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48 results on '"Instituto Politecnico Nacional [Mexico] (IPN)"'

1. Mercury isotope clocks predict coastal residency and migration timing of hammerhead sharks

Author

Lucien Besnard, Brandyn M. Lucca, Oliver N. Shipley, Gaël Le Croizier, Raúl O. Martínez‐Rincón, Jeroen E. Sonke, David Point, Felipe Galván‐Magaña, Edouard Kraffe, Sae Yun Kwon, Gauthier Schaal, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Stony Brook University [SUNY] (SBU), State University of New York (SUNY), The University of New Mexico [Albuquerque], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Centro de Investigaciones Biologicas del Noroeste [Mexico] (CONACYT-CIBNOR), Consejo Nacional de Ciencia y Tecnología [Mexico] (CONACYT), Géosciences Environnement Toulouse (GET), 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 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), Instituto Politecnico Nacional [Mexico] (IPN), Université de Brest (UBO), Pohang University of Science and Technology (POSTECH), and ANR-17-CE34-0010,MERTOX,Découvrir l'origine de la toxine methylmercure dans les écosystèmes marins(2017)

Subjects
trophic ecology, ontogeny, Ecology, dispersal timing, connectivity, fishery interaction, conservation, movement ecology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, habitat shift
Abstract

International audience; The management of migratory taxa relies on the knowledge of their movements. Among them, ontogenetic habitat shift, from nurseries to adult habitats, is a behavioural trait shared across marine taxa allowing resource partitioning between life stages and reducing predation risk. As this movement is consistent over time, characterizing its timing is critical to implement efficient management plans, notably in coastal areas to mitigate the impact of fisheries on juvenile stocks.In the Mexican Pacific, habitat use of the smooth hammerhead shark (Sphyrna zygaena) is poorly described, while the species is heavily harvested. Given the large uncertainties associated with the timing of out-migration from coastal nursery grounds to offshore waters prior to reproductive maturity, a more precise assessment of smooth hammerhead shark movements is needed.Photochemical degradation of mercury imparts mass-independent isotope fractionation (?Hg-199) which can be used to discriminate between neonate coastal shallow habitats and the offshore deep foraging patterns of late juveniles. Here, we present the application of muscle ?Hg-199 as molecular clocks to predict the timing of ontogenetic habitat shifts by smooth hammerhead sharks, based on their isotopic compositions at the initial and arrival habitats and on muscle isotopic turnover rate.We observed decreases in ?Hg-199 values with shark body length, reflecting increasing reliance on offshore mesopelagic prey with age. Coastal residency estimates indicated that smooth hammerhead sharks utilize coastal resources for 2 years prior to offshore migration, suggesting a prolonged residency in these ecosystems.Policy implications. This study demonstrates how mercury stable isotopes and isotopic clocks can be implemented as a complementary tool for stock management by predicting the timing of animal migration-a key aspect in the conservation of marine taxa. In the Mexican Pacific, fishing pressure on shark species occurs in coastal habitats depleting juvenile stocks. Consequently, management decision support tools are imperative for effectively maintaining early life stage population levels over time. The finding that smooth hammerhead sharks extensively rely on highly fished habitats for 2 years after parturition supports the relevance of establishing a size limit in coastal fisheries and demonstrates how the current temporal shark fishing closure could lack efficiency for the species.

Published
2023

2. A Robust Nonlinear Model Reference Adaptive Control for Disturbed Linear Systems: An LMI Approach

Author

Roberto Franco, Alejandra Ferreira de Loza, Denis Efimov, Hector Rios, Tecnológico Nacional de México (TecNM), Instituto Politecnico Nacional [Mexico] (IPN), Consejo Nacional de Ciencia y Tecnología [Mexico] (CONACYT), Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), National Research University of Information Technologies, Mechanics and Optics [St. Petersburg] (ITMO), Roberto Franco, Héctor Ríos and Alejandra Ferreira de Loza thank the financial support from CONACYT CVU 772057, Cátedras CONACYT CVU 270504 project 922, and Cátedras CONACYT CVU 166403 project 1537, respectively, and and from TecNM projects.

Subjects
0209 industrial biotechnology, Adaptive control, Computer science, Linear system, MathematicsofComputing_NUMERICALANALYSIS, 02 engineering and technology, Nonlinear control, Model Reference Adaptive Control, [SPI.AUTO]Engineering Sciences [physics]/Automatic, Computer Science Applications, Tracking error, Nonlinear system, 020901 industrial engineering & automation, Rate of convergence, Control and Systems Engineering, Control theory, Uncertain Linear Systems, Electrical and Electronic Engineering, Robust control, Robust Control, Nonlinear Control
Abstract

International audience; In this paper a robust nonlinear Model Reference Adaptive Control (MRAC) is proposed for disturbed linear systems, i.e., linear systems with parameter uncertainties, and external time-dependent perturbations or nonlinear unmodeled dynamics matched with the control input. The proposed nonlinear control law is composed of two nonlinear adaptive gains. Such adaptive gains allow the control to counteract the effects of some perturbations and nonlinear unmodeled dynamics ensuring asymptotic convergence of the tracking error to zero, and the boundedness of the adaptive gains. The nonlinear controller synthesis is given by a constructive method based on the solution of Linear Matrix Inequalities (LMIs). Besides, the simulation results show that, due to the nonlinearities, the rate of convergence of the proposed algorithm is faster than the provided by a classic MRAC.

Published
2022

3. The Twilight Zone as a Major Foraging Habitat and Mercury Source for the Great White Shark

Author

Jeroen E. Sonke, James T. Ketchum, Gador Muntaner-López, Barbara A. Block, Marc Aquino-Baleytó, Lucien Besnard, Gauthier Schaal, Gaël Le Croizier, David Point, Felipe Galván-Magaña, Omar Santana-Morales, Salvador J. Jorgensen, Armelle Jung, Edgar E. Becerril-García, Anne Lorrain, Aaron B. Carlisle, E. Mauricio Hoyos-Padilla, Géosciences Environnement Toulouse (GET), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-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), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Pelagios Kakunjá, Instituto Politecnico Nacional [Mexico] (IPN), Hopkins Marine Station [Stanford], Stanford University, School of Marine Science and Policy, College of Earth, Ocean, and Environment [Newark] (CEOE), University of Delaware [Newark]-University of Delaware [Newark], Institute of Marine Sciences, University of California [Santa Cruz] (UCSC), University of California-University of California, Interdisciplinary Graduate School for the Blue planet, ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017), ANR-17-CE34-0010,MERTOX,Découvrir l'origine de la toxine methylmercure dans les écosystèmes marins(2017), 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 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), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), University of California [Santa Cruz] (UC Santa Cruz), and University of California (UC)-University of California (UC)

Subjects
food.ingredient, Mesopelagic zone, 010501 environmental sciences, 01 natural sciences, Predation, food, biology.animal, Animals, Environmental Chemistry, 14. Life underwater, Ecosystem, 0105 earth and related environmental sciences, Apex predator, Trophic level, Pacific Ocean, biology, Ecology, Mercury, General Chemistry, biology.organism_classification, Carcharias, Carcharodon, Mercury Isotopes, Great white shark, Habitat, 13. Climate action, [SDE]Environmental Sciences, Sharks
Abstract

International audience; The twilight zone contains the largest biomass of the world's ocean. Identifying its role in the trophic supply and contaminant exposure of marine megafauna constitutes a critical challenge in the context of global change. The white shark (Carcharodon carcharias) is a threatened species with some of the highest concentrations of neurotoxin methylmercury (MeHg) among marine top predators. Large white sharks migrate seasonally from coastal habitats, where they primarily forage on pinnipeds, to oceanic offshore habitats. Tagging studies suggest that while offshore, white sharks may forage at depth on mesopelagic species, yet no biochemical evidence exists. Here, we used mercury isotopic composition to assess the dietary origin of MeHg contamination in white sharks from the Northeast Pacific Ocean. We estimated that a minimum of 72% of the MeHg accumulated by white sharks originates from the consumption of mesopelagic prey, while a maximum of 25% derives from pinnipeds. In addition to highlighting the potential of mercury isotopes to decipher the complex ecological cycle of marine predators, our study provides evidence that the twilight zone constitutes a crucial foraging habitat for these large predators, which had been suspected for over a decade. Climate change is predicted to expand the production of mesopelagic MeHg and modify the mesopelagic biomass globally. Considering the pivotal role of the twilight zone is therefore essential to better predict both MeHg exposure and trophic supply to white sharks, and effectively protect these key vulnerable predators.

Published
2020

4. Two distinctive Rhizobium genospecies nodulating Vicia villosa Roth in alkaline soils of Northwest China

Author

En Tao Wang, Shanshan Peng, Chunzeng Liu, Chen Guo, Junjie Zhang, Wenfeng Chen, Brigitte Brunel, Hou Pei, Shuo Li, Benyin Li, Yimin Shang, Zhengzhou University of Light Industry, Collaborative Innovation Center for Food Production and Safety of Henan Province, Partenaires INRAE, Henan Academy of Agricultural Sciences, Instituto Politecnico Nacional [Mexico] (IPN), State Key Laboratory of Agrobiotechnology, Research and Innovation Center of Chunlun Group, Laboratoire des symbioses tropicales et méditerranéennes (UMR LSTM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), National Natural Science Foundation of China (NSFC) (31970006, 31400008), and Foundation of China Agriculture Research System - Green Manure CARS-22

Subjects
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences, 0106 biological sciences, Genospecies, Soil Science, Plant Science, Northwest China, 01 natural sciences, Genetic diversity, Rhizobia, Soil pH, Rhizobium sophorae, Botany, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Symbiosis, 2. Zero hunger, biology, Phylogenetic tree, Villosa, food and beverages, 04 agricultural and veterinary sciences, Vicia villosa Roth, 15. Life on land, biology.organism_classification, 16S ribosomal RNA, Vicia villosa, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Rhizobium, 010606 plant biology & botany
Abstract

International audience; Aims To estimate the relative abundance, diversity and distribution of rhizobia associated with Vicia villosa Roth in soils of Northwest China. Method Rhizobia were trapped with V. villosa Roth plants from soils at seven sites and identified into genotypes by PCR-RFLP of IGS genes. They were further characterized by phylogenetic analyses of 16S rRNA, housekeeping genes (atpD, recA, glnII) and symbiotic genes (nodC). Soil physicochemical characteristics were recorded and Canonical Correlation Analysis was performed to correlate soil features and the distribution of IGS genotypes. Results 253 rhizobial strains were obtained from soils with pH 7.1-7.9. They were discriminated into 27 IGS types and further affiliated by phylogenetic analyses of 16S rRNA and multilocus sequence analysis (MLSA) into two clusters in Rhizobium. One corresponds to Rhizobium sophorae covering 228 strains in 25 IGS types and the other includes a novel genospecies containing two IGS types only detected in Shanxi Province, with higher soil pH and intermediate available phosphate and potassium contents. Representative strains of the novel genospecies show a specific phylogenetic nodC lineage, which may reflect differences in symbiosis properties. Furthermore, the Shanxi site was the less IGS diversified, based on Shannon diversity indices varying from 0.96 to 2.19 along the sampled area. Conclusions As the first study on diversity of rhizobia nodulating V. villosa Roth in China, R. sophorae and a novel Rhizobium genospecies with specific symbiotic genes were identified; and biogeographic patterns were found, mainly directed by soil pH, organic matter and soil salinity, including available phosphorus salts.

Published
2020

5. Adaptive Discontinuous Control for Homogeneous Systems Approximated by Neural Networks

Author

Andrey Polyakov, Mariana Ballesteros, Alexander S. Poznyak, Isaac Chairez, Denis Efimov, Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Instituto Politechnico National (IPN), and Instituto Politecnico Nacional [Mexico] (IPN)

Subjects
Lyapunov stability, 0209 industrial biotechnology, Adaptive control, Neural Networks, Computer simulation, Artificial neural network, Computer science, Homogeneity (statistics), Computer Science::Neural and Evolutionary Computation, 020208 electrical & electronic engineering, System Identification, System identification, Homogeneous function, 02 engineering and technology, Discontinuous Control, Adaptive Control, Nonlinear system, symbols.namesake, 020901 industrial engineering & automation, Homogeneous systems, Control and Systems Engineering, Control theory, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, 0202 electrical engineering, electronic engineering, information engineering, symbols
Abstract

International audience; This study is devoted to the design of an adaptive discontinuous control based on differential neural networks (DNNs) for a class of uncertain homogeneous systems. The control is based on the universal approximation properties of artificial neural networks (ANNs) applied on a certain class of homogeneous nonlinear functions. The adaptation laws for the DNNs parameters are obtained with the application of the Lyapunov stability theory and the homogeneity properties of the approximated nonlinear system. The stability analysis of the closed loop system with the proposed controller is presented. The estimation error in the approximation of the uncertain homogeneous functions is considered in the stability analysis. The performance of the controller is illustrated by means of a numerical simulation of a homogeneous model.

