La métacognition pour améliorer la coopération lors de la pratique du handball à l'école primaire

Dans ce mémoire en Éducation Physique et Sportive, nous avons réalisé une expérimentation en handball auprès de vingt-quatre élèves de CM2. Il s'agissait de montrer en quoi la métacognition pourrait permettre un meilleur apprentissage de la notion de coopération. Nous avons pu observer celle-ci durant une séquence d'enseignement de six séances à l'aide des critères de passes et de démarquage principalement. Deux groupes nous ont permis de comparer les résultats : avec et sans métacognition. Nous avons également mis en place une évaluation diagnostique en début de séquence et un tournoi final en fin de séquence afin d'évaluer la progression des élèves

Potential for Physical Vulnerability to Sea Level Rise and Flooding

Social Vulnerability Panelists, moderated by Lynda Butler, will share their perspectives and analyses on the intersections among race, law, science and environmental justice in community vulnerability assessments

Genetic determinism of sensitivity to Corynespora cassiicola exudates in rubber tree (Hevea brasiliensis)

An indirect phenotyping method was developed in order to estimate the susceptibility of rubber tree clonal varieties to Corynespora Leaf Fall (CLF) disease caused by the ascomycete Corynespora cassiicola. This method consists in quantifying the impact of fungal exudates on detached leaves by measuring the induced electrolyte leakage (EL%). The tested exudates were either crude culture filtrates from diverse C. cassiicola isolates or the purified cassiicolin (Cas1), a small secreted effector protein produced by the aggressive isolate CCP. The test was found to be quantitative, with the EL% response proportional to toxin concentration. For eight clones tested with two aggressive isolates, the EL% response to the filtrates positively correlated to the response induced by conidial inoculation. The toxicity test applied to 18 clones using 13 toxinic treatments evidenced an important variability among clones and treatments, with a significant additional clone x treatment interaction effect. A genetic linkage map was built using 306 microsatellite markers, from the F1 population of the PB260 x RRIM600 family. Phenotyping of the population for sensitivity to the purified Cas1 effector and to culture filtrates from seven C. cassiicola isolates revealed a polygenic determinism, with six QTL detected on five chromosomes and percentages of explained phenotypic variance varying from 11 to 17%. Two common QTL were identified for the CCP filtrate and the purified cassiicolin, suggesting that Cas1 may be the main effector of CCP filtrate toxicity. The CCP filtrate clearly contrasted with all other filtrates. The toxicity test based on Electrolyte Leakage Measurement offers the opportunity to assess the sensitivity of rubber genotypes to C. cassiicola exudates or purified effectors for genetic investigations and early selection, without risk of spreading the fungus in plantations. However, the power of this test for predicting field susceptibility of rubber clones to CLF will have to be further investigated. (Résumé d'auteur

THE CHANGING PACE OF INSULAR LIFE : 5000 YEARS OF MICROEVOLUTION IN THE ORKNEY VOLE (MICROTUS ARVALIS ORCADENSIS)

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