - Paris 7 (UPD7), Vivexia S.A.R.L. [Gemeaux], CHU Dijon, Service d'épidémiologie et d'hygiène hospitalières (CHU de Dijon), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Université de Bourgogne (UB)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Ministère de l'Éducation nationale, Centre International de Recherche en Infectiologie (CIRI), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Male, [SDE] Environmental Sciences, lcsh:Medicine, Infection control, medicine.disease_cause, Disease Outbreaks, Hospitals, University, 0302 clinical medicine, Software, [ SDV.MP ] Life Sciences [q-bio]/Microbiology and Parasitology, Cluster Analysis, Software tools, Poisson Distribution, 030212 general & internal medicine, lcsh:Science, Cross Infection, Multidisciplinary, Incidence, Incidence (epidemiology), University hospital, 3. Good health, Monte Carlo method, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Water pollution, Pseudomonas aeruginosa, [SDE]Environmental Sciences, Female, Research Article, Healthcare associated infections, medicine.medical_specialty, Permutation, 030231 tropical medicine, Microbiology, 03 medical and health sciences, Nosocomial infections, medicine, Humans, Pseudomonas Infections, Intensive care medicine, Unit level, Aged, Retrospective Studies, business.industry, lcsh:R, Bacteriology, Retrospective cohort study, [SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie, Emergency medicine, lcsh:Q, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, business
Abstract

International audience; The identification of temporal clusters of healthcare-associated colonizations or infections is a challenge in infection control. WHONET software is available to achieve these objectives using laboratory databases of hospitals but it has never been compared with SaTScan regarding its detection performance. This study provided the opportunity to evaluate the performance of WHONET software in comparison with SaTScan software as a reference to detect clusters of Pseudomonas aeruginosa. A retrospective study was conducted in two French university hospitals. Cases of P. aeruginosa colonizations or infections occurring between 1st January 2005 and 30th April 2014 in the first hospital were analyzed overall and by medical ward/care unit. Poisson temporal and space-time permutation models were used. Analyses were repeated for the second hospital on data from 1st July 2007 to 31st December 2013 to validate WHONET software (in comparison with SaTScan) in another setting. During the study period, 3,946 isolates of P. aeruginosa were recovered from 2,996 patients in the first hospital. The incidence rate was 89.8 per 100,000 patient-days (95% CI [87.0; 92.6]). Several clusters were observed overall and at the unit level and some of these were detected whatever the method used. WHONET results were consistent with the analyses that took patient-days and temporal trends into account in both hospitals. Because it is more flexible and easier to use than SaTScan, WHONET software seems to be a useful tool for the prospective surveillance of hospital data although it does not take populations at risk into account.

Published
2014

23. Monte Carlo advances and concentrated solar applications

Author

Vincent Eymet, Jérémi Dauchet, Richard Fournier, Cyril Caliot, Julien Yves Rolland, Olivier Gourmel, Christophe Coustet, Maxime Roger, Jacques Gautrais, David Joseph, J. Delatorre, F. Veynandt, P. Perez, N. Meilhac, B. Piaud, Stéphane Blanco, S. Weitz, Mathias Paulin, Jean-François Cornet, Germain Baud, Anthony Pajot, Jean-Jacques Bezian, M. El Hafi, Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement (RAPSODEE), Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Groupe de Recherche Energétique, Plasmas et Hors Equilibre (LAPLACE-GREPHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Procédés, Matériaux et Energie Solaire (PROMES), Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherches sur la Cognition Animale (CRCA), Centre de Biologie Intégrative (CBI), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut des sciences du cerveau de Toulouse. (ISCT), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Structural Models and Tools in Computer Graphics (IRIT-STORM), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), ONERA, and Technical University of Lisbon

