Search results for "RISA"
showing 10 items of 788 documents
Reference tracking control of hypersonic vehicles using switched linear parameter-varying approach
2013
This paper is concerned with the control problem of the air-breathing hypersonic vehicle using switched linear parameter-varying (LPV) systems approach. By linearizing the nonlinear model of the hypersonic vehicle at trim points and dividing the velocity scope into several partitions, a switched LPV model for the underlying systems is derived. With aid of multiple Lyapunov-like functions technique, the controllers ensuring the tracking of given commands of the closed-loop system are designed under the mode-independent and mode-dependent switching logics, respectively. Simulation results for the hypersonic vehicle show the effectiveness of the proposed method and the advantages of the mode-d…
Inscrire les contrats en alternance dans une logique de parcours sécurisé : rapport d'évaluation
2012
Document en ligne sur le site de l'IREDU; Les avantages de l'apprentissage ne doivent pas masquer la réalité de ce mode de formation et les difficultés des jeunes qui peuvent apparaître dès le début du choix de l'alternance, ou au cours de leur cursus, et entraîner un abandon. Une action de tutorat externe et neutre menée par trois Missions locales auprès des apprentis et des employeurs peut contribuer à la sécurisation des parcours d'apprentissage, comme le montre l'expérimentation réalisée durant près de deux ans en Côte-d'Or, une expérience randomisée sous certaines conditions. Les publics ciblés étaient les jeunes entrés dans la vie active par le biais d'un contrat d'apprentissage dans …
Designed biodegradable hydrogel structures prepared by stereolithography using poly(ethylene glycol)/poly(D,L-lactide)-based resins
2010
Designed three-dimensional biodegradable poly(ethylene glycol)/poly(D,L-lactide) hydrogel structures were prepared for the first time by stereolithography at high resolutions. A photo-polymerisable aqueous resin comprising PDLLA-PEG-PDLLA-based macromer, visible light photo-initiator, dye and inhibitor in DMSO/water was used to build the structures. Porous and non-porous hydrogels with well-defined architectures and good mechanical properties were prepared. Porous hydrogel structures with a gyroid pore network architecture showed narrow pore size distributions, excellent pore interconnectivity and good mechanical properties. The structures showed good cell seeding characteristics, and human…
Modélisation d'images agronomiques - application a la reconnaissance d'adventices par imagerie pour une pulvérisation localisée
2009
Plant (crop and weed) identification is a very active field of research in agriculture since the reinforcement of European laws about pesticide applications for a site-specific management of spraying practices. A new crop/weed simulation model was developed to allow the evaluation of crop/weed spatial identification methods from imaging. Considering multiples agronomic parameters – crop location, weed infestation rate, weed spatial distribution – the first step of this model allows the simulation of an infested crop field. Then, in a second step, a world to camera transformation is applied to allow every kind of picture (with or without perspective effect). The validation of this model was …
La riparazione in forma specifica.
2013
Splenic Graulomatosis
2015
Learning objectives Background Findings and procedure details Conclusion Personal information References
Ziegler–Natta catalysts based on vanadium halides: a DFT study
2003
Abstract Ziegler–Natta ethylene insertion into the carbon–metal bond for a number of fragments containing vanadium on different oxidation states as well as the halogen ligands has been studied by means of DFT. It is shown that the complexation and insertion energies are strongly influenced by the charge on the transition metal atom and, to some extent, by the electronegativity of the halogen atom. Complexation energy varies in the range −129 to −159 kJ/mol for charged species and −64 to −77 kJ/mol for neutral ones. Insertion energy follows a similar pattern and ranges from −28 to −62 and −82 to −100 kJ/mol, respectively. The calculated values are compared with the experimental results and d…
Phylogeny and Taxonomy of the Risa Genus-group (Diptera: Ephydridae), with Description of a New Genus from Australia
2023
The systematic and somewhat controversial history of Risa Becker is presented, and its relationship with Diasemocera Bezzi (tribe Psilopini, Ephydridae) is documented by morphological evidence and an association with host plants in the family Amaranthaceae. The tribe Risini Papp (as Risidae) is synonymized with Psilopini Cresson. Notorisa gen. nov., from Australia, is described (type species: Notorisa mcalpinei sp. nov.; Australia. Victoria: Big Desert National Park, near Lake Hindmarsh; 36°03.7'S 141°54.8'E). Achaetorisa Papp is retained as a subgenus within Risa and includes five species, including two new combinations: Risa brevicornis (Papp) comb. nov., Risa salsolae (Mathis & Zatwa…
Des compétences artistiques aux compétences professionnelles
2010
Les écoles supérieures d'art certifient des qualifications complexes et aux devenirs imprédictibles. Les études sur l'insertion professionnelle des diplômés des écoles d'art (DNSEP) menées jusqu'ici se sont attachées à décrire la qualité de leur insertion. Dans cette recherche, la réflexion porte sur la valorisation des compétences acquises en formation dans le contexte d'exercice professionnel. Les diplômés des promotion 2003 et 2005 occupant un emploi artistique au moment de l'enquête sont ainsi réinterrogés 4 à 6 ans après leur sortie de formation.