142 research outputs found

    SorĂšze – Site minier mĂ©tallurgique de la grotte-aven du MĂ©tro

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    Lien Atlas (MCC) :http://atlas.patrimoines.culture.fr/atlas/trunk/index.php?ap_theme=DOM_2.01.02&ap_bbox=2.014;43.396;2.148;43.486 AprĂšs la dĂ©couverte d’un rĂ©seau supĂ©rieur dans la grotte-aven du MĂ©tro le 1er juillet 2012 (BSR 2011, 2012), des relevĂ©s des traces archĂ©ologiques ont Ă©tĂ© rĂ©alisĂ©es en 2013. Ce rĂ©seau est constituĂ© de deux galeries parallĂšles anastomosĂ©es en deux points. Le nouveau rĂ©seau dĂ©veloppe 120 m environ de conduits. Nous y avons relevĂ© la plupart des traces habituelles dĂ©..

    SorĂšze – Grotte du Calel, site minier mĂ©tallurgique

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    Lien Atlas (MCC) :http://atlas.patrimoines.culture.fr/atlas/trunk/index.php?ap_theme=DOM_2.01.02&ap_bbox=2.014;43.396;2.148;43.486 Un relevĂ© exhaustif des traces archĂ©ologiques, tĂ©moins d’une exploitation d’hydroxydes de fer mĂ©diĂ©vale (1050-1150 apr. J.-.C.), a commencĂ© dans cette importante grotte sorĂ©zienne, connue pour ses vestiges depuis longtemps (voir dossiers SRA rĂ©digĂ©s par F. Rouzaud, E. Mauduit et J.-P. Calvet de 1989 à 1995). La grotte dĂ©veloppant plus de 9 km de rĂ©seau sur 130 m d..

    Montels – Manchifrotte, Forcia du « Prat del Tour »

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    Ce site connu depuis plusieurs dĂ©cennies et inventoriĂ© au titre de la carte archĂ©ologique, a fait l’objet d’une opĂ©ration de relevĂ© du bĂąti qui a permis d’analyser la structure des murs (parements extĂ©rieurs et intĂ©rieurs scellĂ©s par de la chaux en grosse pierre locale – calcaire – bloquĂ©s par de la pierraille Ă  l’intĂ©rieur – largeur environ 1,60 m) formant un quadrilatĂšre de 8,50 m x 9,50 m. Plusieurs assises sont encore prĂ©sentes. Cet Ă©difice est juchĂ© sur une motte artificielle grossiĂšreme..

    La Bastide-de-SĂ©rou – Tour maĂźtresse du castrum d’Unjat

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    Dans le cadre du PCR « Naissance, Ă©volutions et fonctions des fortifications mĂ©diĂ©vales en comtĂ©s de Foix, Couserans et Comminges » dirigĂ© par Florence Guillot, nous avons rĂ©alisĂ© le relevĂ© du bĂąti de la tour situĂ©e au hameau d’Unjat. Il s’agit d’un grand bĂątiment de forme quadrangulaire de 8 m de large (orientation nord-nord-est - sud-sud-ouest) sur 14 m de longueur (orientation ouest-nord-ouest - est-sud-est). PositionnĂ© en partie sommitale d’une petite colline naturelle, ce bĂątiment est e..

    SorĂšze – Grotte du Calel, rĂ©seau Vidal-Julia

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    Il s’agit du troisiĂšme rapport concernant le relevĂ© exhaustif des traces et indices laissĂ©s par les mineurs mĂ©diĂ©vaux dans la grotte du Calel (cf. BSR 2013 et 2014). Celui-ci concerne la partie est-nord-est du rĂ©seau Vidal-Julia dĂ©couvert par les spĂ©lĂ©ologues locaux en 1973. Soixante-neuf traces et indices ont Ă©tĂ© analysĂ©s, dont les plus caractĂ©ristiques sont des figurations anthropomorphes tracĂ©es au charbon de bois et une gravure de style « arbalĂ©tiforme ». Les dessins anthropomorphes (vu l..

