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D’un anniversaire à l’autre. Que reste-t-il de ‘Mai 68’ chez les socialistes français ? (1978-2008)
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Structural insights into nanofibers formed by templated polymerization-induced self-assembly through combined SANS and AFM characterizations
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What a peaty contribution to global warming! An interdisciplinary study of atmospheric and hydrologic carbon fluxes in a temperate peatland in the Jura Mountains, eastern France
No full textInternational audiencePeatlands, though covering only 3 % of the global land surface, play an active role in the Critical Zone (CZ) by mediating substantial water and carbon exchanges with adjacent aquifers, surface waters, and the atmosphere. These ecosystems provide key services, such as carbon and water storage and local climate regulation, addressing contemporary challenges related to climate change, biodiversity loss, and water resource management. However, peatlands are increasingly threatened by global pressures, including climate change, and local disturbances, such as drainage for agriculture, forestry, and peat extraction. To mitigate these threats, it is essential to understand the hydrological, biogeochemical, and ecological processes governing peatland dynamics across spatiotemporal scales. To explore the factors controlling greenhouse gases sources, production, and transport in peatlands, an interdisciplinary field campaign was conducted at the Frasne peatland (7 ha, 46.826°N, 6.1754°E, 840 m a.s.l.), a long-term observatory since 2008. The site is part of the French CZ research infrastructure (OZCAR) and the long term ecological research site Jurassian Arc, which focuses on the interaction between human and nature. The campaign was supported by the TERRA FORMA project, which develops smart, connected, low-cost, and low-impact environmental sensors to monitor CZ trajectories in the Anthropocene. The fieldwork integrated microbiological analyses of peat material, including membrane lipid profiling to trace microbial metabolisms, combined with detailed hydrogeochemical investigations of peat pore water along lateral flow and depth gradients. Measurements included physicochemical parameters (temperature, electrical conductivity, pH) and major elements, dissolved organic and inorganic carbon (DOC and DIC), CO₂, and CH₄ concentration, as well as their isotopic characterization (δ¹⁸O, δ²H, δ¹³C) . Additionally, greenhouse gases fluxes were quantified at multiple scales, employing methods such as dissolved gas profiling, chamber measurements, eddy covariance, and UAV-based surveys. This multiscale approach aims to tackle critical challenges in peatland research and management, including three-dimensional quantification of carbon fluxes (lateral and vertical) at the ecosystem scale; characterization of hydrological, biogeochemical, and ecological processes that modulate greenhouse gases and dissolved carbon production and transport; and development of accessible and efficient tools for addressing these pressing environmental issues. three-dimensional quantification of carbon fluxes (lateral and vertical) at the ecosystem scale; characterization of hydrological, biogeochemical, and ecological processes that modulate greenhouse gases and dissolved carbon production and transport; and development of accessible and efficient tools for addressing these pressing environmental issues
Linguistica e corpora interazionali : tra interrogazione, applicazione e comparazione
No full textInternational audienceIn this talk, I will present my current research trajectories in the field of interactional corpus linguistics, focusing on three areas.Firstly, the interrogation of spoken corpora that researchers can carry out on freely available online databases in order to provide a sequential and multimodal analysis of conversational exchanges. Secondly, the exploitation of corpus studies that researchers can consider from an applied linguistics perspective (mainly for didactic purposes). Finally, comparisons of the use of certain linguistic structures that can be drawn from different corpora of spoken languages in interaction. For this last part, I will propose contributions to the comparative study of discourse markers in two Romance languages, French and Italian talk-in-interaction.Dans cette communication, je présenterai mes trajectoires de recherche actuelles dans le domaine de la linguistique de corpus d’interactions en m’appuyant sur trois axes. Premièrement, l’interrogation de corpus oraux, à partir de bases de données accessibles en ligne, pour une étude séquentielle et multimodale des échanges à l’oral. Deuxièmement, les exploitations des études de corpus que le chercheur peut envisager en s’inscrivant dans une perspective appliquée (pour des finalités didactiques, notamment). Enfin, les comparaisons de l’emploi de certaines structures linguistiques qui peuvent être proposées à partir de différents corpus de langues parlées en interaction. Pour ce dernier volet, je proposerai des contributions à l’étude comparative de marqueurs discursifs dans deux langues romanes, le français et l’italien
The Borrowing of Fictional Elements : An Easy Access to the Realms of SciFi and Fantasy?
