Guide to Concrete Overlay Solutions, 2007

Despite many successful projects, some public agencies and contractors have been hesitant to use concrete overlays. This lack of confidence has been based on a number of factors, including the misperception that concrete overlays are expensive or difficult to build. This guide will help readers understand concrete overlays and develop confidence in their application. The guide provides the key elements of the six major types of concrete overlays along with specifics on materials, typical sections, and important construction elements.

Le code noir : opéra-comique en trois actes / paroles de M. E. Scribe, musique de M. Clapisson...

Collection : Répertoire dramatique des auteurs contemporains ; N° 212

Solving a concrete sleepers production scheduling by genetic algorithms

PRECON S.A is a manufacturing company dedicated to produce prefabricatedconcrete parts to several industries as rail transportation andagricultural industries.Recently, PRECON signed a contract with RENFE,the Spanish Nnational Rail Transportation Company to manufacturepre-stressed concrete sleepers for siding of the new railways of the highspeed train AVE. The scheduling problem associated with the manufacturingprocess of the sleepers is very complex since it involves severalconstraints and objectives. The constraints are related with productioncapacity, the quantity of available moulds, satisfying demand and otheroperational constraints. The two main objectives are related withmaximizing the usage of the manufacturing resources and minimizing themoulds movements. We developed a deterministic crowding genetic algorithmfor this multiobjective problem. The algorithm has proved to be a powerfuland flexible tool to solve the large-scale instance of this complex realscheduling problem.

L'automate de Vaucanson : opéra-comique en un acte / par M. de Leuven ; musique de M. Luidgi Bordèse...

Collection : Répertoire dramatique des auteurs contemporains ; n° 126

Art de la réglure des registres et des papiers de musique , méthode simple et facile pour apprendre à régler... suivi de l'art de relier les registres... par A.-B. Méguin,...

Collection : Encyclopédie populaire, ou Les sciences, les arts et les métiers mis à la portée de toutes les classes