1. Departamento de Física Teórica e Experimental
2. Universidade Federal do Rio Grande do Norte
3. 59078-970 Natal
4. Brazil
5. Institute of Structural Mechanics
6. Bauhaus-Universität Weimar
7. D-99423 Weimar
8. Germany
9. Chemical Engineering Department
10. Carnegie Mellon University
11. Pittsburgh
12. USA
13. College of Civil Engineering
14. Tongji University
15. Shanghai 20092
16. PR China
17. Chair of Computational Mechanics