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Knot invariants from XC-structures on the Sweedler algebra are trivial
No full textAn XC-algebra is the minimum algebraic structure needed to define a framed, oriented knot invariant and generalises Lawrence's invariant obtained from ribbon Hopf algebras. In this note, we show that the knot invariant produced by any XC-structure on the Sweedler algebra is completely determined by the framing of the knot. Furthermore, we also exhibit explicit families of XC-structures on the Sweedler algebra that do not have a ribbon Hopf-algebraic origin
Co-produire des connaissances et des outils pour des démarches préventives et opérationnelles en gestion agroécologique des adventices Partie I. Acquisition de données et synthèse dans des outils numériques
No full textAccompagner l’évolution des systèmes agricoles vers une moindre dépendance aux produits phytopharmaceutiques en se concentrant sur les méthodes préventives et sur les évaluations élargies des pratiques de protection des cultures et en les appréciant à travers leur durabilité. Dans ce numéro, nous abordons la conception d’outils et de stratégies de prévention, le développement de méthodes de lutte non chimique contre différents ravageurs et pathogènes, ainsi que l’évaluation, la définition d’indicateurs, la diffusion et la structuration de pratiques, depuis l’échelle de la parcelle jusqu’à celle des territoires et des filières. Ces projets ont été financés dans le cadre des appels à projets Ecophyto Recherche & Innovation lancés en 2019 : - Les approches globales pour limiter l’utilisation des produits phytopharmaceutiques - Durabilité des systèmes de productions agricoles alternatifs évitant ou limitant l’utilisation des produits phytopharmaceutiques"National audienceLe projet COPRAA visait à produire avec des acteurs de terrain des connaissances, outils et démarches de gestion préventive opérationnelles pour les conseillers et agriculteurs afin de concilier production agricole, rentabilité économique, biodiversité et faible usage, voire absence, d'herbicides en grande culture. Cet article présente (1) la production de connaissances sur les processus biophysiques déterminant les effets des techniques culturales et les régulations biologiques des adventices, avec des expérimentations en conditions contrôlées et au champ, puis (2) la synthèse de ces connaissances dans différents outils numériques (FLORSYS, DECIFLORSYS, OPTIFLORSYS, OdERA). L'évaluation et la conception d'idéotypes variétaux et systèmes de culture sera présentée dans la partie II de cet article
A Digital Twins Framework for Managing Building Environmental Parameters
No full textInternational audienc
Quantum dot-enhanced Co3O4/TiO2 type-II heterojunction chemiresistor for efficient 3-octanone monitoring in wheat mildew identification
No full textInternational audienc
Évaluation de points d'intérêt en vision omnidirectionnelle avec une séquence fisheye photoréaliste : Un compte rendu d'expérimentations faites en 2014
No full textWhat is this report:This is a scientific report, contributing with a detailed bibliography, a dataset which we will call now PFSeq for "Photorealistic Fisheye Sequence" and make available at https://doi.org/10.57745/DYIVVU, and comprehensive experiments. This work should be considered as a draft, and has been done during my PhD thesis "Construction of 3D models from fisheye video data-Application to the localisation in urban area" in 2014 [Mor16]. These results have never been published. The aim was to find the best features detector and descriptor for fisheye images, in the context of selfcalibration, with cameras mounted on the top of a car and aiming at the zenith (to proceed then fisheye visual odometry and stereovision in urban scenes). We face a chicken and egg problem, because we can not take advantage of an accurate projection model for an optimal features detection and description, and we rightly need good features to perform the calibration (i.e. to compute the accurate projection model of the camera). What is not this report:It does not contribute with new features algorithm. It does not compare standard features algorithms to algorithms designed for omnidirectional images (unfortunately). It has not been peer-reviewed. Discussions have been translated and enhanced but the experiments have not been run again and the report has not been updated accordingly to the evolution of the state-of-the-art (read this as a 2014 report).</div
L'étendue du contrôle de la compétence du tribunal arbitral par le juge du recours en annulation
No full textInternational audience(Paris, 19 nov. 2024, no 22/03426, X. c/ République du Pérou
Cobalamin-mediated protection of Faecalibacterium duncaniae against oxidative stress: Insights from proteomic and membrane fatty acid profiles
