Vortex core size in interacting cylindrical nanodot arrays

The effect of dipolar interactions among cylindrical nanodots, with a vortex-core magnetic configuration, is analyzed by means of analytical calculations. The cylinders are placed in a N x N square array in two configurations - core oriented parallel to each other and with antiparallel alignment between nearest neighbors. Results comprise the variation in the core radius with the number of interacting dots, the distance between them and dot height. The dipolar interdot coupling leads to a decrease (increase) of the core radius for parallel (antiparallel) arrays

Río textil sobre la calle de participantes en la EXPO 2008 de Zaragoza

Tensile fabric structures offer possibilities for the solution of urban problems which no other type of structure permits. In the Expo Zaragoza 2008 site (Saragossa, Spain) we have designed a 400 metre-long structure that has turned out to be one of leading attractions of the event. It consists of thirteen pieces of torical surface that twist and turn at a height of 17 metres, taking on the appearance of a river. Technically, it includes some advances in structural geometry that are described in this paper. Artistically, it stands out due to its formal decoration.La arquitectura textil ofrece unas posibilidades para resolver problemas urbanos que ningún otro tipo permite. Para la EXPO 2008 en Zaragoza (España) diseñamos una pieza de 400 m de longitud que ha resultado ser uno de los atractivos de la muestra. Consiste en trece módulos de superficie tórica que serpentea a 17 m de altura tomando el aspecto de un río. Técnicamente hace algunas aportaciones en geometría estructural que se describen y, artísticamente, destaca por su decoración formal