Published
2020

6. Rhizobium sophorae, Rhizobium laguerreae, and two novel Rhizobium genospecies associated with Vicia sativa L. in Northwest China

Author

Shanshan Peng, Philippe de Lajudie, Benyin Li, Chunzeng Liu, Chen Guo, Yimin Shang, Junjie Zhang, En Tao Wang, Wenfeng Chen, Zhengzhou University of Light Industry, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Partenaires INRAE, Collaborative Innovation Center for Food Production and Safety of Henan Province, State Key Laboratory, China Agricultural University (CAU), Instituto Politecnico Nacional [Mexico] (IPN), Laboratoire des symbioses tropicales et méditerranéennes (UMR LSTM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université Montpellier 1 (UM1)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Henan Academy of Agricultural Sciences, China Agriculture Research System - Green Manure [CARS-22], National Natural Science Foundation of China [31400008], National Human and Social Security Ministry of Science and Technology for Overseas Returnees [21104000005], and Instituto Politecnico Nacional, Mexico [SIP20171259]

Subjects
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences, 0106 biological sciences, Vicia sativa, Soil Science, Plant Science, Biology, Northwest China, 01 natural sciences, Rhizobia, Phylogenetics, Rhizobium sophorae, Botany, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Rhizobium laguerreae, Rhizobium spp. nov, Phylogenetic tree, food and beverages, 04 agricultural and veterinary sciences, 15. Life on land, Ribosomal RNA, 16S ribosomal RNA, biology.organism_classification, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Rhizobium, Restriction fragment length polymorphism, 010606 plant biology & botany
Abstract

International audience; Aims To identify the rhizobia nodulating Vicia sativa in Northwestern China and to estimate their geographic distribution. Methods Rhizobia trapped with V. sativa plants from soils at six sites in the northwest of China were classified into genotypes by PCR-based restriction fragment length polymorphism (RFLP) of 16S-23S rRNA intergenic spacer (IGS) and 16S rRNA genes, and phylogenetic analyses of housekeeping (16S rRNA, recA, atpD) and symbiotic genes were performed for the representative strains. Soil physicochemical characteristics were recorded and canonical correlation analysis was performed to examine the correlations between soil features and distribution of rhizobial genotypes. Results A total of 202 rhizobial isolates were discriminated by RFLP analyses into 15 IGS types and a single 16S rRNA type, which were identified as Rhizobium by 16S rRNA gene phylogeny and as four clusters by multilocus sequence analysis (MLSA). Cluster 1 covering 86 strains and 7 IGS types prevalent in all sites was identified as Rhizobium laguerreae; cluster 2 was R. sophorae with 18 strains in 2 IGS types found in the site Q-GD. Each of cluster 3 and cluster 4 contained three IGS types representing two novel Rhizobium genospecies specific to Gansu Province and Shanxi Province, respectively. Four nodC phylogenetic clades were defined among the isolates. Conclusions R. sophorae, R. laguerreae, and two novel Rhizobium genospecies with diverse symbiotic genotypes are associated with Vicia sativa L. in Northwest China. Their biogeographic patterns are mainly directed by soil pH and salinity. This is the first study on the diversity of rhizobia nodulating Vicia sativa in China.

Published
2019

7. Light emission and structure of Nd-doped Si-rich-HfO2 films prepared by magnetron sputtering in different atmospheres

Author

Vega Macotela, Leonardo Gabriel, Macotela, Vega, Torchynska, Tetyana, Khomenkova, Larysa, Gourbilleau, Fabrice, Instituto Politecnico Nacional [Mexico] (IPN), V.E. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine (NASU), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Photoluminescence, Infrared, Annealing (metallurgy), Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, [PHYS.PHYS.PHYS-COMP-PH]Physics [physics]/Physics [physics]/Computational Physics [physics.comp-ph], General Materials Science, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Spectroscopy, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Argon, Doping, [CHIM.MATE]Chemical Sciences/Material chemistry, Sputter deposition, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, chemistry, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Light emission, 0210 nano-technology
Abstract

International audience; Radio-frequency magnetron sputtering was used to produce HfO 2 films doped with Nd, Si and N. The deposition was carried out in two different atmospheres: i) in pure argon plasma to grow Si-HfO 2 :Nd films, and ii) in argon-nitrogen mixed plasma to produce SiN -HfO 2 :Nd films. The effect of annealing temperature on optical and structural properties of the films was investigated. Annealing was performed at T A = 800-1100 °C for t A = 15 min in nitrogen atmosphere. The evolution of film's properties was studied by means of the scanning electronic microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and photo-luminescence (PL) methods. It was observed that the film morphology depends significantly on the deposition atmosphere. For the Si-HfO 2 :Nd films, the presence of the grains with the mean size about 100 nm was detected by the SEM method. The tetragonal HfO 2 and SiO 2 phases have been detected by the XRD method after film annealing at 950 °C. PL spectra of these films are complex and demonstrate several PL bands in the visible (400-750 nm) and infrared (800-1430 nm) spectral ranges. Their contribution depends on the annealing temperature and governs the shape of total PL spectrum. In contrary, the SiN -HfO 2 :Nd films showed unstructured smooth surface as well as featureless PL spectra. Whatever the annealing temperature, they demonstrate broad unstructured PL band with the peak within 440-480 nm. Peculiarities of PL spectra of both types of the films and the mechanism of phase separation are analyzed and discussed.

Published
2019

8. LACLICHEV: Exploring the History of Climate Change in Latin America within Newspapers Digital Collections

Author

Genoveva Vargas-Solar, Javier A. Espinosa-Oviedo, Luis M. Vilches-Blázquez, José-Luis Zechinelli-Martini, Base de Données (BD), Laboratoire d'InfoRmatique en Image et Systèmes d'information (LIRIS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École Centrale de Lyon (ECL), Université de Lyon-Université Lumière - Lyon 2 (UL2)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Université Lumière - Lyon 2 (UL2), Universidad de las Américas [Puebla] (UDLAP), Université Lumière - Lyon 2 (UL2), Instituto Politechnico National (IPN), and Instituto Politecnico Nacional [Mexico] (IPN)

Subjects
FOS: Computer and information sciences, Latin Americans, [INFO.INFO-DB]Computer Science [cs]/Databases [cs.DB], Data curation, Computer science, 05 social sciences, Climate change, Computer Science - Digital Libraries, Databases (cs.DB), 02 engineering and technology, Data science, Visualization, Newspaper, Computer Science - Databases, 13. Climate action, 020204 information systems, 0202 electrical engineering, electronic engineering, information engineering, Data analysis, Digital Libraries (cs.DL), 0509 other social sciences, 050904 information & library sciences, Digital collections
Abstract

International audience; This paper introduces LACLICHEV (Latin American Climate Change Evolution platform ), a data collections exploration environment for exploring historical newspapers searching for articles reporting meteorological events. LACLICHEV is based on data collections' exploration techniques combined with information retrieval, data analytics, and geographic querying and visualization. This environment provides tools for curating, exploring and analyzing historical newspapers articles, their description and location, and the vocabularies used for referring to meteorological events. The objective being to understand the content of newspapers and identifying possible patterns and models that can build a view of the history of climate change in the Latin American region.

Published
2021
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9. Genomic landscape of the global oak phylogeny

Author

Guido W. Grimm, M. Socorro González-Elizondo, Ernst Detlef Schulze, Michael Avishai, Sorel Fitz-Gibbon, Antonio González-Rodríguez, Victoria L. Sork, Xiao-Long Jiang, Andrew L. Hipp, John D. McVay, Andrew A. Crowl, Antoine Kremer, Thomas Denk, Oliver Gailing, Marlene Hahn, Hernando Rodríguez-Correa, Christophe Plomion, Isabelle Lesur, Paul S. Manos, Susana Valencia-Ávalos, Jeannine Cavender-Bares, Marco Cosimo Simeone, Catherine Bodénès, Min Deng, The Morton Arboretum, Duke University [Durham], The Hebrew University of Jerusalem (HUJ), Biodiversité, Gènes & Communautés (BioGeCo), Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), University of Minnesota [Morris], University of Minnesota System, Chinese Academy of Sciences [Beijing] (CAS), Swedish Museum of Natural History (NRM), University of California [Berkeley], University of California, Georg-August-University [Göttingen], Instituto Politecnico Nacional [Mexico] (IPN), Universidad Nacional Autónoma de México (UNAM), Max Planck Institute for Biogeochemistry (MPI-BGC), Max-Planck-Gesellschaft, and Università degli studi della Tuscia [Viterbo]

Subjects
0106 biological sciences, 0301 basic medicine, Gene Flow, genomic mosaicism, Physiology, Lineage (evolution), oaks, Population, education, introgression, Introgression, Plant Science, Biology, restriction-site associated DNA sequencing (RAD-seq), 010603 evolutionary biology, 01 natural sciences, Gene flow, 03 medical and health sciences, Quercus, Phylogenetics, tree diversity, Phylogenomics, Clade, Phylogeny, 030304 developmental biology, 0303 health sciences, education.field_of_study, Phylogenetic tree, diversification rates, phylogenomics, Genomics, Sequence Analysis, DNA, 15. Life on land, biology.organism_classification, Fagaceae, 030104 developmental biology, Evolutionary biology, [SDE]Environmental Sciences, 010606 plant biology & botany
Abstract

SummaryThe tree of life is highly reticulate, with the history of population divergence buried amongst phylogenies deriving from introgression and lineage sorting. In this study, we test the hypothesis that there are regions of the oak (Quercus, Fagaceae) genome that are broadly informative about phylogeny and investigate global patterns of oak diversity.We utilize fossil data and restriction-site associated DNA sequencing (RAD-seq) for 632 individuals representing ca. 250 oak species to infer a time-calibrated phylogeny of the world’s oaks. We use reversible-jump MCMC to reconstruct shifts in lineage diversification rates, accounting for among-clade sampling biases. We then map the > 20,000 RAD-seq loci back to a recently published oak genome and investigate genomic distribution of introgression and phylogenetic support across the phylogeny.Oak lineages have diversified among geographic regions, followed by ecological divergence within regions, in the Americas and Eurasia. Roughly 60% of oak diversity traces back to four clades that experienced increases in net diversification due to climatic transitions or ecological opportunity.The support we find for the phylogeny contrasts with high genomic heterogeneity in phylogenetic signal and introgression. Oaks are phylogenomic mosaics, and their diversity may in fact depend on the gene flow that shapes the oak genome.

Published
2020

10. Mesorhizobium jarvisii is a dominant and widespread species symbiotically efficient on Astragalus sinicus L. in the Southwest of China

Author

Junjie Zhang, Shanshan Peng, Yimin Shang, Wenfeng Chen, Shuo Li, Brigitte Brunel, Chunzeng Liu, Chen Guo, En Tao Wang, Zhengzhou University of Light Industry, Henan Academy of Agricultural Sciences, Laboratoire des symbioses tropicales et méditerranéennes (UMR LSTM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Instituto Politecnico Nacional [Mexico] (IPN), Research and Innovation Center of Chunlun Group, State Key Laboratory of Agrobiotechnology, China Agricultural University Library, National Natural Science Foundation of China (NSFC) (31970006), and Instituto Politecnico Nacional, Mexico (SIP20150597)

Subjects
DNA, Bacterial, China, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Mesorhizobium jarvisii, Applied Microbiology and Biotechnology, Microbiology, Plant Root Nodulation, Genetic diversity, Rhizobia, 03 medical and health sciences, Soil, RNA, Ribosomal, 16S, Botany, Symbiosis, Ecology, Evolution, Behavior and Systematics, Phylogeny, Soil Microbiology, 030304 developmental biology, 0303 health sciences, Phylogenetic tree, biology, 030306 microbiology, Mesorhizobium, Genetic Variation, Genes, rRNA, Astragalus Plant, Ribosomal RNA, Southwest China, biology.organism_classification, 16S ribosomal RNA, Housekeeping gene, RNA, Bacterial, RNA, Ribosomal, 23S, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Biogeography, Genes, Bacterial, Restriction fragment length polymorphism, Astragalus sinicus L, Root Nodules, Plant, Polymorphism, Restriction Fragment Length
Abstract

International audience; In order to identify rhizobia ofAstragalus sinicus L. and estimate their geographic distribution in the Southwest China, native rhizobia nodulating A. sinicus were isolated and their genetic diversity were studied at 13 sites cultivated in four Chinese provinces. A total of 451 rhizobial isolates were trapped with A. sinicus plants from soils and classified into 8 different genotypes defined by PCR-based restriction fragment length polymorphism (RFLP) of 16S-23S rRNA intergenic spacer (IGS). Twenty-one representative strains were further identified into three defined Mesorhizobium species by phylogenetic analyses of 16S rRNA genes and housekeeping genes (glnII and atpD). M. jarvisii was dominant accounting for 76.3% of the total isolates, 22.8% of the isolates were identified as M. huakuii and five strains belonged to M. qingshengii. All representatives were assigned to the symbiovar astragali by sharing high nodC sequence similarities of more than 99%. Furthermore, the biogeography distribution of these rhizobial genotypes and species was mainly affected by contents of available phosphorus, available potassium, total salts and pH in soils. The most remarkable point was the identification of M. jarvisii as a widespread and predominant species of A. sinicus in southwest of China. These results revealed a novel geographic pattern of rhizobia associated with A. sinicus in China.

