Utiliser les sédiments lacustres lors d’une vidange de barrage est un moyen d’enrichir le sol dans contexte agropastoral montagne. A partir expérience menée Alpes françaises du Nord (barrage Mont Cenis), deux mélanges grainiers, dont l’un avec des semences sauvages d’origine locale, ont été testés selon modalités reconstitution (deux sédiments, compost et fumier). Cinq années suivi végétation d...

The classic definition of preemptive analgesia requires 2 groups of patients to receive identical treatment before or after incision or surgery. The only difference between the 2 groups is the timing of administration of the drug relative to incision. The constraint to include a postincision or postsurgical treatment group is methodologically appealing, because in the presence of a positive res...

The ability of sensor nodes to enter a low power sleep mode is very useful for extending network longevity. We show how adversary nodes can exploit clustering algorithms to ensure their selection as cluster heads for the purpose of launching attacks that prevent victim nodes from sleeping. We present two such attacks: the barrage attack and the sleep deprivation attack. The barrage attack bomba...

While construction of the Aswan High Dam (AHD) has stopped concurrent flooding events, River Nile is still subject to low intensity flood waves resulting from controlled release of water from the dam reservoir. Analysis of flow released from New Naga-Hammadi Barrage, which is located at 3460 km downstream AHD indicated an increase in magnitude of flood released from the barrage in the past 10 y...

Peer-to-peer networks have emerged as a relevant architecture for executing scientific computations. However, this kind of networks poses several problems. This thesis addresses the problem of data storage in a peer-to-peer architecture. We consider several distinct behaviors of the participating nodes. To deal with this variety, we use the BAR model, that comprises byzantine, rational, and alt...

Sampling of three sites on the upper Tongariro River was carried out in summer (January) 1996 to evaluate impacts of the Mt Ruapehu eruption and subsequent flushings of accumulated sediment from behind Rangipo Barrage on substrate, periphyton, invertebrates and blue duck (Hymenolaimus malacorhynchos) diet. Levels of sand and gravels increased markedly in summer 1996 in blue duck feeding habitat...