The preferred way to contact me is by e-mail.
schnorr@inf.ufrgs.br
You can find me in the following address, but make sure you drop me an e-mail first.
Campus do Vale - Sector 4 - Building 43425 - Office 242
Instituto de Informática -- Universidade Federal do Rio Grande do Sul
Caixa Postal 15064 -- CEP 91501-970 Porto Alegre - RS - Brazil