Published
2020

11. Genomic diversity of chickpea-nodulating rhizobia in Ningxia (north central China) and gene flow within symbiotic Mesorhizobium muleiense populations

Author

Liu Yifei, Yimin Shang, Shanshan Peng, Euan K. James, Junjie Zhang, Brigitte Brunel, En Tao Wang, Raghvendra Singh, Shuo Li, Yongfeng Zhao, Wenfeng Chen, Zhengzhou University of Light Industry, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Partenaires INRAE, Collaborative Innovation Center for Food Production and Safety of Henan Province, Laboratoire des symbioses tropicales et méditerranéennes (UMR LSTM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Guyuan Branch of Ningxia Academy of Agricultural and Forestry Sciences, China Agricultural University Library, Instituto Politecnico Nacional [Mexico] (IPN), Uttaranchal University, The James Hutton Institute, National Natural Science Foundation of China (NSFC) (31970006), and Instituto Politecnico Nacional, Mexico (SIP20150597)

Subjects
Mesorhizobium muleiense, DNA, Bacterial, Gene Flow, Genotyping, China, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Genotype, Population, Alkaline soils, Applied Microbiology and Biotechnology, Microbiology, Rhizobia, Gene flow, 03 medical and health sciences, Soil, Symbiosis, Phylogenetics, RNA, Ribosomal, 16S, Botany, Cicer arietinum L, education, Ecology, Evolution, Behavior and Systematics, Phylogeny, Soil Microbiology, 030304 developmental biology, 0303 health sciences, education.field_of_study, Genes, Essential, biology, 030306 microbiology, Strain (biology), Mesorhizobium, food and beverages, Genetic Variation, 15. Life on land, biology.organism_classification, 16S ribosomal RNA, Cicer, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Genes, Bacterial, Root Nodules, Plant, Genome, Bacterial
Abstract

International audience; Diversity and taxonomic affiliation of chickpea rhizobia were investigated from Ningxia in north central China and their genomic relationships were compared with those from northwestern adjacent regions (Gansu and Xinjiang). Rhizobia were isolated from root-nodules after trapping by chickpea grown in soils from a single site of Ningxia and typed by IGS PCR-RFLP. Representative strains were phylogenetically analyzed on the basis of the 16S rRNA, housekeeping (atpD, recA and gln11) and symbiosis (nodC and nifH) genes. Genetic differentiation and gene flow were estimated among the chickpea microsymbionts from Ningxia, Gansu and Xinjiang. Fifty chickpea rhizobial isolates were obtained and identified as Mesorhizobium muleiense. Their symbiosis genes nodC and nifH were highly similar (98.4 to 100%) to those of other chickpea microsymbionts, except for one representative strain (NG24) that showed low nifH similarities with all the defined Mesorhizobium species. The rhizobial population from Ningxia was genetically similar to that from Gansu, but different from that in Xinjiang as shown by high chromosomal gene flow/low differentiation with the Gansu population but the reverse with the Xinjiang population. This reveals a biogeographic pattern with two main populations in M. muleiense, the Xinjiang population being chromosomally differentiated from Ningxia-Gansu one. M. muleiense was found as the sole main chickpea-nodulating rhizobial symbiont of Ningxia and it was also found in Gansu sharing alkaline-saline soils with Ningxia. Introduction of chickpea in recently cultivated areas in China seems to select from alkaline-saline soils of M. muleiense that acquired symbiotic genes from symbiovar ciceri.

Published
2020

12. An efficient resource allocation scheme for VoD services over window-based P2P networks

Author

Noé Torres-Cruz, Mario E. Rivero-Angeles, Ricardo Menchaca-Mendez, Rolando Menchaca-Mendez, Gerardo Rubino, UPIITA-IPN [Mexico], Instituto Politecnico Nacional [Mexico] (IPN), Dependability Interoperability and perfOrmance aNalYsiS Of networkS (DIONYSOS), Inria Rennes – Bretagne Atlantique, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES (IRISA-D2), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique)

Subjects
Scheme (programming language), Computer Networks and Communications, Computer science, media_common.quotation_subject, 02 engineering and technology, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Upload, 0202 electrical engineering, electronic engineering, information engineering, Media Technology, Network performance, Function (engineering), media_common, computer.programming_language, 020203 distributed computing, Markov chain, business.industry, Quality of service, Process (computing), 020206 networking & telecommunications, [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, Hardware and Architecture, Resource allocation, business, computer, Software, Computer network
Abstract

International audience; In this paper we describe a novel scheme that efficiently distributes the resources provided by seeders in a P2P network for Video on Demand (VoD) services. In the proposed scheme, that we have called Prioritized-Windows Distribution (PWD), the amount of seeders' resources assigned to a peer depends on its current progress in the process of downloading a video which is divided into ordered fragments (windows). We demonstrate through a fluid model analysis and Markov chain numerical evaluations that PWD improves the P2P network performance in terms of the level of cooperation that is required from seeders to keep the system under abundance conditions. Additionally, we analyze the performance of the system as a function of two parameters that highly influence the Quality of Service (QoS) perceived by the users, namely, the initial playback delay and the time required to download the video. Our results show that PWD outperforms previous proposals. Keywords Video on demand (VoD) · Peer to peer (P2P) network · Resource allocation · Markovian model · Fluid model · Video quality of service (QoS)

Published
2018

13. Evolution of southern Mexican Pacific coastline: Responses to meteo-oceanographic and physiographic conditions

Author

Norma Patricia Muñoz-Sevilla, Priyadarsi D. Roy, Gowrappan Muthusankar, P. F. Rodríguez-Espinosa, P. Godwyn-Paulson, M.P. Jonathan, C. Lakshumanan, Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politecnico Nacional [Mexico] (IPN), Instituto de Geología, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), and Centre for Disaster Management and Coastal Research, Department of Remote Sensing, Bharathidasan University

Subjects
Oaxaca coast, 010504 meteorology & atmospheric sciences, Meteo-oceanographic impact, Wetland, Aquatic Science, 01 natural sciences, Future prediction, Short/long-term rate, 0502 economics and business, Ecosystem, 14. Life underwater, Mexico, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, Ecology, Evolution, Behavior and Systematics, 0105 earth and related environmental sciences, Shore, geography, geography.geographical_feature_category, Ecology, Discharge, 05 social sciences, Landsat imagery, Estuary, 15. Life on land, Oceanography, 13. Climate action, Erosion, Environmental science, Animal Science and Zoology, Coastal management, 050203 business & management, Accretion (coastal management)
Abstract

The coast of Oaxaca, along the southern Mexican Pacific coastline, is home to diverse ecosystems, which undergoes significant erosion and accretion due to natural and anthropogenic influences. This study aims in analysing the historical shoreline variations and predicting the future changes for better coastal management plans. In order to study the long-term variations in shoreline, Landsat time-series satellite imageries between 1973 and 2020 were evaluated. Overall, the results indicate that the coast is highly dominated by accretion (74%) process, with the most significant changes occurring at the estuarine areas and beaches. Linear Regression Rate (LRR) and Weighted Linear Regression (WLR) methods showed mean variations at rates of 1.2 ± 2.5 and 0.4 ± 2.5 m/yr for the long-term period. The analysis of seven short-term periods (for every 5 years between 1986–2020) identified the maximum mean erosion of −20.6 m during 2005–2010 and accretion of 18.7 m during 2000–2005. However, the forecasted rate of change for the period 2030 and 2040 using End Point Rate (EPR) statistics revealed that the northern region would continue to move seaward at a rate of + 0 . 26 m/yr and the coastline of southern region would move landward at a possible rate of − 0 . 45 m/yr. The natural factors such as rainfall, river discharge, hurricane, and wave dynamics are the main drivers of shoreline changes along the estuarine and wetland areas. Contrarily, the anthropogenic factors such as breakwaters and urbanization are responsible for coastline dynamics along the beaches and ports. Henceforth, the estuarine region, lagoon openings, and tourist beaches require utmost attention as the sediment flow in these regions are not monitored constantly.

Published
2021

14. Vapor-phase impregnation decomposition technique as an alternativeto decorate MWCNTs withPt and PdNPs for ammonia gas detection

Author

J. Oliva, Khalifa Aguir, S. Capula-Colindres, J. C. Velázquez, G. Terán, O.G. Súchil, E. Torres-Santillan, Instituto Politecnico Nacional [Mexico] (IPN), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Instituto Potosino de Investigacion Cientifica y Tecnologica (IPICYT), and Consejo Nacional de Ciencia y Tecnología [Mexico] (CONACYT)

Subjects
Materials science, Vapor phase, Multi-walled carbon nanotubes, Carbon nanotube, [SPI.MAT]Engineering Sciences [physics]/Materials, law.invention, Metal, Ammonia, chemistry.chemical_compound, Colloid and Surface Chemistry, Electrical resistance and conductance, Chemiresistive senso, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, law, r Platinum, Materials Chemistry, Interdigitated electrode, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Physical and Theoretical Chemistry, Ammonia gas, Decomposition, Surfaces, Coatings and Films, Paladium, chemistry, Chemical engineering, Ammonia gas detection, visual_art, visual_art.visual_art_medium, Dispersion (chemistry), Biotechnology
Abstract

International audience; The Vapor Phase Impregnation decomposition method (VP-IDM) is presented in this study as an alternative technique to obtain well-dispersed metallic nanoparticles on CNTs, for ammonia (NH 3) gas detection. We have analyzed the effectiveness of this method by using chemiresistive sensors (CHRs) based on multi-walled carbon nanotubes (MWCNTs) decorated with Pt and Pd nanoparticles (NPs). We measured their sensitivity through their electrical resistance variation in the presence of NH 3 gas at concentrations from 10 to 200 ppm. Pt/MWCNTs showed the highest sensitivity of about 120% at 100 ppm and 250 • C. It was revealed that the size, dispersion, temperature and type of metal NPs deposited on the MWCNTs are crucial for the detection of the NH 3 gas by the CHRs.

Published
2021

15. Prácticas lingüísticas en la clase de matemáticas. Una experiencia de profesionalización online para profesores de matemáticas

Author

Romo Vázquez, Avenilde, Hache, Christophe, Inst Politecn Nacl, CICATA, Queretaro 76090, Mexico, Instituto Politecnico Nacional [Mexico] (IPN), IREM de Paris, Université Paris Diderot - Paris 7 (UPD7), Laboratoire de Didactique André Revuz (LDAR (EA_4434)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université Paris Diderot - Paris 7 (UPD7)-Université d'Artois (UA), Université d'Artois (UA)-Université Paris Diderot - Paris 7 (UPD7)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Rouen Normandie (UNIROUEN), and Normandie Université (NU)-Normandie Université (NU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)

Subjects
[MATH.MATH-HO]Mathematics [math]/History and Overview [math.HO], [SHS.EDU]Humanities and Social Sciences/Education, _Otro (fenomenología didáctica), Competencias, Continua-Permanente, E-learning, ComputingMilieux_MISCELLANEOUS
Abstract

Este artículo parte de la relación constitutiva entre lengua y pensamiento, y por tanto de la importancia del lenguaje en los fenómenos de aprendizaje. En clase, los alumnos estudian nociones y resultados matemáticos, descubriendo al mismo tiempo los conceptos y la manera en la cual se habla de ellos. Así, el lenguaje juega un rol fundamental en la enseñanza de las matemáticas y se ha convertido en un objeto de estudio dentro de la Educación Matemática. Es por ello, que se diseñó e implementó una Unidad de Aprendizaje (UA) en un programa de desarrollo profesional para profesores de matemáticas, basada en elementos, competencia y experiencia, de las Comunidades de Práctica (Wenger, 1998 y 2010), así como en los principios de Scott y Scott (2010). La UA fue implementada en un programa en la modalidad en línea y a distancia en el que participan profesores de diferentes partes de México y de América Latina. Su análisis muestra cómo el diseño de la UA posibilitó diferentes procesos de alineación entre la competencia propuesta y la experiencia de los profesores de matemáticas.

