Hi Padmaja Patnaik I have got a similar problem a year back....i dont whether it is same....but i got answer from Prof Paolo
Please check this link It may be useful to you http://www.democritos.it/pipermail/pw_forum/2009-April/012446.html with regards ramesh With regards K. Ramesh Kumar Research Scholar Department of Physics IIT-Madras Chennai-600 036 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.democritos.it/pipermail/pw_forum/attachments/20101111/d9cf4817/attachment.htm
