Digital Ecosystems Third International Conference, OPAALS 2010, Aracuju, Sergipe, Brazil, March 22-23, 2010, Revised Selected Papers - Antonio Basile Colugnati, Fernando; Lopes, Lia Carrari Rodrigues; Barretto, Saulo Faria Almeida (Springer Berlin Heidelberg : Imprint: Springer, 2010)