Published
2019

16. Paleobiodiversity and tectono-sedimentary records in the Mediterranean tethys and related eastern areas

Author

Thouraya Benmoussa, Saadi Abdeljaouad, Samia Khsiba, Kerim Mustapha, Mounir Medhioub, Oula Amrouni, Abdelaziz Sebei, Alessio Satta, Yu Fisjak, Lassâad Chouba, Nejmeddine Akrout, Laurent Dezileau, Nadia Gaâloul, Alberto Sánchez, Fatma Kotti, Hakim Abichou, Michel Condomines, Claudine Dieulin, Ahmed Ghadoum, Abderraouf Hzami, Hechmi Missaoui, Nabil Khélifi, François Sabatier, Wième Ouertani, Domenico Chiarella, Chrystelle Bancon-Montigny, Abdallah Hattour, Boughdiri, M. (ed.), Badenas, B. (ed.), Selden, P. (ed.), Jaillard, E. (ed.), Bengtson, P. (ed.), Granier, B.R.C. (ed.), Institut National des Sciences et Technologies de la Mer [Salammbô] (INSTM), Hydrosciences Montpellier (HSM), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université de Tunis El Manar (UTM), Université de Tunis, Department of Earth Sciences, University of London, Queen Mary University of London (QMUL), University of London [London], Géosciences Montpellier, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS), Institut National du Patrimoine - Tunisie (INP), Helmholtz Centre for Ocean Research [Kiel] (GEOMAR), Université de Sfax - University of Sfax, Aix Marseille Université (AMU), Centro Interdisciplinario de Ciencias Marinas, Instituto Politecnico Nacional [Mexico] (IPN), DICAAR, Università degli Studi di Cagliari, Cagliari, Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), and Università degli Studi di Cagliari = University of Cagliari (UniCa)

Subjects
Mediterranean climate, 010504 meteorology & atmospheric sciences, ECOSYSTEME, Ecology (disciplines), 0207 environmental engineering, 02 engineering and technology, Mediterranean, Coastal geography, 01 natural sciences, FACTEUR ANTHROPIQUE, Sensitivity, Hydrology (agriculture), Mediterranean sea, Multidisciplinary approach, SEDIMENTATION MARINE, COTE, Ecosystem, 14. Life underwater, [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology, 020701 environmental engineering, ComputingMilieux_MISCELLANEOUS, Coast, 0105 earth and related environmental sciences, business.industry, Environmental resource management, Sediment, GEOMORPHOLOGIE, RYSCMED, EVOLUTION, 6. Clean water, COURS D'EAU, GEOCHIMIE, 13. Climate action, FACTEUR CLIMATIQUE, MER, Medjerda River, Environmental science, business, ZONE HUMIDE, ECOLOGIE
Abstract

The present work is based on The RYSCMED project supported by PHC-UTIQUE 2016-2018 (16G 1005 –34854QC). The RYSCMED is an interdisciplinary project which gathers different disciplines (e.g. sedimentology, hydrology, geochemistry, ecology, paleontology, biochemistry, archeology) to quantify the sediment flow of the land-sea. This research aims at identifying coastal sediment dynamics (via the sand supply sources; i.e. Medjerda River) and hydrodynamic parameters to understand the local environmental problems in an urbanized coastal framework. The outcome is expected to produce original and new findings about the link between dams, river hydrology and sediment origin to the sea, with the impact of climate and anthropogenic activities on the coastal geomorphology and ecosystem sensitivity. The main scientific outcome will be addressed to the socio-economic actors to implement necessary solutions for remediating the Mediterranean coastal vulnerability. (Abstract author)

Published
2019

17. Desiccation-induced viable but nonculturable state in Pseudomonas putida KT2440, a survival strategy

Author

Laura Abisaí Pazos-Rojas, Yolanda Elizabeth Morales-García, Jesús de la Torre, Ligia Catalina Munoz-Arenas, Silvia Luna-Suárez, Osvaldo Rodríguez-Andrade, Lesther Emanuel López-Cruz, Verónica Quintero-Hernández, Jesús Muñoz-Rojas, Miguel Angel Villalobos-López, Antonino Baez, Fábio Lopes-Olivares, Orestes López-Ortega, Bodescot, Myriam, Ecology and Survival of Microorganisms Research Group [Puebla, Mexique] (ESMRG), Laboratorio de Ecología Molecular Microbiana [Puebla, Mexique] (LEMM), Centro de Investigaciones en Ciencias Microbiológicas [Puebla, Mexique] (CICM), Instituto de Ciencias [Puebla, Mexique] (IC), Benemérita Universidad Autónoma de Puebla (BUAP)-Benemérita Universidad Autónoma de Puebla (BUAP)-Instituto de Ciencias [Puebla, Mexique] (IC), Benemérita Universidad Autónoma de Puebla (BUAP)-Benemérita Universidad Autónoma de Puebla (BUAP)-Centro de Investigaciones en Ciencias Microbiológicas [Puebla, Mexique] (CICM), Benemérita Universidad Autónoma de Puebla (BUAP)-Benemérita Universidad Autónoma de Puebla (BUAP), Centro de Investigación en Biotecnología Aplicada [Tlaxcala, Mexique] (CIBA), Instituto Politecnico Nacional [Mexico] (IPN), Licenciatura en Biotecnología [Puebla, Mexique], Facultad de Ciencias Biológicas [Puebla, Mexique], Facultad de Ingeniería Ambiental [Puebla, Mexique], Universidad Popular Autónoma de Puebla [Puebla, Mexique], Immunité et cancer (U932), Université Paris Descartes - Paris 5 (UPD5)-Institut Curie [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM), Núcleo de Desenvolvimento de Insumos Biológicos para a Agricultura [Rio de Janeiro, Brésil] (NUDIBA), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Consejo Nacional de Ciencia y Tecnología [Mexico] (CONACYT), Department of Environmental Protection [Grenade, Espagne], Estación Experimental del Zaidín [Grenade, Espagne], Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), This work is supported by: JMR: Apoyo Redes PRODEP 2015-2016 (CA-262 and CA-244), JMR: DITCo2016-3, JMR: DITCo2016-4, VIEPBUAP-2018 (VQH: COL525704-VIEP2018, and ABR: 100524554-VIEP2018, JMR: 100425788-VIEP2018).

Subjects
Colony Count, Microbial, Oligonucleotides, Gene Expression, Plant Science, Disaccharides, Plant Roots, chemistry.chemical_compound, Fluorescence Microscopy, RNA, Ribosomal, 16S, 2. Zero hunger, 0303 health sciences, Microscopy, Multidisciplinary, biology, Strain (chemistry), Ecology, Chemistry, Organic Compounds, Temperature, Eukaryota, Light Microscopy, Plants, Pseudomonas putida, 3. Good health, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Experimental Organism Systems, Rhizosphere, Physical Sciences, Medicine, Bacterial outer membrane, Research Article, Mismatch repair complex, Science, Green Fluorescent Proteins, Carbohydrates, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, Research and Analysis Methods, Zea mays, Viable but nonculturable, Microbiology, 03 medical and health sciences, Model Organisms, Plant and Algal Models, Pseudomonas, Plant-Environment Interactions, Genetics, Grasses, Desiccation, [SDV.MP] Life Sciences [q-bio]/Microbiology and Parasitology, [SDV.BC] Life Sciences [q-bio]/Cellular Biology, 030304 developmental biology, Bacteria, 030306 microbiology, Plant Ecology, Organic Chemistry, Ecology and Environmental Sciences, Organisms, Chemical Compounds, Trehalose, Biology and Life Sciences, Humidity, Iodides, biology.organism_classification, Maize, Microscopy, Fluorescence, RNA, Ribosomal, Animal Studies
Abstract

The potential of Pseudomonas putida KT2440 to act as a plant-growth promoter or as a bior-emediator of toxic compounds can be affected by desiccation. In the present work, the bacterial survival ratio (BSR) in response to air desiccation was evaluated for P. putida KT2440 in the presence of different protectors. The BSR in the presence of nonreducing disaccharides, such as trehalose, was high after 15 days of desiccation stress (occurring at 30C and 50% relative humidity), whereas in the absence of a protector the bacterial counts diminished to nondetectable numbers (ca 2.8 log CFU/mL). The LIVE/DEAD staining method showed that bacteria protected with trehalose maintained increased numbers of green cells after desiccation while cells without protection were all observed to be red. This indicated that nonprotected bacteria had compromised membrane integrity. However, when nonprotected bacteria subjected to 18 days of desiccation stress were rehydrated for a short time with maize root exudates or for 48 h with water (prolonged rehydration), the bacterial counts were as high as that observed for those not subjected to desiccation stress, suggesting that the cells entered the viable but nonculturable (VBNC) state under desiccation and that they returned to a culturable state after those means of rehydration. Interestingly an increase in the green color intensity of cells that returned to a culturable state was observed using LIVE/ DEAD staining method, indicating an improvement in their membrane integrity. Cellular activity in the VBNC state was determined. A GFP-tagged P. putida strain expressing GFP constitutively was subjected to desiccation. After 12 days of desiccation, the GFP-tagged strain lost culturability, but it exhibited active GFP expression, which in turn made the cells green. Furthermore, the expression of 16S rRNA, rpoN (housekeeping), mutL, mutS (encoding proteins from the mismatch repair complex), and oprH (encoding an outer membrane protein) were examined by RT-PCR. All evaluated genes were expressed by both types of cells, culturable and nonculturable, indicating active molecular processes during the VBNC state., This work is supported by: JMR: Apoyo Redes PRODEP 2015-2016 (CA-262 and CA-244); JMR: DITCo2016-3, JMR: DITCo2016-4; VIEP-BUAP-2018 (VQH: COL525704-VIEP2018; ABR: 100524554-VIEP2018, JMR: 100425788-VIEP2018). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Published
2019

18. Coastal erosion vs man-made protective structures: evaluating a two-decade history from southeastern India

Author

K. Srinivasa-Raju, C. Lakshumanan, M.P. Jonathan, Gowrappan Muthusankar, Priyadarsi D. Roy, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Instituto Politechnico National (IPN), Instituto Politecnico Nacional [Mexico] (IPN), Bharathidasan University [Tiruchirappalli, India], Universidad Nacional Autónoma de México (UNAM), Department of Civil Engineering, and University of Hyderabad

Subjects
0106 biological sciences, Accretion, Atmospheric Science, 010504 meteorology & atmospheric sciences, [SDE.MCG]Environmental Sciences/Global Changes, 01 natural sciences, Tamil Nadu, Seawall, Mining engineering, Natural hazard, Earth and Planetary Sciences (miscellaneous), 0105 earth and related environmental sciences, Water Science and Technology, Shoreline changes, Shore, geography, geography.geographical_feature_category, Puducherry, 010604 marine biology & hydrobiology, GIS, language.human_language, Coastal erosion, Erosion, Tamil, Breakwater, language, Southeast coast of India, Physical geography, [SDV.EE.BIO]Life Sciences [q-bio]/Ecology, environment/Bioclimatology, Accretion (coastal management)
Abstract

International audience; Remote sensing images of AD 1991–2011 and field observations help evaluate shoreline changes (erosion and accretion) in Puducherry and Tamil Nadu states of southeastern India. A minor harbor was constructed during AD 1986–1989 in the coast of Puducherry, and it initiated the gradual process of shoreline modification. In the subsequent years, beaches located toward the north of the harbor suffered erosion (−0.12–−4.19 m/year) and there was accretion (0.27–7.25 m/year) in the southern beaches. However, the man-made structures (seawall and groin) have reduced the shoreline changes after AD 2004. In the last two decades, the rate of erosion area-wise gradually decreased (0.24–0.013 km2/year) and accretion remained constant (0.019 km2/year). Our results suggest that accretion happened in the southern side of the breakwaters and erosion occurred in the northern part. Presence of groins structures in the region in the northern part has also provoked accretion in the south and erosion in the northern side close to the State of Tamil Nadu.

Published
2016

19. Observability of singular time-delay systems with unknown inputs

Author

Gang Zheng, Francisco Javier Bejarano, Escuela Superior de Ingeniería Mecánica y Eléctrica - Unidad Profesional Ticomán (ESIME-UPT), Instituto Politecnico Nacional [Mexico] (IPN), Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, and Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)

Subjects
0209 industrial biotechnology, Commensurate delay systems, General Computer Science, Mechanical Engineering, Polynomial ring, State vector, 02 engineering and technology, Singular systems, Observability analysis, 020901 industrial engineering & automation, Control and Systems Engineering, Control theory, Singular solution, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, 0202 electrical engineering, electronic engineering, information engineering, Applied mathematics, 020201 artificial intelligence & image processing, Observability, Electrical and Electronic Engineering, Singular linear systems, Mathematics
Abstract

International audience; In this manuscript we give sufficient conditions guaranteeing the observability of singular linear systems with commensurable delays affected by unknown inputs appearing in both the state equation and the output equation. These conditions allow for the reconstruction of the entire state vector using past and actual values of the system output. The obtained conditions coincide with known necessary and sufficient conditions of singular linear systems without delays.

