Stability of restrictions of cotangent bundles of irreducible Hermitian symmetric spaces of compact type

It is known that the cotangent bundle $\Omega_Y$ of an irreducible Hermitian symmetric space $Y$ of compact type is stable. Except for a few obvious exceptions, we show that if $X \subset Y$ is a complete intersection such that $Pic(Y) \to Pic(X)$ is surjective, then the restriction $\Omega_{Y|X}$ is stable. We then address some cases where the Picard group increases by restriction.Comment: Results and exposition improve

Epidémiologie, clinique et diagnostic des entérites chroniques du chien : construction d'une base de données et étude rétrospective de 93 cas (1995-2001)

Sur les 93 animaux présents dans cette étude 62% sont des mâles, 56% de la population est âgé de moins de quatre ans. Les animaux de races pures semblent plus fréquemment atteints (87% de la population). Les symptômes dominants sont la diarrhée (67% des cas) et les vomissements (59.3 %des cas). 30% des animaux présentent une clinique grave (vomissements fréquents, méléna ou hématémèse). L'anomalie radiographique la plus fréquente est l'iléus. Sur 93.5% des animaux une endoscopie a été réalisée. Au plan macroscopique, 71.4% des duodénums examinés sont modifiés contre 50% des côlons. Au plan histologique, 53% des animaux présentent une entérite lymphoplasmocytaire, 41% une entérite éosinophilique et 6% un type d'entérite différent au niveau duodénal et colique. Des différences entre les deux sous-populations composées des animaux ayant une entérite éosinophilique et ceux ayant une entérite lymphoplasmocytaire sont observées. La médiane d'âge se situe entre 2 et 3 ans pour les formes éosinophiliques ,et entre 8 et 9 ans pour les formes lymphoplasmocytaires. 74% des chiens ayant une hyperéosinophilie sanguine présentent une entérite éosinophilique. Toutefois, 16% des animaux atteints d'entérites lymphoplasmocytaires présentent aussi une hyperéosihophilie sanguine

Robocasting of Single and Multi-Functional Calcium Phosphate Scaffolds and Its Hybridization with Conventional Techniques: Design, Fabrication and Characterization [Allizond V. is the co-corresponding author]

International audienceIn this work, dense, porous and, for the first time, functionally-graded bi-layer scaffolds with a cylindrical geometry were produced from a commercially available hydroxyapatite powder using the robocasting technique. The bi-layer scaffolds were made of a dense core part attached to a surrounding porous part. Subsequently, these bi-layer robocast scaffolds were joined with an outer shell of an antibacterial porous polymer layer fabricated by solvent casting/salt leaching techniques, leading to hybrid ceramic-polymer scaffolds. The antibacterial functionality was achieved through the addition of silver ions to the polymer layer. All the robocast samples, including the bi-layer ones, were first characterized through scanning electron microscopy observations, mechanical characterization in compression and preliminary bioactivity tests. Then, the hybrid bi-layer ceramic-polymer scaffolds were characterized through antimicrobial tests. After sintering at 1300 °C for 3 h, the compressive strengths of the structures were found to be equal to 29 ± 4 MPa for dense samples and 7 ± 4 MPa for lattice structures with a porosity of 34.1%. Bioactivity tests performed at 37 °C for 4 weeks showed that the precipitated layer on the robocast samples contained octacalcium phosphate. Finally, it was evidenced that the hybrid structure was effective in releasing antibacterial Ag+ ions to the surrounding medium showing its potential efficiency in limiting Staphylococcus aureus proliferation during surgery

Evaluation of a generic unidirectional header compression protocol

Header Compression techniques are now widely used in wireless and satellite communications. The main drawback of these techniques is to weaken the transmission against bit error or packet losses. Indeed, a corrupted or missing header can lead to a non-decompression of consecutive packets and then to a disconnection until the reception of a non-compressed packet. The parameters of the header compression system should then be carefully determined. In this paper, we first review the main header compression protocols standardized for a unidirectional link. This analysis allows us to build a simple generic header compression model depending on few parameters characterizing a header compression protocol. The evaluation of this model in cases corresponding to particular applications allows us to draw some first lessons for the use of header compression in Satellite communications

Epidémiologie, clinique et diagnostic des entérites chroniques du chien (construction d'une base de données et étude rétrospective de 93 cas (1995-2001))

TOULOUSE3-BU Santé-Centrale (315552105) / SudocTOULOUSE-EN Vétérinaire (315552301) / SudocSudocFranceF