Subjects
Reflection (computer programming), Renewable Energy, Sustainability and the Environment, Computer science, 020209 energy, Computation, Monte Carlo method, 02 engineering and technology, Variance (accounting), Sensitivity computation, 021001 nanoscience & nanotechnology, Control variates, Computer graphics, Solar energy flux density distribution, [SPI]Engineering Sciences [physics], Computer engineering, Concentrated solar energy, Convergence (routing), 0202 electrical engineering, electronic engineering, information engineering, Monte Carlo algorithm, General Materials Science, 0210 nano-technology, Solar concentrators design optimization
Abstract

International audience; The Monte Carlo method is partially reviewed with the objective of illustrating how some of the most recent methodological advances can benefit to concentrated solar research. This review puts forward the practical consequences of writing down and handling the integral formulation associated to each Monte Carlo algorithm. Starting with simple examples and up to the most complex multiple reflection, multiple scattering configurations, we try to argue that these formulations are very much accessible to the non specialist and that they allow a straightforward entry to sensitivity computations (for assistance in design optimization processes) and to convergence enhancement techniques involving subtle concepts such as control variate and zero variance. All illustration examples makePROMES - UPR CNRS 8521 - 7, rue du Four Solaire, 66120 Font Romeu Odeillo, France use of the public domain development environment EDStar (including advanced parallelized computer graphics libraries) and are meant to serve as start basis either for the upgrading of existing Monte Carlo codes, or for fast implementation of ad hoc codes when specific needs cannot be answered with standard concentrated solar codes (in particular as far as the new generation of solar receivers is concerned). (C) 2013 Elsevier Ltd. All rights reserved.

Published
2014

25. Rare neuroendocrine tumours: Results of the surveillance of rare cancers in Europe project

Author

Van Der Zwan, Jan Maarten, Trama, Annalisa, Otter, Renã©e, Larraã±aga, Nerea, Tavilla, Andrea, Marcos-gragera, Rafael, Dei Tos, Angelo Paolo, Baudin, Eric, Poston, Graeme, Links, Thera, Zielonke, N., Van Eycken, E., Sundseth, H., Hedelin, G., Faivre, JULIEN YVES STEPHAN, Woronoff, A. S., Buemi, A., Tretarre, B., Colonna, Marco, Bara, S., Ganry, O., Grosclaude, P., Holleczek, B., Geissler, J., Tryggvadottir, L., Deady, S., Bellã¹, F., Ferretti, Silvia, Serraino, D., Vercelli, M., Vitarelli, S., Cirilli, C., Fusco, M., Traina, Angelo, Michiara, M., Giacomin, A., Tumino, R., Mangone, L., Falcini, F., Senatore, G., Budroni, M., Piffer, S., Crocetti, E., LA ROSA, FEDERICA IRENE, Contiero, P., Fiore, A., Gatta, G., Casali, P. G., Gronchi, A., Ruzza, Marta, Sowe, S., De Angelis, R., Dei Tos, A. P., England, K., Ursin, G., Rachtan, J., Gozdz, S., Zwierko, M., Slowinski, J., Miranda, A., Safaei Diba, C., Primic-zakelj, M., Mateos, A., Martã­nez, R., Torrella-ramos, A., Osca-gelis, G., Chirlaque, M. D., Moreno, C., Galceran, J., Martinez-garcia, C., Melchor, J. M., Sã¡nchez, M. J., Virizuela-echaburu, J. A., Cervantes, A., Adolfsson, J., Lambe, M., Mã¶ller, T. R., Ringborg, U., Jundt, G., Bouchardy, C., Ess, S. M., Bordoni, A., Konzelmann, I., Lutz, J. M., Visser, O., Siesling, S., Coebergh, J. W. W., Greenberg, D. C., Wilkinson, Robert John Duncan, Roche, M., Verne, J., Meechan, D., Lawrence, G., Coleman, M. P., Mackay, J., Gavin, A., Brewster, D. H., Kunkler, I., White, C., Damage and Repair in Cancer Development and Cancer Treatment (DARE), Guided Treatment in Optimal Selected Cancer Patients (GUTS), and Bouchardy Magnin, Christine