Published
2016

20. Mezcal as a Novel Source of Mixed Yeasts Inocula for Wine Fermentation

Author

Francisco Javier De la Torre-González, Patricia Taillandier, J. A. Narváez-Zapata, C. P. Larralde-Corona, Innovak Global, Instituto Politecnico Nacional [Mexico] (IPN), Laboratoire de Génie Chimique (LGC), 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-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique - CNRS (FRANCE), Innovak Global (MEXICO), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Instituto Politécnico Nacional - IPN (MEXICO), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), and Laboratoire de Génie Chimique - LGC (Toulouse, France)

Subjects
0106 biological sciences, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, non-Saccharomyces, Zygosaccharomyces bailii, Non-Saccharomyces, Population, Ingénierie des aliments, Bioengineering, lcsh:Chemical technology, 01 natural sciences, Saccharomyces, lcsh:Chemistry, Mezcal, 03 medical and health sciences, Torulaspora delbrueckii, Kluyveromyces marxianus, 010608 biotechnology, [SDV.IDA]Life Sciences [q-bio]/Food engineering, Chemical Engineering (miscellaneous), lcsh:TP1-1185, Food science, education, Yeasts mixed inoculum, 2. Zero hunger, Fermentation in winemaking, Wine, 0303 health sciences, education.field_of_study, biology, 030306 microbiology, Chemistry, Process Chemistry and Technology, food and beverages, biology.organism_classification, lcsh:QD1-999, Fermentation
Abstract

Mezcal yeasts were evaluated for their potential as grape-juice fermenters, characterizing their fermentation performance, both in terms of primary and volatile metabolites. Experiments were first carried-out in a semi-synthetic medium and then on grape juice, and population dynamics of the chosen mixed inoculum was assessed in grape juice. Accordingly, we initially tested 24 mezcal yeasts belonging to ten different species, and chose those that were more productive and stress tolerant for the mixed (dual) inoculum, having a final selection of three Saccharomyces cerevisiae strains (plus Fermichamp, a commercial wine strain) and three non-Saccharomyces strains, belonging to Kluyveromyces marxianus, Torulaspora delbrueckii, and Zygosaccharomyces bailii species. For the combination S. cerevisiae/T. delbrueckii (Sc/Td) mixed inoculum, we observed increasing isoamyl alcohol and phenyl ethyl acetate concentrations, as compared with the use of individual Saccharomyces strains, which resulted in a fruitier aroma profile. Alcohol final concentration was in average lower for the Sc/Td inoculum (fermentation power, FP, 13.6) as compared with the individual mezcal Saccharomyces strains (FP 14.3), and it was the highest when Td was co-cultured with the commercial strain (FP 14.6). Overall, our results show the feasibility of using yeasts isolated from mezcal as a novel source of inoculum for wine-type fermentation.

Published
2020

21. Observability analysis of linear singular time-delay systems

Author

Shunjie Li, Francisco Javier Bejarano, Gang Zheng, Instituto Politecnico Nacional [Mexico] (IPN), Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Deformable Robots Simulation Team (DEFROST ), School of Mathematics and Statistics [Nanjing University] (SMS - NUIST), Nanjing University of Information Science and Technology (NUIST), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, and Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)

Subjects
0209 industrial biotechnology, 02 engineering and technology, Singular systems, State (functional analysis), 020901 industrial engineering & automation, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, Time derivative, 0202 electrical engineering, electronic engineering, information engineering, Trajectory, sort, Applied mathematics, 020201 artificial intelligence & image processing, Observability, Algebraic number, Mathematics
Abstract

International audience; — This paper deals with the observability problem of a sort of singular systems with commensurate time-delays in the trajectory of the state, in the time derivative of the trajectory of the state (neutral terms), and in the output system. By using a recursive algorithm, sufficient conditions (easy testable) are proposed for guaranteeing the backward and the algebraic observability of the system.

Published
2017

22. Unknown input observer for linear time-delay systems

Author

Francisco Javier Bejarano, Jean-Pierre Richard, Gang Zheng, Wilfrid Perruquetti, Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Non-Asymptotic estimation for online systems (NON-A), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Escuela Superior de Ingeniería Mecánica y Eléctrica - Unidad Profesional Ticomán (ESIME-UPT), Instituto Politecnico Nacional [Mexico] (IPN), Centrale Lille, Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), and Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
commensurate delays, Large class, 0209 industrial biotechnology, Observer (quantum physics), Linear system, observer, unknown inputs, 02 engineering and technology, Sense (electronics), 020901 industrial engineering & automation, Control and Systems Engineering, Control theory, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, State observer, Electrical and Electronic Engineering, Time complexity, Delay systems, Mathematics
Abstract

International audience; This paper investigates an unknown input observer design for a large class of linear systems with unknown inputs and commensurate delays. A Luenberger-like observer is proposed by involving only the past and actual values of the system output. The required conditions for the proposed observer are considerably relaxed in the sense that they coincide with the necessary and sufficient conditions for the unknown input observer design of linear systems without delays.

Published
2015

23. Identifying the stress–strain curve of materials by microimpact testing. Application on pure copper, pure iron, and aluminum alloy 6061-T651

Author

Cécile Langlade, Halim Al Baida, Guillaume Kermouche, R.R. Ambriz, Laboratoire d'Études et de Recherches sur les Matériaux, les Procédés et les Surfaces (IRTES - LERMPS), Université de Technologie de Belfort-Montbeliard (UTBM)-Institut de Recherche sur les Transports, l'Energie et la Société - IRTES, Centre Science des Matériaux et des Structures (SMS-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire Georges Friedel (LGF-ENSMSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), PMM-ENSMSE- Département Physique et Mécanique des Matériaux, and Instituto Politecnico Nacional [Mexico] (IPN)

Subjects
Materials science, medicine.medical_treatment, Alloy, SPHERICAL INDENTATION, chemistry.chemical_element, 02 engineering and technology, engineering.material, Shot peening, 0203 mechanical engineering, Aluminium, Indentation, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], medicine, General Materials Science, RATES, Mechanical Engineering, Metallurgy, Stress–strain curve, Traction (orthopedics), Strain rate, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Compression (physics), 020303 mechanical engineering & transports, chemistry, SHARP INDENTATION, Mechanics of Materials, engineering, METALS, 0210 nano-technology, BEHAVIOR
Abstract

International audience; The mechanical response of materials under repeated impact loading is of primary importance to model different types of surface mechanical treatments, such as shot peening. A reverse identification method of stress-strain curves using repeated impact has been developed by Kermouche et al. [Kermouche et al., Mater. Sci. Eng., A 569, 71-77 (2013)] and later improved by Al Baida et al. [Al Baida et al., Mech. Mater. 86, 11-20 (2015)]. This study deals with the experimental validation of this method on three materials: a home-made pure iron, a commercially pure copper, and an industrial aluminum alloy. An approximate method derived from cone indentation theory to check the reverse method reliability. Balls of different sizes have been used to cover a wide enough range of strain. The results are also compared with macroscopic compression and traction tests. The effect of the strain rate on the stress-strain curve is discussed. The conclusion section highlights the rapidity and the ease of use of the reverse identification method.

Published
2015

24. Observation of Nonlinear Differential-Algebraic Systems With Unknown Inputs

Author

Wilfrid Perruquetti, Thierry Floquet, Francisco Javier Bejarano, Gang Zheng, Escuela Superior de Ingeniería Mecánica y Eléctrica - Unidad Profesional Ticomán (ESIME-UPT), Instituto Politecnico Nacional [Mexico] (IPN), Systèmes Non Linéaires et à Retards (SyNeR), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centrale Lille, Non-Asymptotic estimation for online systems (NON-A), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), F.J. Bejarano acknowledges INRIA Lille-Nord Europe, where he held a Post-doctoral position with Non-A team, and the support of Proyecto SIP 20141364 from IPN., Inria Lille - Nord Europe, and Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL)

Subjects
Differential equation, sliding mode high order differentiation, observer design, Computer Science Applications, Nonlinear system, Control and Systems Engineering, Control theory, Distributed parameter system, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, State space, [INFO]Computer Science [cs], State observer, Observability, Electrical and Electronic Engineering, Differential algebraic geometry, Differential algebraic equation, Differential-Algebraic systems, Mathematics
Abstract

International audience; A method to carried out the state estimation is proposed for a class of nonlinear systems with unknown inputs whose dynamics is governed by differential-algebraic equations (DAE). We achieve, under suitable conditions, to replace the original DAE for a system with differential equations only by using a zeroing manifold algorithm inducing a state space dimension reduction. Observability conditions can be checked using the original system parameters. The state estimation is done using a sliding mode high order differentiator.

Published
2015

25. From Plant Exploitation to Mutualism

Author

F. Lieutier, K. Bermudez-Torres, J. Cook, M.O. Harris, L. Legal, A. Sallé, B. Schatz, D. Giron, Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), Institut National de la Recherche Agronomique (INRA)-Université d'Orléans (UO), Instituto Politecnico Nacional [Mexico] (IPN), Western Sydney University, North Dakota State University (NDSU), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut de recherche sur la biologie de l'insecte UMR7261 (IRBI), Université de Tours-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), and Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0106 biological sciences, Pollination, Dioecy, Plant exploitation, Biology, Generalist and specialist species, 010603 evolutionary biology, 01 natural sciences, Overcoming of plant defences, Predation, Mutualism, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Plant remodelling, 2. Zero hunger, Abiotic component, Mutualism (biology), Herbivore, Fig–fig wasps association, Ecology, Host (biology), fungi, food and beverages, 15. Life on land, Protection against predation, Plant manipulation, 010606 plant biology & botany
Abstract

International audience; Phytophagous insects have developed mechanisms of various complexity levels to utilize plants in spite of the barriers that plants have built to resist aggressions. Plant exploitation, the simplest level, is the use of plant defence chemicals for the benefit of insects. It is illustrated by the use of plant toxins for defence against predators. The energetic cost of that defence strategy is discussed according to the toxicity of the chemicals and the necessity of protecting the herbivore, and the modes of action on predators are presented. Furthermore, manipulation of the plant can reorient the plant metabolism to satisfy insect needs. Drastic remodelling of the host plant can occur, from ultrastructure to anatomy levels, with alteration of both its nutritional quality and secondary metabolism. The mechanisms involved are being investigated. Outcomes concern optimization of the nutritional value of the host plant and protection from adverse abiotic and biotic (natural enemies, competition) conditions. Cooperation with conspecifics or microorganisms often interferes. At the highest level of complexity, mutualism is the result of a compromise between insect and plant where each partner benefits from the association. Pollination is a typical example. Pollinators vary from generalists to specialists and belong to a community of insect linked to a community of plants. In the fig–fig wasp mutualism, the various mechanisms involved in situations of monoecy and dioecy are discussed, as well as the existence of coadaptations and cospeciations. The chapter ends with a presentation of research perspectives for improving crop productivity.

Published
2017

26. Hydrogen storage in activated carbons produced from coals of different ranks: Effect of oxygen content

Author

Alain Celzard, M. C. Tellez-Juarez, Edilso Reguera, N. Fernandez-Huerta, Weigang Zhao, Maria Izquierdo, Vanessa Fierro, Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centro de Investigación en Ciencia Aplicada y Tecnologia Avanzada, Instituto Politecnico Nacional [Mexico] (IPN), Ecole Nationale Supérieure des Technologies et Industries du Bois (ENSTIB), Université de Lorraine (UL), Fujian Agriculture and Forestry University (FAFU), Carbon Nanostructures and Nanotechnology Group (ICB-CSIC), and Carbon Nanostructures and Nanotechnology Group

Subjects
Inorganic chemistry, Energy Engineering and Power Technology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Hydrogen adsorption, [SPI.MAT]Engineering Sciences [physics]/Materials, Hydrogen storage, chemistry.chemical_compound, Desorption, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], medicine, Oxygen content, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Potassium hydroxide, Renewable Energy, Sustainability and the Environment, Chemistry, Anthracite, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, [CHIM.POLY]Chemical Sciences/Polymers, Fuel Technology, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph], 0210 nano-technology, Activated carbon, medicine.drug
Abstract

International audience; 20 activated carbons (ACs) were prepared by activation of four coals of different ranks (bituminous, low-ash bituminous and sub-bituminous coals, and one anthracite) with potassium hydroxide, in order to evaluate their hydrogen storage capacities at -196 degrees C. The effect of surface area and oxygen content on hydrogen storage was examined. Oxygen content was determined by temperature-programmed desorption. The significance of oxygen content on hydrogen storage capacity was evaluated by Analysis of Variance (ANOVA). Apparent surface areas higher than 3000 m(2) g(-1) and hydrogen adsorption as high as 6.8 wt.% were obtained. The best results were obtained with ACs from bituminous coals. No significant effect of oxygen content on hydrogen adsorption was observed. We concluded that surface area controls hydrogen storage capacity at -196 degrees C.

