Institute of Mathematics and Applications 2nd Floor, Suryakiran Buildings Sahid Nagar, Bhubaneswar, Orissa, Pin 751007. Ph (0674) 2542164,2540604 E-mail: "Dr. Swadhinananda Pattnayak" <swadhyn@yahoo.com>          "Sasmita Panda"   <sasmita_dhana@rediffmail.com>          "Sandip Dasverma" <sandip.kumar.dasverma@gmail.com>                                                              "Dillip Kumar Mishra" <mishra.dillip@gmail.com>