1. Dir. of Concrete Res., Furnas Electric Power Lab., Goiânia, Brazil.
2. Sr. Engr., Furnas Electric Power Lab., Goiânia, Brazil.
3. Dir. of Civ. Engrg. Res., Furnas Electric Power Lab., Goiânia, Brazil.
4. Prof., Dept. of Civ. and Envir. Engrg., Univ. of California, Berkeley, CA 94720.