Published
2014

27. Control of unstable delayed recycling systems

Author

Basilio del Muro-Cuéllar, David Fernando Novella‐Rodriguez, Rocio Jasmin Vazquez-Guerra, Domingo Cortes‐Rodríguez, J.F. Márquez-Rubio, Instituto Tecnológico y de Estudios Superiores de Monterrey (ITESM - also known as Tecnológico de Monterrey or simply as TEC), Instituto Politechnico National (IPN), Instituto Politecnico Nacional [Mexico] (IPN), GIPSA - Systèmes linéaires et robustesse (GIPSA-SLR), Département Automatique (GIPSA-DA), Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
Work (thermodynamics), Renewable Energy, Sustainability and the Environment, Computer science, Process (engineering), General Chemical Engineering, Linear Systems, Linear system, Control (management), time-delay, unstable, Direct path, 02 engineering and technology, recycling, 021001 nanoscience & nanotechnology, Stability conditions, 020401 chemical engineering, Control theory, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, Frequency domain, Path (graph theory), 0204 chemical engineering, 0210 nano-technology, Waste Management and Disposal
Abstract

International audience; This work deals with the stabilization of recycling systems with unstable dynamics at both, the direct path and the recycling paths as well as different time-delays for each path. The main contribution of this work is to provide a stabilizing strategy to the mentioned class of systems using an observer based control approach. Stability results concerning stable recycling systems or partially unstable recycling system can be found in literature. However, to the best of our knowledge, there is not stability results when unstable dynamics are considered in both paths of the recycling process. The provided necessary and sufficient stability conditions of the proposed stabilizing controllers are obtained from a frequency domain analysis.

Published
2019

28. Institutional Pressures and Green Practices in Small Agricultural Businesses in Mexico: The Mediating Effect of Farmers’ Environmental Concern

Author

Patricia S. Sánchez-Medina, Gricelda Juárez-Luis, René Díaz-Pichardo, Instituto Politecnico Nacional [Mexico] (IPN), École Supérieure de Commerce de Troyes (ESC Troyes), Groupe ESC Troyes en Champagne, Centre de Recherches et d'Etudes Interdisciplinaires sur le Développement Durable (CREIDD), Institut Charles Delaunay (ICD), and Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Geography, Planning and Development, TJ807-830, Context (language use), 010501 environmental sciences, Management, Monitoring, Policy and Law, TD194-195, 01 natural sciences, Renewable energy sources, institutional pressures, 0502 economics and business, GE1-350, Institutional theory, ComputingMilieux_MISCELLANEOUS, institutional theory, Legitimacy, 0105 earth and related environmental sciences, 2. Zero hunger, Environmental effects of industries and plants, Public economics, [SDE.IE]Environmental Sciences/Environmental Engineering, environmental concern, Renewable Energy, Sustainability and the Environment, business.industry, 05 social sciences, 15. Life on land, small agricultural business, Environmental sciences, 13. Climate action, Agriculture, Sustainability, Environmental behavior, business, 050203 business & management, green practices
Abstract

Based on institutional theory, this study develops the understanding of how the institutional environment influences the propensity to adopt green practices. Taking into consideration the limitations of institutional theory, this research explores the mediating role of farmers&rsquo, environmental concern in the relationship between institutional pressures and green practices. Environmental concern is a factor that can explain why businesses are heterogeneous in their green practices and stances even though they are embedded in the same institutional environment. Data obtained from 130 small businesses in the agricultural sector in Oaxaca, Mexico, reveal that institutional pressures influence green practices directly. The results also reveal that farmers&rsquo, environmental concern partially mediates the relationship between these variables. This study tests the applicability of the theoretical framework of the institutional theory in this context and contributes to this theory by considering the role of the farmer. Specifically, it addresses environmental concern as a means through which businesses respond to institutional pressures, and how farmers implement green practices as a means for legitimacy. Environmental concern motivates environmental behavior in search of environmental conservation, but farmers mainly implement green practices to survive in the market in response to institutional pressures.

Published
2018

29. Strain field measurement of filament-wound composites at ±55° using digital image correlation: An approach for unit cells employing flat specimens

Author

H. Hernández Moreno, Francis Collombet, Laurent Crouzeix, J. L. González Velázquez, M. Torres Arellano, Bernard Douchin, Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-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), Escuela Superior de Ingeniería Mecánica y Eléctrica - Unidad Profesional Ticomán (ESIME-UPT), Instituto Politecnico Nacional [Mexico] (IPN), ESIQIE-IPN, Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), and Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)

Subjects
Digital image correlation, Filament winding, Materials science, Field (physics), 02 engineering and technology, Epoxy, [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], 021001 nanoscience & nanotechnology, 020303 mechanical engineering & transports, 0203 mechanical engineering, Buckling, visual_art, Displacement field, Ceramics and Composites, visual_art.visual_art_medium, Composite material, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Strain gauge, Civil and Structural Engineering, Tensile testing
Abstract

Testing of filament-wound composites (FWC) with simplified methods is studied until now in order to generalize the mechanical response of FWC structures. To assure a good analogy between meso- and macro scales, it is necessary to design a representative specimen that include the characteristic winding pattern. This research aims at characterizing the strain field of FWC pattern at ±55° using flat specimens by measuring the displacement field with digital image correlation. Experimental procedure involves tensile testing of epoxy/glass specimens with two unit cells aligned at hoop and axial direction of the winding pattern. Validation of the strain values from digital image correlation is carried out by comparing them with strain gauge measurements and FEM simulations. Failure sequence and modes of FWC flat unit cells show good concordance with those observed in FWC cylinders exposed to buckling in previous works [1] .

Published
2010

30. Optimal grasping points identification for a rotational four-fingered aerogripper

Author

Matteo Giacomini, J. Vazquez, Elsa Rubio, Juan Escareno, Humberto Sossa, Instituto Politechnico National (IPN), Instituto Politecnico Nacional [Mexico] (IPN), Shape reconstruction and identification (DeFI ), Centre de Mathématiques Appliquées - Ecole Polytechnique (CMAP), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-Inria Saclay - Ile de France, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut Polytechnique des Sciences Avancées (IPSA), Inria Saclay - Ile de France, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Mathématiques Appliquées - Ecole Polytechnique (CMAP), and École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Optimization, 020301 aerospace & aeronautics, 0209 industrial biotechnology, Engineering, Grasping, business.industry, Grippers, Shape, 02 engineering and technology, [SPI.AUTO]Engineering Sciences [physics]/Automatic, 020901 industrial engineering & automation, 0203 mechanical engineering, Robustness (computer science), Robot, Computer vision, Artificial intelligence, Robustness, business, Robots, Force
Abstract

International audience; In the present paper, we deal with the grasping aspect regarding reactive object retrieving during fast aerial pick-and-place maneuevers. The paper addresses the problem of the optimal grabbing of an object by means of a 5 degrees of freedom (DoF) gripper. Also, is introduced the optimization framework for the identification of the optimal contact points between the end-effector and the object. In particular, we define an objective functional to evaluate the optimality of the contact points and we propose a preliminary strategy to identify the optimal contact points. Simulations and experimental are presented to support the actual proposal.

Published
2015

31. Preliminary results on UAV-based forest fire localization based on decisional navigation

Author

Elsa Rubio, Juan Escareno, Assia Belbachir, Humberto Sossa, Institut Polytechnique des Sciences Avancées (IPSA), Systèmes et Réseaux Intelligents (XLIM-SRI), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Centro de Investigación en Computación (CIC-IPN), and Instituto Politecnico Nacional [Mexico] (IPN)

Subjects
0209 industrial biotechnology, Fire detection, Real-time computing, Control (management), 0211 other engineering and technologies, Statistical model, 02 engineering and technology, [SPI.AUTO]Engineering Sciences [physics]/Automatic, 020901 industrial engineering & automation, Geography, Software deployment, Trajectory, State (computer science), Simulation, 021101 geological & geomatics engineering
Abstract

International audience; Efficient localization of forest-fires based Unmanned Aerial Vehicles (UAVs) represents valuable assessment. Due to the fast deployment of UAVs, it is practical to use them. For forest fire detection purposes, usually the area to explore is unknown, thus existing strategies use an automatic coverage exploration strategy. However, such approach is not efficient in terms of exploration time since the mission execution and achievement in an unknown environment that needs a strong vehicle decision and control. Based on this observation, we improved the localization mission by a decision-based strategy resulting from a probabilistic model based on the temperature in order to estimate the distance towards the forest-fire. The UAV optimizes its trajectory according to the state of the forest-fire knowledge by using a map to represent its knowledge and updates it at each step of its exploration. We show in this paper that our planning and control methodology for forest-fire localization is efficient. Simulation results are carried out to evaluate the proposed methodology and approves our claim.

Published
2015

32. Human multidrug-resistant Mycobacterium bovis infection in Mexico

Author

Armando Martinez-Guarneros, Gabriela A. Gonzalez-Macal, Jorge A. Gonzalez-y-Merchand, David Couvin, Nalin Rastogi, Gilberto Vaughan, Alejandro Escobar-Gutiérrez, Carlos A. Vazquez-Chacon, Sandra Rivera-Gutierrez, Raquel Muñiz-Salazar, Juan J. De-la-Cruz López, Livia Maria Gonçalves Rossi, Adriana Gomez-Bustamante, Escuela Nacional de Ciencias Bilogicas, Instituto Politecnico Nacional [Mexico] (IPN), Instituto de Diagnóstico y Referencia Epidemiológicos, Secretaría de Salud, Mexico city, Unité de la Tuberculose et des Mycobactéries - WHO Supranational TB Reference Laboratory, Institut Pasteur de la Guadeloupe, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Organisation Mondiale de la Santé / World Health Organization Office (OMS / WHO), Laboratorio Estatal de Salud Pública, Secretaría de Salud, Chiapas, Centro Mesoamericano de Estudios en Salud Pública y Desastres, Escuela de Ciencias de la Salud, Universidad Autónoma de Baja California (UABC), and This work was partially supported by CONACYT-SALUD-2010-C01-139579 and as part of the 7th Framework Program, European Commission, contract No. HEALTH-F3-2008-200999, and by grants CB-2010-156347, CONACYT and SIP20140970, IPN, Mexico.

Subjects
Microbiology (medical), Tuberculosis, Genotype, Immunology, Antitubercular Agents, Drug resistance, Microbial Sensitivity Tests, Minisatellite Repeats, Microbiology, 03 medical and health sciences, Phylogenetics, Predictive Value of Tests, Drug Resistance, Multiple, Bacterial, Databases, Genetic, Tuberculosis, Multidrug-Resistant, medicine, Humans, Genetic variability, Mexico, Tuberculosis, Pulmonary, Phylogeny, 030304 developmental biology, 0303 health sciences, Mycobacterium bovis, biology, 030306 microbiology, Sputum, biology.organism_classification, medicine.disease, Virology, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, 3. Good health, Multiple drug resistance, Infectious Diseases, Phenotype, Molecular Diagnostic Techniques, Mutation, medicine.symptom
Abstract

International audience; Here, we describe the molecular characterization of six human Mycobacterium bovis clinical isolates, including three multidrug resistant (MDR) strains, collected in Mexico through the National Survey on Tuberculosis Drug Resistance (ENTB-2008), a nationally representative survey conducted during 2008-2009 in nine states with a stratified cluster sampling design. The genetic background of bovine M. bovis strains identified in three different states of Mexico was studied in parallel to assess molecular relatedness of bovine and human strains. Additionally, resistance to first and second line anti-tuberculosis (TB) drugs and molecular identification of mutations conferring drug resistance was also performed. All strains were characterized by spoligotyping and 24-loci MIRU-VNTRs, and analyzed using the SITVIT2 (n = 112,000 strains) and SITVITBovis (n = 25,000 strains) proprietary databases of Institut Pasteur de la Guadeloupe. Furthermore, data from this study (n = 55 isolates), were also compared with genotypes recorded for M. bovis from USA (n = 203), Argentina (n = 726), as well as other isolates from Mexico (independent from the present study; n = 147), to determine any evidence for genetic relatedness between circulating M. bovis strains. The results showed that all human M. bovis cases were not genetically related between them or to any bovine strain. Interestingly, a high degree of genetic variability was observed among bovine strains. Several autochthonous and presumably imported strains were identified. The emergence of drug-resistant M. bovis is an important public health problem that jeopardizes the success of TB control programs in the region.