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ELITEC : un corpus de conversations en microposts français annoté pour le liage d'entités Wikidata
No full textNational audienceNous présentons un corpus de microposts en français pour l'évaluation de la tâche de liage des mentions présentes dans le texte à des entités de Wikidata. Ce corpus est annoté à la fois pour la reconnaissance des mentions (Named Entity Recognition - NER) et leur liaison à des entités de Wikidata (Entity Linking - EL). Il s'agit d'une collection de 2 500 microposts, ciblés sur des termes liés à la vie en ville et regroupés en 618 conversations. Construit en suivant les conventions d'annotation de Impresso-Quaero, ce corpus a été pseudo-anonymisé afin d'être mis librement à disposition de la communauté. Nommé ELITEC (EL for mIcroposTs in FrEnCh), son objectif est de compléter les ressources spécifiques au français. ELITEC sert de base de tests pour les tâches NER et EL, et nous l'avons utilisé pour l'évaluation d'un système d'EL que nous avons développé
Advancements and Challenges in UAV-Based Gas Detection: A Review of Emerging Technologies
No full textInternational audienceThis literature review examines recent advancements in the use of unmanned aerial vehicles (UAVs) for atmospheric gas detection and environmental monitoring. The reviewed studies encompass a diverse range of applications, including maritime emission surveillance, industrial pollution assessment, odor mapping in wastewater facilities, and greenhouse gas plume tracking. UAVs equipped with advanced gas sensors offer high-resolution, real-time data collection capabilities in complex or hazardous environments, providing a flexible and costeffective alternative to traditional ground-based or satellite-based methods. Despite these advantages, key limitations persist, such as sensor calibration issues, environmental interferences (e.g., wind, humidity, and temperature), limited flight endurance, and UAV-induced airflow disruptions. The integration of advanced data processing algorithms, sensor fusion techniques, and optimized flight planning has been widely recommended to enhance accuracy and reliability. This review highlights the growing potential of UAV-based systems for environmental sensing and underscores the need for continued research in system robustness and operational scalability.</div
A Study on the Transition from the Convective to Absolute Instabilities in Steam Water Flows
No full textInternational audienceIn the current experimental study, investigations have been carried out on studying the transition from convective to absolute instabilities in a confined, spatially developing forward flow of steam-water two-phase flows. Experimental results aligned well for critical Reynolds numbers, gauge pressure, and wave frequencies/wavelengths. Initially, the flow was stable or minimally affected by instabilities, but it gradually became convectively unstable before transitioning to absolute instability in both axial and radial directions. Throughout the flow, oscillations at the absolute frequency modified the flow structure, even near the pipe exit approximately 3-4 cm away from the exit.</div
El tresor del Garraf, els dírhams de la cova de Can Sadurní i la primera circulació monetària islàmica a l'actual Catalunya
No full textInternational audienceA la cova de Can Sadurní de Begues han estat localitzats fins a sis dírhams del califat omeia de Damasc; a excepció d’un exemplar procedent d’Ifrīqiya, tots ells són d’origen oriental –Wāsiṭ, Iṣṭaḫr, Armènia– i van ser encunyats entre els anys 84/703-704 i 113/731-732. La composició del conjunt i diverses informacions orals que testimonien l’aparició fa dècades d’una important ocultació de monedes a la cova ens permeten establir un vincle amb el conegut com a “tresor del Garraf”, aparegut i perdut en els anys cinquanta del segle XX. Així mateix, a partir de l’anàlisi d’aquest conjunt i de les altres troballes de moneda islàmica –dinars, dírhams i felusos– dels primers temps de la conquesta del segle VIII a l’àrea de l’actual Catalunya, es proposen algunes reflexions sobre la circulació monetària en aquest període històric específic
Consommation collaborative : des formes de sociabilité ancrées dans des compromis intra-individuels entre « mondes »
No full textInternational audiencePour comprendre les implications de l’hybridation des dimensions économique et sociale dans les échanges entre pairs en consommation collaborative marchande, l’article analyse, par le prisme des « Économies de la grandeur » et d’un cadrage théorique de la sociabilité, les compromis intra-individuels entre « mondes » des acheteurs et les formes de sociabilité particulières qui en émanent. L’étude qualitative fondée sur 33 entretiens individuels d’acheteurs utilisant des plateformes de redistribution et/ou d’accès à des biens caractérise les formes de sociabilité observables dans ces relations sociales marchandes entre pairs et les compromis intra-individuels réalisés par les acheteurs sur lesquels elles sont fondées. Quatre compromis intra-personnels entre le « monde » marchand et un autre « monde » (domestique, industriel, inspiration, « fraternité »), dont émergent huit formes de sociabilité de caractéristiques différentes, sont qualifiés. Des implications théoriques et managériales et des voies de recherche sont finalement fournies