A Methodology for Quality Assessment in Collaborative Score Libraries

International audienceWe examine quality issues raised by the development of XML-based Digital Score Libraries. Based on the authors' practical experience, the paper exposes the quality shortcomings inherent to the complexity of music encoding, and thelack of support from state-of-the-art formats. We also identify the various facets of the ``quality'' concept with respect to usages and motivations. We finally propose a general methodology to introduce quality management as a first-level concern in the management of score collections, and an initial taxonomy of quality problems based on real use cases

Rôle de l éducation thérapeutique dans l efficacité des traitements des désordres du métabolisme phosphocalcique chez le patient hémodialysé (étude observationnelle au centre d hémodialyse du CHU d Angers)

ANGERS-BU Médecine-Pharmacie (490072105) / SudocSudocFranceF

Influence des UV dans le vieillissement des bitumes modifiés par un élastomère

Laboratory methods for simulating the short term and long term ageing occuring during the service life of neat and polymer modifed bitumens in a pavement are standardized but none of them takes into account the influence of UV radiations. If the impact of thermal ageing on the degradation of SBS elastomers in bitumens has been extensively studied, there is not studies dealing with the photo-oxidation of these copolymers in a bituminous matrix. So, the aim of this study was to investigate, by FTIR spectrometry and SEC chromatography, whether the architecture of elastomers (linear or radial) might have an influence on their ageing by UV radiation in a same bituminous matrix. The results show that the elastomers oxidation kinetic does not depend on their architecture unlike the disappearance kinetic of trans-butadiene double bond. But, when putted into the same base bitumen, the two copolymers display exactly the same oxidation kinetic and the same decreasing kinetic of trans-butadiene double bond. This study has permit to highlight that inside the bituminous matrix, the elastomers architecture does not influe on its degradation when submitted to UV radiation and, and a protection of the elastomers by the studied bitumen towards UV radiation

Influence des rayons UV sur le vieillissement de liants bitumineux : comparaison avec une expérimentation de terrain

Le vieillissement des liants bitumineux est, en partie, responsable des dégradations de leurs propriétés physiques et mécaniques. Actuellement, les méthodes de laboratoire normalisées simulant le vieillissement à court terme (RTFOT) et à long terme (PAV) ne tiennent pas compte de l'influence des rayonnements UV du soleil. Afin d'expliquer les divergences observées entre les simulations de laboratoire et le vieillissement sur route, cette article décrit l'utilisation d'un appareillage, conçu pour le vieillissement des peintures, pour évaluer l'influence de la structure d'un élastomère et de la nature de la base bitume et, pour comparer le vieillissement dû à l'exposition UV en laboratoire aux méthodes normalisées et au vieillissement in situ. Le vieillissement a été suivi par l'évolution des groupements carbonyle déterminés par spectrométrie IRTF

Influence des UV dans le vieillissement des bitumes modifiés par un élastomère

Laboratory methods for simulating the short term and long term ageing occuring during the service life of neat and polymer modifed bitumens in a pavement are standardized but none of them takes into account the influence of UV radiations. If the impact of thermal ageing on the degradation of SBS elastomers in bitumens has been extensively studied, there is not studies dealing with the photo-oxidation of these copolymers in a bituminous matrix. So, the aim of this study was to investigate, by FTIR spectrometry and SEC chromatography, whether the architecture of elastomers (linear or radial) might have an influence on their ageing by UV radiation in a same bituminous matrix. The results show that the elastomers oxidation kinetic does not depend on their architecture unlike the disappearance kinetic of trans-butadiene double bond. But, when putted into the same base bitumen, the two copolymers display exactly the same oxidation kinetic and the same decreasing kinetic of trans-butadiene double bond. This study has permit to highlight that inside the bituminous matrix, the elastomers architecture does not influe on its degradation when submitted to UV radiation and, and a protection of the elastomers by the studied bitumen towards UV radiation

Ageing by UV radiation of an elastomer modified bitumen

Laboratory methods to simulate the short- and long-term ageing occuring during the service life of pure and polymer modified bitumens in a pavement are standardized but none of them takes into account the influence of UV radiations. If the impact of thermal ageing on the degradation of SBS elastomers in bitumens has been extensively studied, there is not study dealing with the photo-oxidation of these copolymers in a bituminous matrix. So, the aim of our study was to investigate, by FTIR spectrometry and SEC chromatography, whether the architecture of elastomers (linear or radial) might have any influence on their ageing by UV radiation in a bituminous matrix. The results show that the elastomers oxidation kinetic, unlike the disappearance kinetic of trans-butadiene double bond, does not depend on their architecture. But, when putted into the same base bitumen, the two copolymers show exactly the same oxidation kinetic and the same decreasing kinetic of trans-butadiene double bond. So, this study has revealed that inside the bituminous matrix, on the one hand, the elastomers architecture does not influence on its degradation when submitted to UV radiation and, on the other hand, there is a "protection" of the elastomers by the studied bitumen towards UV radiation

Gioqoso, an Online Quality Evaluation Tool for MEI Scores

International audienc

High-resolution multi-parametric quantitative magnetic resonance imaging of the human cervical spinal cord at 7T

International audienceQuantitative MRI techniques have the potential to characterize spinal cord tissue impairments occurring in various pathologies, from both microstructural and functional perspectives. By enabling very high image resolution and enhanced tissue contrast, ultra-high field imaging may offer further opportunities for such characterization. In this study, a multi-parametric high-resolution quantitative MRI protocol is proposed to characterize in vivo the human cervical spinal cord at 7T. Multi-parametric quantitative MRI acquizitions including T1, T2(*) relaxometry mapping and axial diffusion MRI were performed on ten healthy volunteers with a whole-body 7T system using a commercial prototype coil-array dedicated to cervical spinal cord imaging. Automatic cord segmentation and multi-parametric data registration to spinal cord templates enabled robust regional studies within atlas-based WM tracts and GM horns at the C3 cervical level. T1 value, cross-sectional area and GM/WM ratio evolutions along the cervical cord were also reported. An original correction method for B1(+)-biased T1 mapping sequence was additionally proposed and validated on phantom. As a result, relaxometry and diffusion parameters derived from high-resolution quantitative MRI acquizitions were reported at 7T for the first time. Obtained images, with unmatched resolutions compared to lower field investigations, provided exquisite anatomical details and clear delineation of the spinal cord substructures within an acquisition time of 30min, compatible with clinical investigations. Regional statistically significant differences were highlighted between WM and GM based on T1 and T2* maps (p\textless10(-3)), as well as between sensory and motor tracts based on diffusion tensor imaging maps (p\textless0.05). The proposed protocol demonstrates that ultra-high field spinal cord high-resolution quantitative MRI is feasible and lays the groundwork for future clinical investigations of degenerative spinal cord pathologies