Published
2015

33. Deciphering the GPER/GPR30-agonist and antagonists interactions using molecular modeling studies, molecular dynamics, and docking simulations

Author

José Correa-Basurto, Rachid C. Maroun, Manuel Jonathan Fragoso-Vázquez, David Méndez-Luna, Marlet Martínez-Archundia, G. Ceballos-Reyes, Daphne E. González-Juárez, Instituto Politecnico Nacional [Mexico] (IPN), Structure et activité des biomolécules normales et pathologiques (SABNP), and Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Agonist, GPR30, Molecular model, medicine.drug_class, [SDV]Life Sciences [q-bio], Amino Acid Motifs, Molecular Sequence Data, Estrogen receptor, Molecular Dynamics Simulation, Bioinformatics, Ligands, Protein Structure, Secondary, Receptors, G-Protein-Coupled, Molecular dynamics, Structural Biology, medicine, Humans, GPR30 docking, ligand recognition, Benzodioxoles, Receptor, Molecular Biology, Fulvestrant, ComputingMilieux_MISCELLANEOUS, Binding Sites, Estradiol, Chemistry, Hydrogen Bonding, General Medicine, molecular dynamics simulations, Transmembrane protein, Cell biology, Protein Structure, Tertiary, Molecular Docking Simulation, Tamoxifen, Receptors, Estrogen, Docking (molecular), Quinolines, Thermodynamics, GPER, Protein Binding
Abstract

The G-protein coupled estrogen receptor 1 GPER/GPR30 is a transmembrane seven-helix (7TM) receptor involved in the growth and proliferation of breast cancer. Due to the absence of a crystal structure of GPER/GPR30, in this work, molecular modeling studies have been carried out to build a three-dimensional structure, which was subsequently refined by molecular dynamics (MD) simulations (up to 120 ns). Furthermore, we explored GPER/GPR30’s molecular recognition properties by using reported agonist ligands (G1, estradiol (E2), tamoxifen, and fulvestrant) and the antagonist ligands (G15 and G36) in subsequent docking studies. Our results identified the E2 binding site on GPER/GPR30, as well as other receptor cavities for accepting large volume ligands, through GPER/GPR30 π–π, hydrophobic, and hydrogen bond interactions. Snapshots of the MD trajectory at 14 and 70 ns showed almost identical binding motifs for G1 and G15. It was also observed that C107 interacts with the acetyl oxygen of G1 (at 14 ns) and that at 70 ns the residue E275 interacts with the acetyl group and with the oxygen from the other agonist whereas the isopropyl group of G36 is oriented toward Met141, suggesting that both C107 and E275 could be involved in the protein activation. This contribution suggest that GPER1 has great structural changes which explain its great capacity to accept diverse ligands, and also, the same ligand could be recognized in different binding pose according to GPER structural conformations.

Published
2015
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34. Trehalose accumulation in Saccharomyces cerevisiae cells: experimental data and structured modeling

Author

Patricia Taillandier, Edgar Salgado, Juan Aranda, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Instituto Politécnico Nacional - IPN (MEXICO), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Laboratoire de Génie Chimique - LGC (Toulouse, France), Instituto Politecnico Nacional [Mexico] (IPN), Laboratoire de génie chimique [ancien site de Basso-Cambo] (LGC), 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, and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)

Subjects
Environmental Engineering, Saccharomyces cerevisiae, Biomedical Engineering, Disaccharide, Biomass, Yeast cells, Bioengineering, 03 medical and health sciences, chemistry.chemical_compound, [CHIM.GENI]Chemical Sciences/Chemical engineering, Biosynthesis, Génie chimique, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Structured model, Génie des procédés, 030304 developmental biology, 2. Zero hunger, Wine, 0303 health sciences, biology, 030306 microbiology, food and beverages, Disaccharide trehalose, biology.organism_classification, Trehalose, Yeast, chemistry, Biochemistry, Biotechnology
Abstract

International audience; Several studies have shown that the reserve disaccharide trehalose also protects yeast cells under environmental stress. Besides, it is acknowledged that trehalose improves yeast viability so its synthesis has become paramount in baker’s yeast industry, as well as in wine and beer production. In this work, starving carbon or nitrogen conditions were imposed to Saccharomyces cerevisiae growing in fed-batch cultivations in order to induce biosynthesis and accumulation of trehalose. Our experimental results show that yeast can accumulate trehalose up to 13% of biomass dry weight (0.13 gtrehalose g^−1biomass) under carbon or nitrogen starvation. A compartmentalized and biochemically structured model is proposed in order to mathematically describe these experimental findings. The model predictions were compared with literature results obtained under growth conditions different from those established in our experiments, resulting in a very good agreement and thus indicating that the proposed hypotheses are essentially correct.

Published
2004

35. Methods of Micropatterning and Manipulation of Cells for Biomedical Applications

Author

Etienne Dague, Sergio Proa-Coronado, Childérick Séverac, Adrian Martinez-Rivas, Génesis Karendash González-Quijano, Instituto Politecnico Nacional [Mexico] (IPN), Institut des Technologies Avancées en sciences du Vivant (ITAV), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Équipe Ingénierie pour les sciences du vivant (LAAS-ELIA), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), 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-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)

Subjects
0301 basic medicine, micro-nanofabrication, mammalian and bacterial cells, Computer science, lcsh:Mechanical engineering and machinery, Microfluidics, microfluidics, organs-on-chips (OOC), soft lithography, Nanotechnology, Review, 02 engineering and technology, 03 medical and health sciences, Tissue engineering, Point of care poc, lcsh:TJ1-1570, Electrical and Electronic Engineering, cell patterning and manipulation, Biological studies, business.industry, Mechanical Engineering, In vitro toxicology, 021001 nanoscience & nanotechnology, Cell patterning, 3. Good health, [SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics, 030104 developmental biology, point-of-care (POC), Control and Systems Engineering, Personalized medicine, biomedical microelectromechanical systems (bioMEMS), 0210 nano-technology, business, Micropatterning
Abstract

International audience; Micropatterning and manipulation of mammalian and bacterial cells are important in biomedical studies to perform in vitro assays and to evaluate biochemical processes accurately, establishing the basis for implementing biomedical microelectromechanical systems (bioMEMS), point-of-care (POC) devices, or organs-on-chips (OOC), which impact on neurological, oncological, dermatologic, or tissue engineering issues as part of personalized medicine. Cell patterning represents a crucial step in fundamental and applied biological studies in vitro, hence today there are a myriad of materials and techniques that allow one to immobilize and manipulate cells, imitating the 3D in vivo milieu. This review focuses on current physical cell patterning, plus chemical and a combination of them both that utilizes different materials and cutting-edge micro-nanofabrication methodologies.

Published
2017

36. Permeabilization of the Mitochondrial Inner Membrane by Short Cecropin-A-Melittin Hybrid Peptides

Author

Susana Prieto, § Pilar Díaz-Achirica, David Andreu, Luis Rivas, Josep Ubach, Eduardo Rial, Centre National de la Recherche Scientifique (CNRS), Department of Cellular and Molecular Medicine, Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)- Centro de Investigaciones Biológicas (CIB), ESCA Santo Tomas (ESCA), and Instituto Politecnico Nacional [Mexico] (IPN)

Subjects
Cecropin A, [SDV]Life Sciences [q-bio], Recombinant Fusion Proteins, Detergents, Molecular Sequence Data, Mitochondria, Liver, Peptide, Mitochondrion, Biology, Inhibitory postsynaptic potential, Biochemistry, Permeability, Melittin, 03 medical and health sciences, chemistry.chemical_compound, Oxygen Consumption, 0302 clinical medicine, Animals, Amino Acid Sequence, Inner mitochondrial membrane, ComputingMilieux_MISCELLANEOUS, Volume concentration, 030304 developmental biology, chemistry.chemical_classification, High concentration, 0303 health sciences, Dose-Response Relationship, Drug, Heparin, Intracellular Membranes, Melitten, Anti-Bacterial Agents, Rats, chemistry, 030217 neurology & neurosurgery, Antimicrobial Cationic Peptides
Abstract

A number of cecropin-A-melittin hybrid peptides have previously been shown to be potent antibacterial agents [Andreu, D., Ubach, J., Boman, A., Wahlin, B., Wade, D., Merrifield, R. B. & Boman, H. G. (1992) FEBS Lett. 296, 190-1941. In the present report we analyze their action on biological systems using rat liver mitochondria as a test system. We demonstrate that the longest peptide, cecropin-A-( 1 - 8) -melittin(l - 18) permeabilizes the mitochondrial inner membrane allowing the movement of both charged and non-charged solutes. Concentrations used have already been shown to be bactericidal. This effect is also demonstrated under respiring conditions where succinate oxidation is uncoupled. Shorter analogs also permeabilize mitochondria although at ten-fold higher concentrations. Heparin potentiates the peptide effects at low concentrations, while at high concentration it becomes inhibitory. We propose that the cecropin-melittin analogs disrupt the mitochondrial membrane in a detergent-like mode rather than by creating selective channels as had been previously suggested.

Published
1994

37. Visual attention using spiking neural maps

Author

Roberto A. Vázquez, Bernard Girau, Jean-Charles Quinton, Centro de Investigación en Computación (CIC-IPN), Instituto Politecnico Nacional [Mexico] (IPN), Neuromimetic intelligence (CORTEX), INRIA Lorraine, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Lorrain de Recherche en Informatique et ses Applications (LORIA), Institut National de Recherche en Informatique et en Automatique (Inria)-Université Henri Poincaré - Nancy 1 (UHP)-Université Nancy 2-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS)-Université Henri Poincaré - Nancy 1 (UHP)-Université Nancy 2-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), and Ali Minai, Hava Siegelmann

Subjects
Spiking neural network, Quantitative Biology::Neurons and Cognition, Artificial neural network, Computer science, business.industry, [SCCO.COMP]Cognitive science/Computer science, Biological neuron model, Pattern recognition, 02 engineering and technology, Stimulus (physiology), 03 medical and health sciences, 0302 clinical medicine, 0202 electrical engineering, electronic engineering, information engineering, Visual attention, 020201 artificial intelligence & image processing, Artificial intelligence, business, 030217 neurology & neurosurgery
Abstract

International audience; Visual attention is a mechanism that biological systems have developed to reduce the large amount of visual information in order to efficiently perform tasks such as learning, recognition, tracking, etc. In this paper we describe a simple spiking neural network model that is able to detect, focus on and track a stimulus even in the presence of noise or distracters. Instead of using a regular rate-coding neuron model based on the continuum neural field theory (CNFT), we propose to use a time-based code by means of a network composed of leaky integrate-and-fire (LIF) neurons. The proposal is experimentally compared against the usual CNFT-based model.

Published
2011

38. Acid natural clinoptilolite: structural properties against adsorption/separation of n-paraffins

Author

Giselle Autié-Castro, Tania Farías, Miguel A. Autie-Pérez, A. Rivera, J.L. Contreras, Louis Charles de Ménorval, Hernany Yee-Madeira, Zeolites Engineering Laboratory, University of Havana (Universidad de la Habana) (UH), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Departamento de Física (ESFM), and Instituto Politecnico Nacional [Mexico] (IPN)

Subjects
Surface Properties, 02 engineering and technology, 010402 general chemistry, Molecular sieve, 01 natural sciences, Separation, Biomaterials, Colloid and Surface Chemistry, Adsorption, n-Paraffins, Acid treatment, Inverse gas chromatography, Natural clinoptilolite, Zeolite, Clinoptilolite, Chromatography, Molecular Structure, Chemistry, Chemistry, Physical, [CHIM.MATE]Chemical Sciences/Material chemistry, Microporous material, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Dilution, Chemical engineering, Paraffin, Zeolites, Gas chromatography, 0210 nano-technology
Abstract

International audience; The employment of an acid natural clinoptilolite (AZH-1) in the adsorption and separation of n-paraffins has been evaluated. Natural clinoptilolite, NZ, was the raw material used to prepare the sodiumexchanged clinoptilolite (AZ) starting from which the AZH-1 sample was obtained by acid treatment. The structural stability of the samples after the applied treatments was demonstrated. The nitrogen adsorption experiments indicated that the acid sample has a homogeneous porous distribution and a considerable increase in the micropore volume with respect to NZ and AZ. The employment of the inverse gas chromatography at infinite dilution (IGCID) allowed studying the adsorption and separation of n-paraffin mixtures on AZH-1. It was also confirmed that the diffusion on AZH-1 took place in an unblocked structure through the A channel of ten members with minimal interactions. The IGCID results demonstrated the capacities of the acid Cuban natural zeolite in the adsorption and separation of n-paraffin mixtures.

