141 research outputs found
Plastic packaging sector: a contemporary and crucial challenge
Recently, the packaging sector started to aim at the reduction of the ecological impact of one of its main materials: plastic. Pictures of plastic marine litter among others democratized bad reputation of this material. Hence, alternatives and bans started to appear. However, plastic displays various important properties for content protection, which are difficult to reach by using alternative materials at industrial scale. In the past, several materials were supposed to replace synthetic plastic in packaging, including polylactic acid, without success. The usages of plastic packaging make recycling complicate, and thermal recovery plants and landfills are still widely used to process these plastic wastes. Nevertheless, innovations have the potential to change this sector. Among materials that could replace plastic, nanocellulose appears as a solid competitor. Regarding recycling technologies, the recent discoveries of plastic enzymatic degradation could solve contamination and diversity problems encountered with plastic packaging wastes
Locally-adapted convolution-based super-resolution of irregularly-sampled ocean remote sensing data
Super-resolution is a classical problem in image processing, with numerous
applications to remote sensing image enhancement. Here, we address the
super-resolution of irregularly-sampled remote sensing images. Using an optimal
interpolation as the low-resolution reconstruction, we explore locally-adapted
multimodal convolutional models and investigate different dictionary-based
decompositions, namely based on principal component analysis (PCA), sparse
priors and non-negativity constraints. We consider an application to the
reconstruction of sea surface height (SSH) fields from two information sources,
along-track altimeter data and sea surface temperature (SST) data. The reported
experiments demonstrate the relevance of the proposed model, especially
locally-adapted parametrizations with non-negativity constraints, to outperform
optimally-interpolated reconstructions.Comment: 4 pages, 3 figure
Boundary stabilization of the linear elastodynamic system by a Lyapunov-type method
We propose a direct approach to obtain the boundary stabilization of the isotropic linear elastodynamic system by a “natural" feedback; this method uses local coordinates in the expression of boundary integrals as a main tool. It leads to an explicit decay rate of the energy function and requires weak geometrical conditions: for example, the spacial domain can be the difference of two star-shaped sets
The Kasimir Project: Knowledge Management in Cancerology
Colloque avec actes et comité de lecture. internationale.International audienceThis paper describes the Kasimir project which aim is the knowledge management for the cancer treatment and which gathers researchers in computer science and in ergonomics, experts in cancerology and an association federating physicians from Lorraine involved in cancerology. For each cancer localisation, the treatment is based on a protocol. The system Kasimir-RBR implements this protocol. The system Kasimir-CBR will implement adaptations of the protocol for ``non-standard cases''. The third part of the project is to study how protocol adaptations can lead to evolutions of the protocol
Radiothérapie exclusive du cancer localisé de la prostate (technique conventionnelle et technique conformationnelle)
NANCY1-SCD Medecine (545472101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF
Le traitement des malformations arterio-veineuses, des schwannomes vestibulaires, des méningiomes et des métastases cérébrales par radiochirurgie (l'expérience nancéienne de 1992 à 1999)
NANCY1-SCD Medecine (545472101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF
Intérêts de la radiothérapie avec modulation d'intensité dans les cancers de la tête et du cou
NANCY1-SCD Medecine (545472101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF
Radiothérapie conformationnelle des carcinomes bronchiques non à petites cellules ( étude rétrospective à propos de 80 patients traités au centre Alexis Vautrin )
La radiothérapie externe des carcinomes bronchiques non à petites cellules (CBNPC) a longtemps été considérée comme un traitement palliatif. La radiothérapie conformationnelle, permet de délivrer une dose élevée d'irradiation au volume tumoral tout en épargnant au maximum les tissus sains. Une première partie consistera en un état des lieux de l'épidémiologie des CBNPC et des différents traitements (chirurgie,radiothérapie, chimiothérapie) existants. Dans une seconde partie, nous rapporterons l'expérience du Centre Alexis Vautrin en matière de radiothérapie conformationnelle des CBNPC, sur une série rétrospective de 80 patients. Avec un suivi médian de 24,9 mois, les médianes de survie globale et de survie spécifiques sont de 13,6 et 14,3 mois respectivement. La survie est nettement influencée par la technique de radiothérapie : 25 mois avec une technique " moderne ", contre 12,2 mois en cas de radiothérapie conformationnelle réalisée avec une balistique " classique ", p=0,0005. Enfin, une troisième partie étudiera les apports potentiels de la modulation d'intensité en matière de couverture du volume tumoral et d'épargne des tissus sains. Plusieurs plans de traitement seront comparés dans le but de déterminer une balistique type pour le développement futur de la radiothérapie conformationnelle par modulation d'intensité.NANCY1-SCD Medecine (545472101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF
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