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R-hulloid of the vertices of a tetrahedron
No full textInternational audienceThe R-hulloid, in the Euclidean space R3, of the set of vertices V of a tetrahedron T is the minimal closed set containing V such that its complement is the union of open balls of radius R. When R is greater than the circumradius of T , the boundary of the R-hulloid consists of V and possibly of four spherical subsets of well defined spheres of radius R through the vertices of T . The existence of a value R∗ such that these subsets collapse into a point O∗, in the interior of T , is investigated; in such a case O∗ belongs to four spheres of radius R∗, each one through three vertices of T and not containing the fourth one. As a consequence, the range of ρ such that V is a ρ-body is described completely. This work generalizes to dimension three previous results, proved in the planar case and related to the three circles Johnson’s Theorem
Dépliement de Polycubes Pleins
No full textInternational audienceA solid polycube is a face-connected set of unit cubes, where, unlike classical definitions for polycubes, shared faces between adjacent cubes are not removed. We prove by mathematical induction that any such polycube can be edge-unfolded into a 2D net without refinement. Our proof relies on the concept of a perfect net, defined as a net in which two designated edges are placed on the far left and far right sides. This configuration enables consistent gluing of nets in a single direction throughout the induction process, thereby guaranteeing that no overlaps occur at any step
Le poids de la tradition ou la délicate preuve d'un mode de vie : précisions sur le champ d'application de la loi du 5 juillet 2000 relative à l'accueil et à l'habitat des gens du voyage: Commentaire sous CE, 6 juin 2025, n°486577, A., Lebon T.
No full textInternational audienceLe Conseil d’État, sans innover pleinement, procède dans cette décision à une synthèse dogmatique de la jurisprudence existant en proposant d’adopter un raisonnement en deux temps. Il précise que la qualification de la non-sédentarité du requérant doit être appréciée au regard d’une part d’un élément matériel permettant de déduire la nature mobile de sa résidence et, d’autre part, d’un élément intentionnel mobilisant un faisceau d’indices relatifs au choix du mode de vie en itinérance. Ce second élément peut être remis en cause par le requérant qui souhaiterait contester l’application des dispositions législatives dont il fait l’objet. En reconnaissant l’extension de la procédure d’expulsion accélérée de l’article 9 de la loi Besson II à la communauté Rom, cette décision élargit les moyens d’action de l’autorité publique et soulève deux questions. D’abord, elle invite à reposer la question de la dimension ethnique — présente mais non avouée — de la notion d’« habitat traditionnel » figurant dans la loi. Ensuite, elle contribue à entretenir des tensions durables entre des communautés qui ne se reconnaissent plus dans le dispositif de cette loi, dans un contexte déjà marqué par la fragilité des politiques d’accueil des gens du voyage
Advanced Application of “Blank Roadmap” Technique for Transvenous Approach
No full textInternational audienceBackground The efficacy of endovascular treatment (EVT) in acute ischaemic stroke due to distal medium vessel occlusion (DMVO) remains uncertain. Our study aimed to evaluate the safety and efficacy of EVT compared with the best medical management (BMM) in DMVO. Methods In this prospectively collected, retrospectively reviewed, multicentre cohort study, we analysed data from the Multicentre Analysis of primary Distal medium vessel occlusions: effect of Mechanical Thrombectomy registry. Patients with acute ischaemic stroke due to DMVO in the M2, M3 and M4 segments who underwent EVT or received BMM were included. Primary outcome measures comprised 10 co-primary endpoints, including functional independence (mRS 0–2), excellent outcome (mRS 0–1), mortality (mRS 6) and haemorrhagic complications. Propensity score matching was employed to balance the cohorts. Results Among 2125 patients included in the primary analysis, 1713 received EVT and 412 received BMM. After propensity score matching, each group comprised 391 patients. At 90 days, no significant difference was observed in achieving mRS 0–2 between EVT and BMM (adjusted OR 1.00, 95% CI 0.67 to 1.50, p>0.99). However, EVT was associated with higher rates of symptomatic intracerebral haemorrhage (8.4% vs 3.0%, adjusted OR 3.56, 95% CI 1.69 to 7.48, p<0.001) and any intracranial haemorrhage (37% vs 19%, adjusted OR 2.61, 95% CI 1.81 to 3.78, p<0.001). Mortality rates were similar between groups (13% in both, adjusted OR 1.48, 95% CI 0.87 to 2.51, p=0.15). Conclusion Our findings suggest that while EVT does not significantly improve functional outcomes compared with BMM in DMVO, it is associated with higher risks of haemorrhagic complications. These results support a cautious approach to the use of EVT in DMVO and highlight the need for further prospective randomised trials to refine treatment strategies
Vessel Coagulation in Third Space Endoscopy: a Randomized Controlled Trial
No full textInternational audienceBackground: Third-space endoscopy is the standard of care for neoplastic and motility disorders; however, it is technically challenging because of the high risk of intraprocedural bleeding. Such a risk may be reduced by prophylactic coagulation of the submucosal vessels, but it requires instrument exchange. A new approach involves pre-sealing the submucosal vessels using standard electrocautery settings under brief saline immersion using the same knife. Methods: Patients undergoing third space procedures (ESD or POEM) were randomized to receive either targeted saline-immersion pre-sealing (study group) or conventional coagulation (CO2 insufflation, control group) for prophylactic management of vessels ≥1.2 mm. Dissection settings were identical (HybridKnife, SWIFT COAG mode). Rate of at per-patient intraprocedural bleeding requiring retreatment for vessels ≥1.2 mm was the main outcome. Per-vessel analyses were also performed. The use of an adjunctive device and coagulation time were also assessed. Results: Seventy patients (37 immersion, 33 control) with 864 ≥1.2 mm vessels were included. Saline-immersion pre-sealing significantly reduced bleeding rates both at per patient (32.4% vs 75.8%, RR 0.43, 95% CI 0.26-0.71; NNT 2.3; p=0.01) and at per vessel analysis (6.3% vs 29.9%, RR 0.21; 95% CI 0.14-0.31; NNT 4.2; p<0.01). The use of coagulation forceps for bleeding treatment also decreased (0% vs 24.2% and 0% vs 8.3%;p<0.01). A significant reduction in coagulation time was reported in the saline-immersion group (22.7±26.4 seconds vs 29.6±49.8 seconds;p<0.01). Conclusions: A substantial reduction in the risk of intraprocedural bleeding was achieved by saline-immersion pre-sealing in per-patient and per-vessel analyses, prompting its implementation in clinical practice
Les moniteurs des maisons familiales rurales. Sociologie d'un groupe professionnel méconnu
No full textInternational audienceNés dans l’élan des mouvements paysans de l’entre-deux-guerres, les moniteurs du mouvement des maisons familiales rurales (MFR) demeurent des figures discrètes, pourtant essentielles, de l’accompagnement des jeunesses agricoles et rurales. À partir de leurs récits biographiques et des archives du mouvement, cet ouvrage retrace la manière dont leur fonction s’est façonnée puis transformée : du « moniteur agricole » proche de l’instituteur et enraciné dans son territoire au pédagogue chargé de remobiliser des adolescents en difficulté scolaire. Il offre une plongée vivante dans l’histoire d’un groupe professionnel méconnu et dévoile, à travers eux, les mutations de la formation en alternance et des mondes ruraux
Widely tunable dual acousto-optic interferometric device based on a hollow core fiber
No full textInternational audienceAn all-fiber, dual Mach-Zehnder interferometer (MZI) based on an acoustically modulated hollow core fiber (HCF) is experimentally demonstrated for the first time. By attaching an acoustic driver between the fixed ends of an HCF, we fabricated two acousto-optic modulators (AOMs) with distinct driver positions, allowing synchronization of two in-line MZIs inside the HCF. The first MZI is set by two acoustic long-period gratings separated by a second MZI formed at the fiber and driver-attaching region. We show that this setup enables frequency-tuning of the coupling between the fundamental and higher-order modes in the HCF. Additionally, we simulate and analyze the HCF modal couplings and MZIs' modulated spectra under distinct device parameters using the transfer matrix method. The new AOM-MZI enables tuning of the MZI's free spectral range by adjusting 1 Hz of the electrical frequency, which is promising to modulate multiwavelength filters, sensors, and fiber lasers
Sur les routes de la sociologie. Épisode 3 avec Manon Moncoq, anthropologue et conseillère funéraire [Podcast]
No full text[Podcast] Réalisation : Joachim Benet Rivière et Vonnick Ribéraud / Montage et mixage : Vonnick Ribéraud. Durée : 35 minutesInternational audience[Sur les routes de la sociologie (3). Manon Moncoq, anthropologue et consultante dans le funéraire]Pour ce troisième podcast, Sur les routes de la sociologie part à la rencontre de Manon Moncoq, doctorante en anthropologie et consultante dans le domaine du funéraire. Elle réalise sa thèse sur les funérailles écologiques et questionne notre rapport à la mort, au corps et à l'environnement
The Role of Multimodality Imaging in Multiple Valvular Heart Diseases. A Clinical Consensus Statement of the European Association of Cardiovascular Imaging (EACVI) of the ESC
No full textInternational audienceWith this document, the European Association of Cardiovascular Imaging provides an Expert Consensus on the role of multi-modality imaging (MMI) in the management of patients with multiple valvular heart disease (MVD). Emphasis is given to the use of MMI to unravel the diagnostic challenges that characterize these patients and to improve risk stratification. Complementing the last European Society of Cardiology and European Association of Cardio-Thoracic Surgery guidelines on valvular heart disease, this Expert Consensus document also outlines how MMI assessment should form an integral part of the multi-disciplinary heart team discussion for patients with MVD to help with complex decision-making regarding the choice and timing of treatment