    Exploiting the time of arrival of Cherenkov photons at the 28 m H.E.S.S. telescope for background rejection: Methods and performance

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    In 2012, the High Energy Stereoscopic System (H.E.S.S.) was expanded by a fifth telescope (CT5). With an effective mirror diameter of 28m, CT5 is able to detect the Cherenkov light of very faint gamma-ray air showers, thereby significantly lowering the energy threshold of this telescope compared to the other four telescopes. Extracting as much information as possible from the recorded shower image is crucial for background rejection and to reach an energy threshold of a few tens of GeV. The camera of CT5 is conceived to register the time of the charge pulse maximum with respect to the beginning of the 16 ns integration window of each pixel. This information can be utilised to improve the event reconstruction. It also helps to reduce the background contamination at low energies. We present new techniques for background rejection based on CT5 timing information and evaluate their performance

    Canton de Revel

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    Date de l'opĂ©ration : 1989 (PR) Inventeur(s) : Calvet J.-P Les prospections entreprises sur quatre communes ont rĂ©vĂ©lĂ© plusieurs sites inĂ©dits : Saint-FĂ©lix, La Grange et Cadenac (gisements du Ier s. avant J.-C., avec amphores vinaires italiques Dr. 1) ; Revel, Chemin de la SabiĂšre (Ă©tablissement gallo-romain) ; Saint-Julien, En Coque (souterrain amĂ©nagĂ© de type monocellulaire) ; Roumens, le Village (dĂ©potoir constituĂ© de cĂ©ramiques du XVIe s. et d’ossements humains)

    Satellite and in situ observations for advancing global Earth surface modelling: a review

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    In this paper, we review the use of satellite-based remote sensing in combination with in situ data to inform Earth surface modelling. This involves verification and optimization methods that can handle both random and systematic errors and result in effective model improvement for both surface monitoring and prediction applications. The reasons for diverse remote sensing data and products include (i) their complementary areal and temporal coverage, (ii) their diverse and covariant information content, and (iii) their ability to complement in situ observations, which are often sparse and only locally representative. To improve our understanding of the complex behavior of the Earth system at the surface and sub-surface, we need large volumes of data from high-resolution modelling and remote sensing, since the Earth surface exhibits a high degree of heterogeneity and discontinuities in space and time. The spatial and temporal variability of the biosphere, hydrosphere, cryosphere and anthroposphere calls for an increased use of Earth observation (EO) data attaining volumes previously considered prohibitive. We review data availability and discuss recent examples where satellite remote sensing is used to infer observable surface quantities directly or indirectly, with particular emphasis on key parameters necessary for weather and climate prediction. Coordinated high-resolution remote-sensing and modelling/assimilation capabilities for the Earth surface are required to support an international application-focused effort

    Impact of Cerebral Microbleeds in Stroke Patients with Atrial Fibrillation

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    OBJECTIVES: Cerebral microbleeds are associated with the risks of ischemic stroke and intracranial hemorrhage, causing clinical dilemmas for antithrombotic treatment decisions. We aimed to evaluate the risks of intracranial hemorrhage and ischemic stroke associated with microbleeds in patients with atrial fibrillation treated with Vitamin K antagonists, direct oral anticoagulants, antiplatelets, and combination therapy (i.e. concurrent oral anticoagulant and antiplatelet) METHODS: We included patients with documented atrial fibrillation from the pooled individual patient data analysis by the Microbleeds International Collaborative Network. Risks of subsequent intracranial hemorrhage and ischemic stroke were compared between patients with and without microbleeds, stratified by antithrombotic use. RESULTS: A total of 7,839 patients were included. The presence of microbleeds was associated with an increased relative risk of intracranial hemorrhage (aHR 2.74, 95% confidence interval 1.76 - 4.26) and ischemic stroke (aHR 1.29, 95% confidence interval 1.04 - 1.59). For the entire cohort, the absolute incidence of ischemic stroke was higher than intracranial hemorrhage regardless of microbleeds burden. However, for the subgroup of patients taking combination of anticoagulant and antiplatelet therapy, the absolute risk of intracranial hemorrhage exceeded that of ischemic stroke in those with 2-4 microbleeds (25 vs 12 per 1,000 patient-years) and ≄11 microbleeds (94 vs 48 per 1,000 patient-years). INTERPRETATION: Patients with atrial fibrillation and high burden of microbleeds receiving combination therapy have a tendency of higher rate of intracranial hemorrhage than ischemic stroke, with potential for net harm. Further studies are needed to help optimize stroke preventive strategies in this high-risk group. This article is protected by copyright. All rights reserved
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