From: martin[at]yangtze.hku.hk
Date: Thu, 1 Apr 2004 16:45:31 +0800 (HKT)

Dear all,

I would like to consult about how to add two or more dummy atoms in 
Charmm? Actually, I am calculating a system with 2 segments. I would like 
to introduce constant velocity to 1 segment (all the atoms in segment 
move in one direction with same spped). 

How can I do so?

Thank you very much

Martin