Subjects
Male, Pediatrics, Pathology, Cancer Research, MEDULLARY-THYROID CARCINOMA, Survival, Rare Diseases/epidemiology/mortality, Neuroendocrine Tumors/epidemiology/mortality, PROGNOSTIC-FACTORS, MERKEL CELL-CARCINOMA, Prevalence, EPIDEMIOLOGY, Cancer registry, Incidence, Prevalence, Survival, Neuroendocrine, Registries, Child, education.field_of_study, Relative survival, Merkel cell carcinoma, Incidence (epidemiology), Incidence, Middle Aged, Cancer registry, Europe, Neuroendocrine Tumors, Neuroendocrine, Oncology, Child, Preschool, Epidemiological Monitoring, Female, Adult, medicine.medical_specialty, Adolescent, Population, UNITED-STATES, DIAGNOSIS, Europe/epidemiology, NO, PERIOD ANALYSIS, Young Adult, Rare Diseases, Carcinoma, medicine, Rare neuroendocrine tumours, Humans, education, Survival analysis, ddc:613, Aged, business.industry, Infant, Newborn, Cancer, Infant, NATURAL-HISTORY, medicine.disease, Survival Analysis, STAGING-SYSTEMS, business
Abstract

Because of the low incidence, and limited opportunities for large patient volume experiences, there are very few relevant studies of neuroendocrine tumours (NETs).A large population-based database (including cancer patients diagnosed from 1978 to 2002 and registered in 76 population-based cancer registries [CRs]), provided by the project 'surveillance of rare cancers in Europe' (RARECARE) is used to describe the basic indicators of incidence, prevalence and survival of NETs, giving a unique overview on the burden of NETs in Europe. NETs at all cancer sites, excluding lung, were analysed in this study. In total over 20,000 incident cases of NETs were analysed and a data quality check upon specific NETs was performed. The overall incidence rate for NETs was 25/1,000,000 and was highest in patients aged 65 years and older with well differentiated endocrine carcinomas (non-functioning pancreatic and gastrointestinal) (40 per 1,000,000). We estimated that slightly more than 100,000 people were diagnosed with NETs and still alive in EU27 at the beginning of 2008. Overall, NETs had a 5 year relative survival of 50%; survival was low (12%) for poorly differentiated endocrine carcinoma, and relatively high (64%) for well differentiated carcinoma (not functioning of the pancreas and digestive organs). Within NETs, endocrine carcinoma of thyroid gland had the best 5-year relative survival (82%).Because of the complexity and number of the different disciplines involved with NETs (as they arise in many organs), a multidisciplinary approach delivered in highly qualified reference centres and an international network between those centres is recommended. (c) 2013 Elsevier Ltd. All rights reserved.

Published
2013

27. High-Temperature Radiative Behavior of an La2NiO4+δ Cathodic Layer for SOFCs (up to 900°C): Influence of δ and Texture

Author

Ta, Minh Tri, Rousseau, Benoit, Del Campo, Leire, Rolland, Julien-Yves, Touchefeu, Stéphanie, Veron, Emmanuel, De Sousa Meneses, Domingos, Echegut, Patrick, Lenormand, Pascal, Ansart, Florence, Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), and Université d'Orléans (FRANCE)

Subjects
Matériaux, ZrO2–8% Y2O3, SOFC, [CHIM.MATE]Chemical Sciences/Material chemistry, La2NiO4+δ Layer
Abstract

International audience; Thermal radiation is likely to play an important role in the calculation of the energy balance in solid oxide fuel cells (SOFCs), due to their high operating temperatures (600°–1000°C). However, the majority of previous studies dealing with this issue have used room-temperature radiative data for determining the overall heat transfer process within a given cell, which could lead to an inexact appreciation of the role played by the thermal radiation. Consequently, the thermal field within the cell could also be incorrectly determined; however, accurate knowledge of the thermal field is important in order to understand the mechanical behavior of SOFCs. Several parameters, including chemical composition, texture, thickness, and of course operating temperature, have a large effect on the radiative properties of a given compound. As a first step to elucidate the temperature-dependent behavior of SOFCs, we deposited an La2NiO4+δ cathodic layer on a planar ZrO2–8% Y2O3 electrolyte-supported SOFC and investigated its radiative properties using high-temperature infrared emissivity spectroscopy (100°–900°C). Additional X-ray diffraction, thermo-gravimetric analysis, and environmental scanning electron microscopy measurements were also made to study the role played by both the chemical composition and texture on the radiative properties of the cell.

