is presently working on evolutionary electronics at NASA JPL here but we're still talking to him!
Ricardo visited Sussex for most of his PhD work resulting in several papers and the thesis "Synthesis of Electronic Circuits Through Artificial Evolutionary Systems". (Doctoral Thesis, Catholic University of Rio, Electric Engineering Department, April, 15, 1999, in portuguese.)
Most of these publications can be downloaded from his home University: ICA PUC Rio publications.
Some can also be obtained from the NEC ResearchIndex: