Madelung, Gross-Pitaevskii and Korteweg

This paper surveys various aspects of the hydrodynamic formulation of the nonlinear Schrodinger equation obtained via the Madelung transform in connexion to models of quantum hydrodynamics and to compressible fluids of the Korteweg type.Comment: 32 page

Towards a multidimensional assessment grid of smallholders' oil palm plantations: a preliminary proposal from SPOP Project

International audienceThis contribution is an intermediate product of the ANR 1 research project, SPOP (Sustainable Palm Oil Production). SPOP project aims at providing scientific knowledge on the diverse oil palm cropping systems in Indonesia and Cameroon, and on their social, economic and environmental impacts. This knowledge should help identify best practices, adaptation strategies, and improvement needs towards sustainability. At this stage of the research programme, we first aimed to present the applied methodology and analyse its relevancy in light of the first field data collection

Guillain-Barré Syndrome, Greater Paris Area

We studied 263 cases of Guillain-Barré syndrome from 1996 to 2001, 40% of which were associated with a known causative agent, mainly Campylobacter jejuni (22%) or cytomegalovirus (15%). The cases with no known agent (60%) peaked in winter, and half were preceded by respiratory infection, influenzalike syndrome, or gastrointestinal illness

Néoplasies intraépithéliales du col utérin chez la congolaise à Kinshasa : intérêt des biomarqueurs immunohistochimiques: Intraepithelial neoplasias of the uterine cervix in the Congolese in Kinshasa : interest of immunohistochemical biomarkers

Context and objective. Although cervical cancer remains the second most frequent in women in Africa, immunohistochemical biomarkers for its diagnosis is rarely used in sub-Saharan Africa. The aim of this study was to demonstrate the contribution of biomarkers p16 and Ki-67 in the diagnosis of cervical intraepithelial neoplasia. Methods. This was a retrospective study carried out in five Pathology laboratories in Kinshasa. Biopsy slides were reread and reclassified by at least two independent pathologists in Kinshasa University Hospital based on the nomenclature of Bethesda/WHO. Immunolabelling (p16 and Ki-67) was carried out with external quality control in Europe. Results. A total of 70 cases were included. All 24 cases of high grade intraepithelial neoplasia (CIN2, CIN3 and CIS) were positively marked by p16 and Ki-67 whereas low grade lesions were positively marked for 41 cases of CIN1 and negatively marked for 5 cases (3 of CIN1 and 2 of CP). Certain lesions have been reclassified. Immunohistochemical labeling was significantly associated with the grade of intraepithelial neoplasia for p16 (p = 0.001) and for Ki-67 (p = 0.004). Conclusion.  p16 and Ki-67 are specific and reliable biomarkers for an optimal diagnosis of intraepithelial neoplasia of the cervix. Contexte et objectif.  Bien que le cancer du col utérin soit le deuxième cancer plus fréquent chez la femme en Afrique, le recours aux biomarqueurs immunohistochimiques reste exceptionnel en Afrique subsaharienne. La présente étude avait pour objectif de montrer l’apport des biomarqueurs p16 et Ki-67 dans le diagnostic des néoplasies intra-épithéliales du col utérin. Méthodes. C’était une étude rétrospective réalisée dans cinq laboratoires d’Anatomie Pathologique de Kinshasa. Des lames biopsiques ont été relues et reclassées par au moins deux pathologistes indépendants aux Cliniques Universitaires de Kinshasa en suivant la nomenclature de Bethesda/OMS. L’immunomarquage (p16 et Ki-67) a été réalisé avec un contrôle qualité externe en Europe. Résultats. 70 cas ont été inclus. Les 24 cas des néoplasies intra-épithéliales de haut grade (CIN2, CIN3 et CIS) étaient marquées positivement par p16 et Ki-67 alors que celles de bas grade étaient marquées positivement pour 41 cas de CIN1 et négativement pour 5 cas (3 de CIN1 et 2 de CP). Certaines lésions ont été requalifiées. L’immunomarquage était significativement associé au grade des néoplasies pour la p16 (p=0,001) et pour le Ki-67 (p=0,004). Conclusion. P16 et Ki-67 sont des biomarqueurs spécifiques et efficaces pour un diagnostic optimal des néoplasies intra-épithéliales du col utérin. &nbsp

Argumentation et narration

À travers des contributions de diverses disciplines, cette enquête montre très concrètement que la puissance heuristique de la narration est un levier indispensable à toute pratique de l’argumentation. Elle montre aussi que si les deux registres concourent ensemble à une rationalité pleinement incarnée, ils ne se confondent jamais totalement

Radiofrequency and mechanical tests of silver coated CuCrZr contacts for the ITER ion cyclotron antenna

The ITER Ion Cyclotron Resonance Heating (ICRH) system is designed to couple to the plasma 20 MW of RF power from two antennas in the 40–55 MHz frequency range during long pulses of up to 3600 s and under various plasma conditions with Edge Localized Modes. Radio-Frequency (RF) contacts are integrated within the ITER ICRH launcher in order to ensure the RF current continuity and ease the mechanical assembly by allowing the free thermal expansion of the Removable Vacuum Transmission Line coaxial conductors during RF operations or during 250 °C baking phases. A material study has been carried out to determine which materials and associated coatings are relevant for RF contacts application in ITER. In parallel, RF tests have been performed with a new prototype of Multi-Contact® LA-CUT/0,25/0 contacts made of silver-coated CuCrZr louvers. During these tests on a RF vacuum resonator, currents between 1.2 kA and 1.3 kA peak have been reached a few tens of times in steady-state conditions without any visible damage on the louvers. A final 62 MHz pulse ending in a 300 s flat top at 1.9 kA resulted in severe damage to the contact. In addition, a test bed which performs sliding test cycles has been built in order to reproduce the wear of the contact prototype after 30 000 sliding cycles on a 3 mm stroke at 175 °C under vacuum. The silver coating of the louvers is removed after approximately a hundred cycles whilst, to the contrary, damage to the CuCrZr louvers is relatively low