Published
2011

28. Prediction of thermal radiative properties (300–1000 K) of La2NiO4+δ ceramics

Author

Florence Ansart, Benoit Rousseau, Fabien Giovannelli, Patrick Echegut, Mustapha Zaghrioui, Minh Tri Ta, Hector Gomart, Pascal Lenormand, Julien Yves Rolland, Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Ecole Centrale Paris (FRANCE), Université d'Orléans (FRANCE), Université de Tours (FRANCE), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Electrodynamique des Matériaux Avancés (LEMA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion (EM2C), CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université Paris Saclay (COmUE), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)

Subjects
Thermogravimetric analysis, Materials science, Physics and Astronomy (miscellaneous), Matériaux, Mineralogy, Thermodynamics, Infrared spectroscopy, [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.MAT]Engineering Sciences [physics]/Materials, Thermal, Surface roughness, Radiative transfer, Texture (crystalline), Thermal analysis, Single crystal
Abstract

International audience; A multiscale numerical model is developed to predict the thermal radiative properties (TRP) of rough La2NiO4+δ coatings. The model integrates intrinsic and extrinsic contributions related to the chemical composition and the texture, respectively. High-temperature infrared reflectivity and thermogravimetric measurements on a La2NiO4+δ single crystal make it possible to understand the role of the excess oxygen in the intrinsic TRP. We show that dense ceramics with thicknesses higher than 4 μm are optically thick, and that one can adjust the surface roughness parameters to predict their TRP.

Published
2010

29. Synergy of SMOS microwave radiometer, thermal data and vegetation index for monitoring the water status of forest and natural vegetation

Author

Mattar, Cristian, Sobrino, Jose A., Wigneron, Jean-Pierre, Kerr, Yann H., Ahmad, Al Bitar, Novello, Nathalie, Julien, Yves, Jimenez-Munoz, Juan-Carlos, Soria, Guillem, Hidalgo, Victoria, Franch, Belen, Oltra-Carrio, R., Cuenca, Juan, Universitat de València (UV), Écologie fonctionnelle et physique de l'environnement (EPHYSE), Institut National de la Recherche Agronomique (INRA), Centre d'études spatiales de la biosphère (CESBIO), 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)-Observatoire Midi-Pyrénées (OMP), 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 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)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Global Change Unit, University of Valencia, Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-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)-Observatoire Midi-Pyrénées (OMP), and 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)

Subjects
analyse de données, MODIS, télédétection, [SDV]Life Sciences [q-bio], MISSION SMOS, [SDE]Environmental Sciences, humidité du sol, LAND SURFACE TEMPERATURE, MSG2-SEVIRI, SYNERGY, radiométrie, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2010

34. Modelling of the Thermal Radiative Properties of Oxide Ceramics

Author

Domingos De Sousa Meneses, Leire del Campo, Benoit Rousseau, Patrick Echegut, and Julien Yves Rolland

Subjects
Materials science, business.industry, Physics::Medical Physics, Physics::Optics, Computational physics, Optics, visual_art, Transmittance, Radiative transfer, visual_art.visual_art_medium, Thermal emittance, Texture (crystalline), Ceramic, Porosity, business, Spectroscopy, Distributed ray tracing
Abstract