No full textInternational audienceFaecalibacterium species are keystone commensals of the human gut, contributing to intestinal homeostasis, immune modulation, and epithelial health. However, their extreme sensitivity to oxygen and reactive oxygen species renders them highly vulnerable during inflammatory conditions, severely limiting their therapeutic application. Understanding the molecular mechanisms underlying their oxidative stress responses is therefore critical for harnessing these bacteria as next-generation probiotics to restore gut health. In this study, we investigated oxidative stress responses in Faecalibacterium duncaniae A2–165 using comprehensive proteomic and membrane fatty acid profiling. We demonstrated that increasing hydrogen peroxide (H₂O₂) concentrations extend the lag phase of growth and affect survival during the first hour of exposure, notably altering the redox potential. Exposure to H₂O₂ triggered a remodeling of the proteome, including detoxification systems, metal transporters, DNA repair systems, transcriptional regulators, and enzymes involved in cobalamin biosynthesis. Complementary RT-qPCR analyses revealed coordinated and time-dependent transcriptional activation of genes involved in oxidative stress response. Remarkably, cobalamin supplementation enhanced bacterial growth, mitigated H₂O₂-induced stress, and lowered superoxide levels in F. duncaniae, highlighting its direct antioxidant activity. By analyzing membrane fatty acid profiles, we showed that cobalamin preserves membrane fluidity, counteracting oxidative stress induced by H₂O₂ in F. duncaniae. These findings reveal the multifaceted strategies employed by F. duncaniae to withstand oxidative stress and provide a foundation for future efforts to optimize its production at industrial scales and its therapeutic potential as a next-generation probiotic
Que fait la littérature russe au réalisme magique ? Formes et enjeux du recours au surnaturel dans la prose russe contemporaine
No full textInternational audienc
Sweetness exposure modulates brain networks in children responding to sucrose solutions: a functional MRI study
No full textInternational audienceContextChildhood obesity is a pervasive health issue, with sugar consumption implicated not only in its development but also in adverse effects on brain health. While extensive research has explored adult brain processes in response to sweet taste, there is limited understanding of how children's brains activate in similar, contexts.MethodIn this study, 34 children aged 8-12 undent food frequency and sweetness liking assessments before participating in a functional magnetic resonance imaging (fMRI) scan during a gustatory paradigm involving varying sweetness levels. Utilizing independent component analysis (ICA), we examined functional networks engaged during sweet taste perception and after swallowing.ResultsOur study identified distinct brain networks for tasting, swallowing, and a transitional stage linking the two. Children with lower BMI and higher sugar intake showed greater activation in the transition network, suggesting enhanced interoceptive sensitivity.ConclusionThis novel investigation provides a foundational understanding of how sweetness exposure modulates brain networks in children responding to sucrose solutions, offering valuable insights into the interplay between sugar consumption, childhood obesity, and neural responses
Modeling and analysis of high-resolution H<sub>2</sub><sup>12</sup>CO spectra in the range 4450-5000 cm<sup>-1</sup>
No full textInternational audienceThis study presents modeling and analysis of the line positions and intensities of H₂CO in the 4450-5000 cm⁻¹ spectral region, recorded at a low temperature (160-166 K) at various pressures using a high-resolution Fourier transform spectrometer. The calculations are based on a series of numerical block-diagonalization procedures applied to the nuclear-motion Hamiltonian, which was constructed from our ab initio potential energy and dipole moment surfaces, resulting in a new effective model for successive rovibrational polyads. Over 4600 assigned transitions were included in the empirical optimization of the model parameters using observed line positions. The fitting process for line intensities involved about 3300 transitions. The root-meansquare (RMS) deviation for line positions in the studied range is 0.00094 cm-1, while the RMS deviation for the line intensities is 10.18%. New theoretical predictions for the isotopic species H213C16O, H212C18O, for the band origins are reported. The improved line list contains 25725 transitions, including both experimentally measured and calculated lines. Validations of the new list are discussed, using comparisons of the transmittance simulation versus our high-resolution experimental spectra at T = 160-166 K and of cross-section simulations at T = 296 K versus medium-resolution PNNL observations