The citrus leafminer, Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae), is a world-wide pest of citrus (Heppner 1993) described originally in India (Stainton 1856). In the USA, it was initially found in Homestead, Florida and parts of Dade, Broward and Collier counties in 1993 (Heppner 1993). Its distribution is now widespread across Florida in citrus-growing regions, and is spread...

Informatics approaches play an increasingly important role in the design of new materials. In this work we apply unsupervised statistical learning for identifying four framework-type attractors of zeolite crystals in which several of the zeolite framework types are grouped together. Zeolites belonging to these super-classes manifest important topological, chemical and physical similarities. The...

Monolithic fuels are the most promising candidate for a next generation of high-density research reactor fuels. If successfully developed, the remaining HEU-fueled reactors in the world could presumably be converted to low-enriched fuel — and the use of highly enriched uranium in the civilian nuclear fuel cycle eventually terminated. The most challenging type of reactors to convert are single e...

Si bien la historia está plagada de conflictos y enfrentamientos entre pueblos entidades políticas, lo cierto es que vía pacífica o no violenta resolución ha existido siempre, conviviendo solapándose con bélica violenta, y, por tanto, constituye una realidad histórica merece ser estudiada. En esta ocasión hemos analizado las fuentes Spania tardoantigua visigoda (ss. V-VII) en busca voces testim...

A simple and systematic approach to the design of neural networks for combinato rial op t imization is present ed in this paper. This approach is based on compe t it ion among the neurons of a network. Our approach relies on the use of simple heuristics in network design . The act ivat ion rul e govern ing neuron be havior is derived by breaking down the global constraints for a problem into lo...