A numerical model based upon a Monte Carlo Ray Tracing (MCRT) code was developed to predict the thermal radiative properties (reflectance, transmittance, emittance) of a family of virtual alumina ceramics with prescribed textural features. The numerical samples were constituted of polydisperse spherical pores [20–120 μm] embedded in a continuous and homogenous alumina matrix. The texture of the alumina ceramics were numerically settled, allowing, in our case, to fix their porosity, their volumetric surface and their radii size distribution. The MCRT code was applied at T = 300 K and T = 1300 K since, at the local scale, the complex indices of refraction of the alumina matrix were known. The comparisons of the emittance spectra of the numerical samples with the ones acquired by infrared emittance spectroscopy on a single crystal of alumina (T = 300 K and T = 1300 K) allow to discuss the effects played by the temperature and by each textural parameters.Copyright © 2010 by ASME

Published
2010

37. Etude statistique des chemins de premier retour aux nombres de Knudsen intermédiaires : De la simulation par méthode de Monte Carlo à l'utilisation de l'approximation de diffusion

Author

Julien Yves Rolland, Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), and Institut National Polytechnique de Toulouse - INPT (FRANCE)

Subjects
Épaisseur optique de diffusion, Diffusion multiple, Premier retour, Premier passage, Nombre de Knudsen
Abstract

En présence de diffusions multiples, les algorithmes de Monte-Carlo sont trop coûteux pour être employés dans les algorithmes de reconstruction d'images de géométries tridimensionnelles réalistes. Pour des trajectoires de premiers retours, l'approximation de diffusion est communément employée afin de représenter la statistique des chemins aux nombres de Knudsen tendant vers zéro. En formulant des problèmes équivalents sur des trajectoires de premiers passages, l'usage de l'approximation est étendue en un développement théorique. Cette nouvelle formulation assure un bon niveau de précision, sur une large plage de valeurs du nombre de Knudsen en ce qui concerne l'évaluation des moments de la distribution des longueurs des chemins de premier retour. La résolution numérique du modèle formulé est confrontée aux simulations numériques type Monte- Carlo sur des géométries mono-dimensionnelles et un cas tridimensionel ouvrant des perspectives vers une généralisation aux applications réelles.

Published
2009

38. Photon path statistics in turbid media

Author

Julien Yves Rolland, Stéphane Blanco, Mouna El HAFI, Fournier, Richard A., Laboratoire de Mathématiques de Besançon (UMR 6623) (LMB), Université de Bourgogne (UB)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Groupe de Recherche Energétique, Plasmas et Hors Equilibre (LAPLACE-GREPHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement (RAPSODEE), Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), and Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)

Subjects
[SPI]Engineering Sciences [physics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2009

39. Monte Carlo estimations of domain-deformation sensitivities for optimal geometric design

Author

Jérémie La Torre, Julien Yves Rolland, Maxime Roger, Mouna El HAFI, Fournier, Richard A., Stéphane Blanco, Jean-Jacques Bézian, Laboratoire de Mathématiques de Besançon (UMR 6623) (LMB), Université de Bourgogne (UB)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Centre d'Energétique et de Thermique de Lyon (CETHIL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement (RAPSODEE), Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Groupe de Recherche Energétique, Plasmas et Hors Equilibre (LAPLACE-GREPHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, and IMT Mines Albi, IMT Mines Albi

Subjects
[SPI]Engineering Sciences [physics], [SPI] Engineering Sciences [physics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2009

40. Vegetation monitoring through retrieval of NDVI and LST time series from historical databases

Author

Julien, Yves, Nerry, Françoise, Sobrino Rodríguez, José Antonio, Universitat de València - TERMODINÀMICA, and Universitat de València. Departament de Termodinàmica

