The Mead-Markus sandwich beam model with shear damping is shown to be null controllable modulo a one dimensional state in an arbitrarily short time. The moment method is used to obtain this result.

A water budget analysis shows that under current conditions there is a 10% chance live storage in Lakes Mead and Powell will be gone by about 2013 and a 50% chance it will be gone by 2021 if no changes in water allocation from the Colorado River system are made. This startling result is driven by climate change associated with global warming, the effects of natural climate variability, and the ...

Ni olas Durand Laboratoire d'Optimisation Globale Centre d'Etudes de la Navigation A erienne 7, av Edouard Belin 31055 Toulouse Cedex Fran e durand re her he.ena .fr tel: (33) 562 17 40 54 Jean-Mar Alliot Laboratoire d'Optimisation Globale Centre d'Etudes de la Navigation A erienne 7, av Edouard Belin 31055 Toulouse Cedex Fran e alliot re her he.ena .fr tel: (33) 562 17 41 24 Abstra t It is usu...

Regarding the high cost of PMU units, optimal placement and minimizing of their numbers are of great importance. Also, this paper proposes a new procedure for determining the optimal placement and less numbers of PMUs in distribution network based on the best state estimation criterion. For DSE solution, combination of Nelder-Mead (NM) simplex search and Ant Colony Optimization (ACO) algorithm ...