Published
2011

39. E-SIME - A method for transient stability closed-loop emergency control: achievements and prospects

Author

Damien Ernst, Daniel Ruiz-Vega, Mevludin Glavic, Louis Wehenkel, Mania Pavella, Department of Electrical Engineering and Computer Science (Institut Montefiore), Université de Liège, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Instituto Politechnico National (IPN), Instituto Politecnico Nacional [Mexico] (IPN), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)

Subjects
Coupling, Engineering, business.industry, 020209 energy, 020208 electrical & electronic engineering, Stability (learning theory), Phasor, Control engineering, 02 engineering and technology, Units of measurement, Electric power system, Control theory, Emergency control, 0202 electrical engineering, electronic engineering, information engineering, Transient (oscillation), business, Closed loop, ComputingMilieux_MISCELLANEOUS
Abstract

A general response-based technique is presented for closed-loop transient stability emergency control. It relies on E-SIME, derived from the hybrid transient stability method, SIME. E-SIME uses real-time information supposed to be furnished by phasor measurement units to predict the stability status of the power system, and, in view of an imminent instability, to design and trigger appropriate countermeasures, while continuing monitoring in order to check their effectiveness or to apply additional ones. Performance of the method in terms of accuracy and rapidity is scrutinized and illustrated on several real-world power system examples. New technical solutions and algorithms for the accurate estimation and prediction of power system quantities most relevant to the method are discussed. The observations from a recent investigation and conclusions that could prove useful for improving further the method are summarized together with some realistic timing considerations. A natural coupling of the two SIME based emergency control techniques: open-loop emergency control and E-SIME, so as to combine their complementary features is also discussed.

Published
2007

40. Cloning, bacterial expression, purification and structural characterization of N-terminal-repetitive domain of gamma-Gliadin

Author

Hélène Rogniaux, Jacques Guéguen, Claudia G. Benitez-Cardoza, Yves Popineau, Instituto Politecnico Nacional [Mexico] (IPN), Unité de recherche sur les Biopolymères, Interactions Assemblages (BIA), and Institut National de la Recherche Agronomique (INRA)

Subjects
Circular dichroism, Protein Conformation, Recombinant Fusion Proteins, Protein domain, Gene Expression, medicine.disease_cause, Cleavage (embryo), GAMMA GLIADIN, Gliadin, medicine, Escherichia coli, Denaturation (biochemistry), Cloning, Molecular, Protein secondary structure, Chromatography, High Pressure Liquid, Chemistry, Circular Dichroism, Fusion protein, [SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biomolecules [q-bio.BM], Protein Structure, Tertiary, Crystallography, THIOREDOXIN, REPETITIVE DOMAIN, Thioredoxin, WHEAT STORAGE PROTEINS, Biotechnology
Abstract

The gene encoding the repetitive domain located in the N-terminal half of [gamma]-Gliadin from wheat endosperm has been subcloned into a thioredoxin expression system (pET102/D-Topo). It was over-expressed as fusion protein with thioredoxin in Escherichia coli. Thioredoxin was removed by enterokinase cleavage or by acid cleavage at the respective engineered recognition sites. The soluble N-terminal half of [gamma]-Gliadin was purified by affinity and reverse-phase chromatography. While, the enterokinase cleavage leaded to only one species detectable by mass spectroscopy, the acid cleavage resulted in a three different length polypetides, due to the presence of the same number of acid cleavage sites. The secondary structure of the purified protein domain was analysed by circular dichroism, showing an spectral shape common to a Poly(Pro) II conformation. The spectrum is dominated by a large negative peak centred around 201 nm and a broad shoulder centred around 225 nm. Also, the temperature denaturation process was studied. The differences observed in the spectra show two main tendencies, the increment of the shoulder intensity, and the drop of the intensity of the peak around 201. When the sample was cooled down, the change on intensity of the shoulder around 225 was completely reversible and that around the 201 nm peak reached a reversibility of 90%. Such structure and thermal behaviour are characteristic of the repetitive domains of the wheat prolamins.

Published
2005

41. The essential importance of experimental research and the use of experimental thermodynamics to the benefit of industry

Author

Luis A. Galicia-Luna, Dominique Richon, Christophe Coquelet, Amir H. Mohammadi, CEP/Fontainebleau, Centre Énergétique et Procédés (CEP), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Laboratorio de Termodinamica-Graduados-ESIQIE, and Instituto Politecnico Nacional [Mexico] (IPN)

Subjects
Experimental thermodynamic properties, Round table, Chemistry, Model validation, General Chemical Engineering, General Physics and Astronomy, Thermodynamics, 02 engineering and technology, 021001 nanoscience & nanotechnology, Experimental research, 020401 chemical engineering, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, 0204 chemical engineering, Physical and Theoretical Chemistry, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Kwazulu natal
Abstract

J. Fernandez (University of Santiago de Compostela, Spain), . Gmehling (University of Oldenburg, Germany), H. Inomata Tohoku University, Japan), J.N. Jaubert (INPL, France), T.W. de oos (Delft University, The Netherlands), J.P. O’Connell (Univerity of Virginia, USA), C. Peters (Delft University, The Netherlands), . Ramjugernath (KwaZulu Natal University, South Africa), F. del io (Universidad Autonoma Metropolitana, Mexico), G. Scalabrin Padova University, Italy), K. Tochigi (Nihon University, Japan)

Published
2010

42. A Novel Experimental Model and a Drag-optimal Allocation Method for Variable-Pitch Propellers in Multirotors

Author

Antonio Franchi, Victor Manuel Arellano-Quintana, E.A. Merchán-Cruz, Instituto Politecnico Nacional [Mexico] (IPN), Équipe Robotique et InteractionS (LAAS-RIS), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), European Project: 644271,H2020,H2020-ICT-2014-1,AEROARMS(2015), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), 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-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées

Subjects
0209 industrial biotechnology, General Computer Science, Computer science, Aerial vehicles, 020209 energy, Thrust, 02 engineering and technology, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], 020901 industrial engineering & automation, Control theory, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, 0202 electrical engineering, electronic engineering, information engineering, [INFO.INFO-RB]Computer Science [cs]/Robotics [cs.RO], General Materials Science, systems identification, variable-pitch propellers, multirotors, Angle of attack, General Engineering, Propeller, Rotational speed, Aerodynamics, [SPI.TRON]Engineering Sciences [physics]/Electronics, Moment (mathematics), Drag, lcsh:Electrical engineering. Electronics. Nuclear engineering, lcsh:TK1-9971
Abstract

International audience; This paper proposes a new mathematical model to map the rotational speed and angle ofattack (pitch) of small-size propellers typically used in multirotors and the aerodynamic thrust force anddrag moment produced by the propeller itself. The new model is inspired by standard models using theblade-element and momentum theories, which have been suitably modified in order to allow for explicit fastcomputation of the direct and inverse map (useful for high-frequency control) and obtain a better adherence toexperimental data. The new model allows and captures all the main nonlinear characteristics of the thrust/draggeneration. An extensive experimental comparison shows that the prediction capability of the proposedmodel outperforms the most commonly used models at date. In the second part of the paper, two optimizationmethods are proposed in order to exploit the redundancy of the inputs of variable-pitch propellers to decreasethe power consumption due to the drag dissipation. The first method deals with the optimal allocation forthrust generation on a single propeller, while the second method is aimed at solving the optimal allocation ofthe rotational speed and pitch of all the propellers in a multi-rotor with any number of propellers. Simulationsresults show the viability and effectiveness of the proposed methods

43. Blood Glucose Regulation in Patients with Type 1 Diabetes Mellitus: A Robust MRAC Approach

Author

Roberto Franco, Héctor Ríos, Alejandra Ferreira de Loza, Denis Efimov, Louis Cassany, David Gucik-Derigny, Jérôme Cieslak, David Henry, Tecnológico Nacional de México (TecNM), Instituto Politecnico Nacional [Mexico] (IPN), Consejo Nacional de Ciencia y Tecnología [Mexico] (CONACYT), Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), ECOSNord M18M01 and SEP-CONACYT-ECOS-ANUIES 296692., ANR-18-CE17-0005,DIABLO,Capteurs bio-électroniques intégrant l'algorithme des îlots pour le contrôle de la glycémie en boucle ouverte et fermée(2018), and Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)

Subjects
Blood glucose regulation, Adaptive Control, Diabetes mellitus type 1, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering
Abstract

International audience; This paper deals with the problem of robust bloodglucose regulation in critically ill patients affected by type 1diabetes mellitus. The blood glucose measurement and insulininfusion are intravenous. The proposed algorithm regulatesblood glucose and keeps it in the normoglycemia range, i.e.,70–180 mg/dl. To this aim, a control law is proposed based ona Nonlinear Model Reference Adaptive Control approach. Thealgorithm is composed of nonlinear adaptive gains that ensureconvergence to zero of the regulation error.The approach is validated in the UVA/Padova metabolicsimulator for ten in silico adult patients with unannouncedmeals.

44. On the observability and detectability of non-commensurate time-delay linear systems

Author

Rosane Ushirobira, Francisco Javier Bejarano, Gang Zheng, Escuela Superior de Ingeniería Mecánica y Eléctrica - Unidad Profesional Ticomán (ESIME-UPT), Instituto Politecnico Nacional [Mexico] (IPN), Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Deformable Robots Simulation Team (DEFROST )

Subjects
0209 industrial biotechnology, Computer science, 010102 general mathematics, Linear system, Observable, 02 engineering and technology, 01 natural sciences, Unobservable, 020901 industrial engineering & automation, Control theory, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, sort, Observability, 0101 mathematics
Abstract

International audience; We tackle the observability and detectability problems of a sort of non-commensurate time-delayed linear systems. We give some conditions under which the system can be put into an observability form, that is the system is decomposed into what we call its observable and unobservable parts. Based on concrete definitions of observability and detectability, we use the observability form to derive observability and detectability conditions.

45. La sélection de l'outil comme déclencheur d'apprentissages

Author

Igor Rivera, Bernard Penz, Dominique Vinck, UPIICSA, Instituto Politecnico Nacional [Mexico] (IPN), Recherche Opérationnelle pour les Systèmes de Production (G-SCOP_ROSP), Laboratoire des sciences pour la conception, l'optimisation et la production (G-SCOP), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Pacte, Laboratoire de sciences sociales (PACTE), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Sciences Po Grenoble - Institut d'études politiques de Grenoble (IEPG)-Centre National de la Recherche Scientifique (CNRS), D.Vinck, B.Penz, and Vinck, Dominique

Subjects
[SHS.SOCIO]Humanities and Social Sciences/Sociology, [SHS.SOCIO] Humanities and Social Sciences/Sociology

46. Control of delayed recycling systems with an unstable pole at forward path

Author

J. F. Marquez Rubio, Olivier Sename, B. del Muro Cuellar, Sename, Olivier, Instituto Politecnico Nacional [Mexico] (IPN), GIPSA - Systèmes linéaires et robustesse (GIPSA-SLR), Département Automatique (GIPSA-DA), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), and Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)

Subjects
0209 industrial biotechnology, Engineering, Signal processing, business.industry, PID controller, Pole–zero plot, Uncertain systems, Control engineering, 02 engineering and technology, Transfer function, [SPI.AUTO]Engineering Sciences [physics]/Automatic, 020901 industrial engineering & automation, [SPI.AUTO] Engineering Sciences [physics]/Automatic, 020401 chemical engineering, Control theory, Robustness (computer science), Process control, Feedback controller, 0204 chemical engineering, business
Abstract

International audience; Unstable time delay system and recycling system pose a challenge problem in their own. When unstable time delay system have recycle the control problem becomes even more difficult. A control methodology for these systems is proposed in this paper. The strategy is based on the observation that if some internal system were available, then it would be possible to decouple the backward dynamics and then a feedback controller could be designed for the forward dynamics. The key for this strategy to be carried out is the asymptotic observerpredictor proposed to estimate the required internal signals. Necessary and sufficient conditions to assure convergence of this observer are given. Then, the strategy is complemented by using a PID controller with two degree of freedom in order to track step input references. Robustness to delay uncertainty is also discussed.

47. Fault Compensability Criteria with Application to a Rendezvous Mission Around Mars

Author

Jazmìn Zenteno Torres, Jérôme Cieslak, David Henry, Jorge Davila, Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Instituto Politecnico Nacional [Mexico] (IPN), and Cieslak, Jérome

Subjects
[INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, [INFO.INFO-AU] Computer Science [cs]/Automatic Control Engineering, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

48. A Tracking Backstepping Sliding Mode Control for Spacecraft Rendezvous with a Passive Target

Author

Jazmìn Zenteno Torres, Jérome Cieslak, David Henry, Jorge Davila, Laboratoire de l'intégration, du matériau au système (IMS), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université Sciences et Technologies - Bordeaux 1, Instituto Politecnico Nacional [Mexico] (IPN), CONACyT under grant 440473, IEEE, and Cieslak, Jérome

Subjects
[INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, [INFO.INFO-AU] Computer Science [cs]/Automatic Control Engineering
Abstract

International audience; This paper addresses the design of sliding mode control (SMC) laws for a chaser spacecraft for a rendezvous mission on a circular orbit around Earth. The controllers for attitude and translational motions are based on SMC combined with state feedback linearization in a backstepping setup. Simulations from a high-fidelity benchmark reveal promising results

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