Thanks for all responses.   
      
   Now I wonder if ANN is simulating biological neurons as stated. Since   
   generally different kind of substances has different kinds of nature;   
   so features of different system cannot be simulated using same   
   mechanism.   
      
   [ comp.ai is moderated ... your article may take a while to appear. ]   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)