Index of efficiency for strength-grading machines for solid wood

The settings of strength-grading machine for structural pieces of wood are checked according to the EN 14081 standard. However, different machines have different performances depending on the accuracy of the estimation of the board’s properties, and there is no easy way to compare the efficiency of these machines especially if the machine does not use the same sampling. In this paper, we introduce an index called index of efficiency for grading machines. This parameter is in the range of 0–100% and allows to compare performances of different machines for a given set of grades. The computation of this index is based on the cost matrix method of the EN 14081 and requires to have the size matrix of a setting to be computed

Calcul automatique du Knot Area Ratio appliqué au classement mécanique de sciages de Douglas et d’Epicéa français.

Alors que les premières machines de classement viennent d’être certifiées pour le Douglas français, leurs performances dépassent celles du classement visuel. Il est cependant encore possible d’améliorer leurs résultats. Le Knot Area Ratio est un paramètre caractérisant les nœuds d’un sciage. Jusqu’alors calculé manuellement nous présentons une méthode de calcul automatique à partir de la détection de nœuds d’un scanner optique, ainsi que les résultats de classements mécaniques obtenus

Front Microbiol

Since 2021, 3 variants of concern (VOC) have spread to France, causing successive epidemic waves. To describe the features of Alpha, Delta and Omicron VOC circulation in the Nouvelle-Aquitaine region, France, between February 2021 and February 2022. Data from the three university hospitals (UH) of Nouvelle-Aquitaine were used to describe regional SARS-CoV-2 circulation (RT-PCR positive rates and identified VOC) as well as its consequences (total number of hospitalizations and admissions in intensive care unit). They were analyzed according to the predominant variant and compared with national data. A total of 611,106 SARS-CoV-2 RT-PCR tests were performed in the 3 Nouvelle-Aquitaine UH during the study period. The 37,750 positive samples were analyzed by variant-specific RT-PCR or whole-genome sequencing. In 2021, Alpha VOC was detected from week 5 until week 35. Delta became the most prevalent variant (77.3%) in week 26, reaching 100% in week 35. It was replaced by Omicron, which was initially detected week 48, represented 77% of positive samples in week 52 and was still predominant in February 2022. The RT-PCR positive rates were 4.3, 4.2, and 21.9% during the Alpha, Delta and Omicron waves, respectively. The ratio between intensive care unit admissions and total hospitalizations was lower during the Omicron wave than during the two previous waves due to the Alpha and Delta variants. This study highlighted the need for strong regional cooperation to achieve effective SARS-CoV-2 epidemiological surveillance, in close association with the public health authorities

Chronique de jurisprudence - Droit administratif et droit constitutionnel

International audienc

Chronique de jurisprudence - Droit administratif et droit constitutionnel

International audienc

Chronique de jurisprudence - Droit administratif et droit constitutionnel

International audienc

Chronique de jurisprudence - Droit administratif et droit constitutionnel

International audienc

Chronique de jurisprudence - Droit administratif et droit constitutionnel

International audienc

Chronique de jurisprudence - Droit administratif et droit constitutionnel

International audienc

Chronique de jurisprudence - Droit administratif et droit constitutionnel

International audienc