1. Spanish Research Council
2. CSIC-INCAR
3. Fco Pintado Fe 26
4. 33011 Oviedo
5. Spain
6. Carnegie Mellon Univ.
7. Depts. of Eng. & Pub Policy and Mech. Eng.
8. Pittsburgh
9. USA
10. ETH Zurich
11. Dept. of Mechanical and Process Eng. Sonneggstrasse 3
12. 8092 Zurich
13. Switzerland
14. MIT Energy Initiative
15. Room E19-370L
16. Cambridge