65 research outputs found

    Guerre et opinion publique : communiquer, informer, désinformer (entretien)

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    Performance de l’oxymĂ©trie nocturne dans le diagnostic du syndrome d’apnĂ©es du sommeil. Etude monocentrique menĂ©e au centre Hospitalier de Longjumeau/France: Performance of nocturnal oximetry in the diagnosis of sleep apnea syndrome. Single-center study from Longjumeau Hospital Center / France

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    Context and objective. Sleep apnea-hypopnea syndrome (SAHOS) is currently under diagnosed or ignored, due to a poor access to polysomnography, the ’gold-standard’’ diagnostic test. Yet, sleep disorder is linked to many complications mainly, cardiovascular disorders. The present study aimed to assess the relevance of overnight pulse oximetry in diagnosing SAHOS. Methods. A cross-sectional analysis was conducted between January 1st and September 30th, 2017. All patients suspected of SAHOS syndrome underwent an overnight pulse oximetry (OPO) and a respiratory polygraphy (PG). Data were analysed using Excel 2010 and SSPSS 21.0, to establish the sensitivity, specificity, the positive and negative predictive value and ROC curve was calculated to determine the performance of OPO compared to PG. Results. 201 patients were enrolled (median age of 64.6 +/- 11.8 years). Males (55%) and obese (medium BMI of 32 kg/mÂČ were preponderant. The sensitivity and specificity of overnight pulse oximetry were 87 % and 85 %, respectively with ROC curve prominently rising at 0.75. Conclusion. The study showing a high sensitivity and specificity suggests that the overnight oximetry could stand as a more accessible alternative to polygraphy in the diagnosis of Sleep apnea-hypopnea syndrome where the latter is not available. Contexte & objectif. Le syndrome d’apnĂ©es du sommeil est une pathologie frĂ©quemment sous diagnostiquĂ©e et souvent mĂ©connue; particuliĂšrement Ă  cause d’une accessibilitĂ© insuffisante au gold-standard du diagnostic, la polysomnographie ou la polygraphie ventilatoire. Et pourtant, l’affection est responsable des complications surtout cardiovasculaires majeures. L’objectif de la prĂ©sente Ă©tude Ă©tait d’évaluer le niveau de performance de l’oxymĂ©trie nocturne dans le diagnostic du syndrome d’apnĂ©es du sommeil. MĂ©thodes. EnquĂȘte transversale menĂ©e entre le 1er janvier 2016 et le 30 septembre 2017. Tous les patients hospitalisĂ©s pour suspicion du syndrome d’apnĂ©es du sommeil ont bĂ©nĂ©ficiĂ© d’une oxymĂ©trie nocturne et d’une polygraphie ventilatoire. Les logiciels Excel 2010 et SSPSS 21.0 ont permis d’analyser les donnĂ©es. Nous avons dĂ©terminĂ© la sensibilitĂ©, la spĂ©cificitĂ©, la valeur prĂ©dictive positive et la valeur prĂ©dictive nĂ©gative. La courbe ROC a Ă©tĂ© calculĂ©e. p < 0,05. RĂ©sultats. Au total 201 patients d’ñge moyen de 64,6±11,8 ans, avec une prĂ©dominance masculine (55%) et en majoritĂ© obĂšses (IMC moyen de 32kg/mÂČ) ont Ă©tĂ© inclus. La sensibilitĂ© et la spĂ©cificitĂ© de l’oxymĂ©trie nocturne sont respectivement de 87 et de 85% avec une courbe ROC montrant une surface importante sous la courbe de 0,75. Conclusion. Avec sa sensibilitĂ© et spĂ©cificitĂ© Ă©levĂ©es, l’oxymĂ©trie nocturne peut constituer une alternative valable au diagnostic du syndrome d’apnĂ©es du sommeil. Son innocuitĂ© et sa bonne acceptabilitĂ© en font un outil facilement exportable et recommandable en cas de carence de moyens appropriĂ©s

    Construction and test of a fine-grained liquid argon preshower prototype

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    A separate liquid argon preshower detector consisting of two layers featuring a fine granularity of 2.5~10−3^{\mathrm{-3}} was studied by the RD3 collaboration. A prototype covering approximately 0.8 in pseudo-rapidity and 9 degrees in azimuth was built and tested at CERN in July 94. CMOS and GaAs VLSI preamplifiers were designed and tested for this occasion. The combined response of this detector and an accordion electromagnetic calorimeter prototype to muons, electrons and photons is presented. For minimum ionizing tracks a signal-to-noise ratio of 4.5 per preshower layer was measured. Above 150~GeV the space resolution for electrons is better than 250~ÎŒ\mum in both directions. The precision on the electromagnetic shower direction, determined together with the calorimeter, is better than 4 mrad above 50~GeV. It is concluded that the preshower detector would adequately fulfil its role for future operation at CERN Large Hadron Collider

    Performance of the ATLAS Electromagnetic Calorimeter End-cap Module 0

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    The construction and beam test results of the ATLAS electromagnetic end-cap calorimeter pre-production module 0 are presented. The stochastic term of the energy resolution is between 10% GeV^1/2 and 12.5% GeV^1/2 over the full pseudorapidity range. Position and angular resolutions are found to be in agreement with simulation. A global constant term of 0.6% is obtained in the pseudorapidity range 2.5 < eta < 3.2 (inner wheel)

    Chapitre 4. La diplomatie du pétrole

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    Les États-Unis jouent en ce dĂ©but du XXIe siĂšcle un rĂŽle tout Ă  fait exceptionnel sur la scĂšne internationale. Il n’y a pas de monde multipolaire dans la mesure oĂč aucun autre pĂŽle de puissance ne peut se comparer aux États-Unis qui n’ont ni pairs ni compĂ©titeurs rĂ©els. Ils sont rĂ©ellement le premier empire Ă  l’ñge global. Il serait pourtant inexact d’en tirer comme conclusion que le monde est unipolaire. De l’Irak Ă  l’Afghanistan, du Venezuela Ă  l’Iran, Washington ne parvient pas dans de nom..

    L'Année stratégique 2012

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    La France veut-elle penser l'international ?

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    In France there is no strategic debate and research worthy of the role this country pretends to have on the international scene. France's incapacity to be understood by its partners proceeds from this old and final report, even though isolation is no longer possible. Bad communication between deciders and public or private research, the little importance of strategic centralisation of thought and powers explains this weakness. Some recent initiatives are grounds for a prudent hoping of renewed interest of state in the dialogue with the experts.Ll n'y a pas en France de dĂ©bat et de recherche stratĂ©giques dignes du rĂŽle que ce pays prĂ©tend avoir sur la scĂšne internationale. De ce constat ancien et sans appel, dĂ©coule notamment l'incapacitĂ© de la France Ă  se faire comprendre de ses partenaires alors mĂȘme que l'isolement n'est plus possible. La mauvaise communication des dĂ©cideurs et de la recherche, publique ou privĂ©e, le peu d'importance accordĂ©e Ă  la rĂ©flexion stratĂ©gique et la centralisation des pouvoirs expliquent cette faiblesse. Quelques initiatives rĂ©centes autorisent le prudent espoir d'un regain d'intĂ©rĂȘt de l'État pour un dialogue avec les experts.Boniface. La France veut-elle penser l'international ?. In: Espaces Temps, 71-73, 1999. De la guerre. Un objet pour les sciences sociales, sous la direction de Jacques LĂ©vy et Jean-Claude Ruano-Borbalan. pp. 59-66
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