Subjects
none, Facultat de Físiques
Abstract

The PhD dissertation presented here falls into the Earth Observation field, specifically vegetation monitoring. This work consists in the extensive exploitation of historical databases of satellite images for vegetation monitoring through two parameters, which are the land surface temperature (LST) and a vegetation index (NDVI). Up to now, vegetation monitoring has been limited to the use of vegetation indices, so the addition of the land surface temperature parameter represents the main innovative character of this PhD study.This dissertation is divided into 5 chapters. The first chapter begins by introducing the theoretical aspects of NDVI and LST parameters, addressing the means for retrieving them from remotely sensed observations, as well as their main limitations. Then, an introduction to vegetal physiology is developed, which allows for understanding how NDVI and LST parameters are linked to plants. A bibliographical study is then presented, which stresses out the gaps in the exploitation of historical databases.The second describes the data used in this PhD. The instrument providing most of these data is embarked on the NOAA (National Oceanic and Atmospheric Administration) satellite series. This instrument is the AVHRR (Advanced Very High Resolution Radiometer). The AVHRR databases used in this work are the PAL (Pathfinder AVHRR Land) and GIMMS (Global Inventory Modeling and Mapping Studies) databases. Additional data used punctually are also described briefly.The third chapter describes the operations applied to the data to prepare their temporal analysis. These operations start with the calculations of vegetation index and land surface temperature parameters. The AVHRR data used in this work are contaminated by the orbital drift of NOAA satellites, so an important part of this doctorate consisted in developing a technique for correcting this effect. We chose to develop our own technique, which we validated by direct comparison with data retrieved by geostationary satellites.In the fourth chapter, the different methods used for data temporal analysis are presented. Those methods consist of trend detection, harmonic analysis, and fitting the temporal series to annual NDVI evolution curves. Then, a phenological analysis is presented, which allows for retrieval of trends in spring and autumn dates for most of the globe. These trends are validated by comparison with previous studies. The trend analysis for spring dates is then extended to the 1948-2006 period using air temperature data. The long-term observation of different NDVI indicators also allows for the detection of land vegetation changes, even in our case of coarse spatial resolution. Finally, two methods for NDVI temporal analysis are compared.In the fifth chapter, a quick presentation of simultaneous study of NDVI and LST is developed through a revision of previous results, followed by the observations carried out from the orbital drift corrected data. These observations allowed for the determination of indicators of NDVI and LST, thus enabling for the characterization of the vegetation at global scale. A harmonic analysis of NDVI and LST at European scale is also presented. The application of the developed indicators for simultaneous monitoring of NDVI and LST shows promising results.As a conclusion, the main results described above are summarized, and plans for a close future are presented. This PhD has also demonstrated that such work could be carried out in a small structure with limited resources., El trabajo de tesis doctoral aquí presentado consiste en el uso extensivo de bases de datos históricas de imágenes de satélite para el seguimiento de la vegetación terrestre, a través de dos parámetros; la temperatura de la superficie terrestre (LST por sus siglas en inglés) y el índice de vegetación NDVI.El primer capítulo de la memoria introduce las nociones de NDVI y LST desde una perspectiva teórica, así como sus principales limitaciones y sus vínculos con la fisiología vegetal. Un estudio bibliográfico permite poner el acento sobre las lagunas en el uso de las bases de datos históricas.El segundo capítulo describe los datos utilizados en este trabajo, proporcionados en su mayoría por el instrumento AVHRR (Advanced Very High Resolution Radiometer) a bordo de la serie de satélites de la NOAA (National Oceanic and Atmospheric Administration) a través de las bases de datos PAL (Pathfinder AVHRR Land) y GIMMS (Global Inventory Modeling and Mapping Studies). También se presentan datos adicionales que se usaron puntualmente. El tercer capítulo describe el proceso para obtener las series temporales de NDVI y LST, las cuales están contaminadas por la deriva orbital de los satélites NOAA. Hemos propuesto una técnica propia para su corrección, validada por comparación directa con datos obtenidos por satélites geoestacionarios.En el cuarto capítulo se introducen diferentes métodos utilizados para el análisis temporal de los datos. Se obtuvieron tendencias acerca de parámetros vinculados a la evolución anual de NDVI para la mayor parte del globo, validadas por comparación con estudios previos.En el quinto capítulo se presenta un análisis conjunto del NDVI y de la LST, seguido por la elaboración de indicadores de la evolución anual de estos dos parámetros. A continuación se presenta un análisis armónico del NDVI y de la LST para Europa. El uso de los indicadores desarrollados para el seguimiento simultáneo del NDVI y de la LST revela resultados prometedores.Por último se presentan las conclusiones más relevantes del trabajo realizado, así como planes de trabajo para un futuro próximo.

