240Pu/239Pu isotopic ratio measurements in micrometric Pu and MOX particles using Secondary Ion Mass Spectrometry

International audienc

Improved high-order integral fast terminal sliding mode-based disturbance-observer for the tracking problem of PMSG in WECS

International audienc

Improved model for continuous, real-time assessment and monitoring of the resilience of systems based on multiple data sources and stakeholders

International audienceFaced with an increasing level of disruption from natural disasters, terrorist attacks or internal failures, organisations need to ensure their business continuity. Ensuring this continuity depends, among other things, on the continuous assessment, monitoring, and management of their resilience based on the variations of the functionalities. Resilience-assessment methodologies are nowadays used to (1) prepare stakeholders for future crisis management situations and (2) help stakeholders assess past levels of resilience in the aftermath of the crisis. However, continuous, real-time monitoring and assessment of resilience is generally either outside the scope of such methods or limited to raw data representation, lacking effective filtering, interpretation, or integration in the evolving context of the organisation’s activities. This paper enhances previous works on resilience assessment. The result is a complementary methodology for continuous, real-time resilience assessment and monitoring based on multiple data-sources and stakeholders. The novelty is (1) in the context of use of the methodology, (2) in the way the functionality analysis model is obtained and (3) in the way the resilience is continuously assessed

"Cosmopolitanism from within: how to be cosmopolitan in times of exception?- Reflections on the closing of the Franco-American border in times of pandemic"

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Les « groupes Medvedkine » (1967-1974), transfert tardif de la culture d’agit-prop soviétique ?

International audienceFrom 1967 to 1974, collectives of worker-filmmakers called “Medvedkin groups” were formed in France in the wake of the strikes in the textile and automobile industries of Besançon and Sochaux, under the impetus of filmmaker Chris Marker (1921-2012). In France, these groups represented both a social and creative experiment in militant cinema, characterised by the workers’ own appropriation of the film-making process in the service of an autonomous and reflexive representation of their struggles. But what does Medkevkin stand for? For Marker, it was a question of materialising a filiation between the ideological and militant struggle of the Soviet filmmaker Aleksandr Medvedkin (1900-1989) in the 1920s and early 1930s in the USSR (embodied by his “film-train”), and that of the French workers. For him, these two struggles were fundamentally linked, since the French workers, from the end of 1967, expressed the will (as Medvedkin invited Russian workers and peasants to do) to appropriate the cinematographic discourse that concerned them. Medvedkin Alexander, cinema, cultural relationsDe 1967 à 1974, des collectifs d’ouvriers-cinéastes appelés « groupes Medvedkine » se formèrent en France, dans le sillon des grèves de l’industrie textile et automobile de Besançon et de Sochaux, sous l’impulsion du cinéaste Chris Marker (1921-2012). Ces groupes représentèrent en France une expérience à la fois sociale et créatrice de cinéma militant, caractérisée par l’appropriation par les ouvriers eux-mêmes du processus de création des films au service d’une représentation autonome et réflexive de leurs luttes. Mais de quoi Medvedkine est-il le nom ? Il s’agit pour Marker de matérialiser un lien de filiation : celle qu’il souhaite établir entre le combat idéologique et militant du cinéaste soviétique Alexandre Medvedkine (1900-1989), dans les années 1920 et au début des années 1930 en URSS (incarnée par son « Ciné-train »), et celui des ouvriers français, dont le projet lui semble fondamentalement lié, puisque ceux-ci expriment dès la fin de l’année 1967 la volonté, comme Medvedkine y invitait ouvriers et paysans russes, de s’approprier le discours cinématographique qui les concerne.С 1967 по 1974 гг. во Франции во время забастовок в текстильной и автомобильной промышленности в городах Безансон и Сошо при посредничестве режиссера Криса Маркера (1921–2012) были созданы коллективы рабочих-кинорежиссёров под названием «киногруппы Медведкина». Во Франции эти группы представляли собой социальный и творческий эксперимент в области ангажированного кино, характеризующийся тем, что рабочие сами отвечали за процесс создания фильмов, призванных создавать автономную и рефлексивную репрезентацию их борьбы. Но что стоит за именем Медведкина? Для Маркера это вопрос материализации общих идей : он хотел установить связь между идеологической и социальной борьбой советского кинематографиста Александра Медведкина (1900–1989) в 1920-х и начале 1930-х гг. в СССР (олицетворяемой его «Кино-поездом») и французскими рабочими, проект которых казался Маркеру фундаментально связанным с ним. Рабочие Безансона и Сошо с конца 1967 г. стремились к овладению кинематографическим дискурсом о самих себе, по примеру того, к чему склонял советских рабочих и крестьян Медведкин

