Scientific Publications of the University of Toulouse II Le Mirail
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Isogeometric multipatch surface fitting in tomographic images: application to lattice structures
No full textInternational audienceAdditive manufacturing has enabled the production of cellular architected (lattice) structures known for their exceptional mechanical performances. However, the printed components often exhibit geometric defects on a scale close to that of lattice struts, leading to significant deviations in mechanical behavior when comparing simulations based on the as-designed (defect-free) geometry with experimental tests on the as-manufactured (imperfect) geometry. In this work, we develop a method to extract an analysis-suitable CAD-based geometry from 3D scan data. We start by building a multipatch B-spline surface model of the as-designed lattice boundary, and then deform it to match its as-manufactured counterpart observed in a volumetric image. To achieve this, key contributions include a data fitting metric based on the Virtual Image Correlation approach, combined with an image learning component; the integration of the membrane strain energy of the surface for regularization; the enforcement of higher continuity between patches where appropriate; an automatic estimation of the pose of the CAD object in the image; and the computation of a distance indicator map between the aligned CAD model and the as-manufactured surface. These elements enable comprehensive, accurate, and efficient measurement of geometric defects in lattice structures. Validated through various experiments, including those on a BCC lattice structure, this method achieves sub-voxel accuracy. Ultimately, it provides a compact and explicit representation of the as-manufactured geometry, maintaining the same CAD-based discretization as the initial design, and thereby facilitating quantitative defect assessment
Investigation of the effect of ferroelectric polarization on the spin state of spin crossover complexes embedded in a piezopolymer matrix
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Le malentendu en fin de vie : un impensé des soins palliatifs
No full textInternational audiencePalliative care is active care focused on a holistic approach to the person in the terminal phase of their illness. Palliative culture, originally based on Christian values of humanism and solidarity, views the terminal period of life as a precious time that must be fully invested. However, at least one third of patients admitted to palliative care are unaware of the real progress of their illness. Palliative support then consists of helping these patients move towards awareness of their finiteness, allowing them to put certain affairs in order (emotional, material, financial, etc.). The palliative discursive paradigm of “truth” imposed on the dying, excluding the possibility of misunderstanding as to their finitude, sometimes turns into institutional violence. This violence of pacified death is part of a new form of institutional thanatopolitics redefining the boundaries of the normal and the pathological at the end of life.Les soins palliatifs sont des soins actifs axés sur une approche holistique de la personne en phase terminale de sa maladie. La culture palliative, originellement fondée sur des valeurs chrétiennes d’humanisme et de solidarité, envisage la période terminale de la vie comme un temps précieux qu’il s’agit d’investir pleinement. Or, au moins un tiers des patients admis en soins palliatifs ignorent l’état réel d’avancement de leur maladie. L’accompagnement palliatif consiste alors à faire cheminer ces patients vers la conscientisation de leur finitude, leur permettant de mettre en ordre certaines affaires (affectives, matérielles, financières...). Le paradigme discursif palliatif de "vérité" écarte la possibilité du malentendu et se mue parfois en violence institutionnelle. Cette violence de la mort pacifiée s’inscrit au sein d’une nouvelle forme de thanatopolitique d’institution, redéfinissant les frontières du normal et du pathologique de la fin de vie
Stimmen des Antikolonialismus: Eine globalhistorische Spurensammlung 1615-1915
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"Jean Boudou - Joan Bodon, écrivain de l'entre-deux"
No full textInternational audienceRanging from fairy tales to poems and novels, from the Occitan langage to the French language, from Rouergue to Silesia and Algeria and owing to his characters always moving, Joan Bodon (Jean Boudou) revealed and developed a deep reflection on our own identity and on the future of the cultures of communities that the modern age threatens.Du conte et de la poésie au roman, de la langue occitane à la langue française, du Rouergue à la Silésie et à l’Algérie, grâce à ses personnages toujours en mouvement, Joan Bodon (Jean Boudou) a révélé et développé une réflexion profonde sur l’identité de chacun et l’avenir culturel des collectivités que le monde moderne met à mal
Le temps des facultés (1808-1870) : de l’enseignement à la production des savoirs
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La levée du blé en ligne. Le travail de maintenance des plateformes du financement participatif agricole
No full textCommunautés canoniales régulières des Alpes occidentales (XIe-XIIIe siècle)
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