Published
2008

41. Méthode de Monte Carlo et synthèse d'images : application à des milieux diffusants en transfert radiatif

Author

Julien-Yves Rolland, Mouna El HAFI, Fournier, Richard A., Stéphane Blanco, Mathias Paulin, Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement (RAPSODEE), Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Groupe de Recherche Energétique, Plasmas et Hors Equilibre (LAPLACE-GREPHE), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Visual Objects from Reality To Expression (IRIT-VORTEX), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), and Jean-Jacques BEZIAN

Subjects
[PHYS.MECA.THER]Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph], [SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph]
Abstract

International audience; L'objectif principal de cette étude est la prise en compte de la diffusion multiple pour le calcul de transferts radiatifs dans des géométries complexes. Pour traiter la diffusion, un algorithme basé sur la méthode de Monte Carlo a été développé et implémenté dans un environnement issu d'un code de synthèse d'images existant. A l'aide de propriétés d'invariance de la statistique des chemins de diffusion multiple, nous avons validé cette approche dans le cas de trois géométries tridimensionnelles usuelles : sphère, cylindre et pyramide.

Published
2007

44. Evaluation of the surface urban heat island effect in the city of Madrid by thermal remote sensing

Author

Sobrino, José A., primary, Oltra-Carrió, Rosa, additional, Sòria, Guillem, additional, Jiménez-Muñoz, Juan Carlos, additional, Franch, Belén, additional, Hidalgo, Victoria, additional, Mattar, Cristian, additional, Julien, Yves, additional, Cuenca, Juan, additional, Romaguera, Mireia, additional, Gómez, J. Antonio, additional, De Miguel, Eduardo, additional, Bianchi, Remo, additional, and Paganini, Marc, additional

Published
2012
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48. Temporal analysis of normalized difference vegetation index (NDVI) and land surface temperature (LST) parameters to detect changes in the Iberian land cover between 1981 and 2001

Author

Julien, Yves, primary, Sobrino, Jose A., additional, Mattar, Cristian, additional, Ruescas, Ana B., additional, Jiménez-Muñoz, Juan C., additional, Sòria, Guillem, additional, Hidalgo, Victoria, additional, Atitar, Mariam, additional, Franch, Belen, additional, and Cuenca, Juan, additional

Published
2011
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49. Numerical prediction of the radiative behavior of metallic foams from the microscopic to macroscopic scale

Author

Patrick Echegut, Jérôme Vicente, Emmanuel Brun, Julien Yves Rolland, and Benoit Rousseau

Subjects
History, Materials science, Scattering, business.industry, Metal foam, Computer Science Applications, Education, Computational physics, Micrometre, Optics, Thermal radiation, Macroscopic scale, Transmittance, Reflection (physics), Radiative transfer, business
Abstract

A parallel C++ numerical code was implemented to quickly and accurately calculate the radiative properties (reflectance and transmittance) of metallic foams that had scattering domains (pores, struts) with mean sizes larger than the wavelengths associated with thermal radiation. For application, the code required experimental knowledge of the material characteristics on several length scales ranging from the microscopic (approximately one micrometer) to macroscopic (approximately one centimeter). In particular, the 3D voxelized image of the investigated material was used, which was previously acquired using x-ray μ-tomography. The radiative properties were obtained by tracking a large number of rays within the numerical medium. On the local scale, rays interacted directly with the fluid/solid interface, which was obtained prior to the calculation by the application of a robust marching cubes algorithm to the entire set of voxels. The code was applied to aluminum foam samples, for which the experimental radiative properties were previously measured at room temperature with a customized instrument based on an infrared spectrometer. The code performance is discussed and the results enabled determination of the effects caused by the fluid/solid interface on the interfacial reflection.

Published
2012

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