Ingénierie sémiotique et modélisation diagrammatique. Au-delà du modèle de Turing

International audienceThis article first shows how the spatial and temporal modelling of the objects of experience in general leads to the idea of graphic device. In a second part, we show how this historical and genetic declension of the concept of device leads to the current scientific model of what any device is: the Turing model, otherwise known under the technical name of Turing machine. Once the limits of the Turing model have been identified, we expose in a third and final part the reasons that allow us to introduce the notion of diagrammatic device, which is, according to us, the principle of a new type of modelling: diagrammatic modelling.Cet article montre dans un premier temps comment la modélisation spatiale et temporelle des objets de l’expérience en général conduit à l’idée de dispositif graphique. En exposant la déclinaison historico-génétique du concept de dispositif, nous montrons dans une deuxième partie dans quelle mesure cette déclinaison conduit au modèle scientifique actuel de ce qu’est tout dispositif : le modèle de Turing autrement connu sous le nom technique de machine de Turing. Une fois identifiées les limites du modèle de Turing, nous exposons dans une troisième et dernière partie les raisons qui nous autorisent à introduire la notion de dispositif diagrammatique, qui est selon nous au principe d’un nouveau type de modélisation : la modélisation diagrammatique

Impact de l'ostéopathie sur les mouvements oculaires de poursuite lisse chez les adultes sains

International audienceThe idea that osteopathic manipulative treatments (OMTs) have an impact on the human visual system is not new. This hypothesis is based on the restoration of the fascial system elasticity (i.e., the connective tissue enclosing all our organs, including the eyes) by OMTs. However, to date, there is no empirical evidence to support this hypothesis.We conducted a randomized, double-blind, controlled study to evaluate the effect of an OMT on smooth pursuit in healthy young adults (aged 18 to 35 years). A total of 95 participants were randomly allocated to three groups. Each group performed two tests of 40 smooth pursuit trials. Between these tests, one of the groups was treated with an OMT, the second group received a sham treatment and a control group discussed with the practitioner without being touched.In all groups, smooth pursuit duration (i.e., time spent to track a moving target without saccades) increased and latency (i.e., time elapsed between target onset displacement and ocular pursuit initiation) decreased between the two tests. Nevertheless there was no greater improvement in smooth pursuit for the OMT group as compared to the other two groups.These preliminary results confirmed that procedural learning of smooth pursuit occurs within 40 trials, but failed to support the hypothesis of oculomotor enhancement by OMT. Further studies should focus on elderly volunteers or populations with oculomotor disorders.Note : This study has been pre-registered on Clinicals Trials https://clinicaltrials.gov/ct2/show/NCT05018390?draw=

Active Clamp Circuit for Online ON-State Voltage Measurement of High Voltage SiC MOSFETs Power Module

International audienceThis paper deals with online measurement of degradation sensitive electrical parameters leading to a healthmonitoring approach for power module. The on-state resistance RDSON is a key aging indicator of silicon carbideMOSFETs. It can provide information on both chip and packaging degradation allowing more reliable powerelectronic converter. This on-state resistance can be determined using both the on-state current and voltage of thepower semiconductor. This paper focuses on an on-state voltage measurement circuit for high power modules (upto 3.3 kV, 500A SiC module). A power module switching oscillation model is used to design and fine tune theproposed solution. Finally, the proposed circuit is successfully tested on a double pulse test for various modulebase plate temperatures and compared to data obtained with a static curve tracer Keysight B1505

« Tom Stoppard’s Jumpers: writing for an erudite audience? »

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Scientific value of the quantum tests of equivalence principle in light of Hilbert's sixth problem

International audienceIn his sixth problem, Hilbert called for an axiomatic approach to theoretical physics with an aim to achieve precision and rigour in scientific reasoning, where logic and language (semantics) of physics play the pivotal role. It is from such a point of view, we investigate the scientific value of the modern experiments to perform quantum tests of equivalence principle. Determination of Planck constant involves the use of acceleration due to gravity of the earth (g) that results in the force on a test mass. The equivalence between inertial mass and gravitational mass of a test object is assumed in the process of logically defining g from the relevant hypotheses of physics. Consequently, if Planck constant is used as input in any experiment (or in the associated theory that founds such an experiment) that is designed to test the equivalence between inertial and gravitational mass, then it is equivalent to establish a scientific truth by implicitly assuming it i.e. a tautology. There are several notable examples which plague the frontiers of current scientific research which claim to make quantum test of equivalence principle. We question the scientific value of such experiments from Hilbert’s axiomatic point of view. This work adds to the recently reported semantic obstaclein any axiomatic attempt to put ``quantum” and ``gravity” together, albeit with an experimental tint