The sound barrier for bullet trains remains a challenge due to the piston effect causing compression waves at entry and exit of tunnel. air ahead train nose is compressed, wave propagates through tunnel speed exits with generation micro pressure waves. It gives rise complex pattern comprising & expansion tail leading positive around suction tail. This intended provide exhaustive input prope...

telemedicine has changed the way of health care. it is an indispensable tool in the hands of doctors to accelerate and facilitate the process of data interchange. wireless networks consist of small nodes with communications capabilities. development of wireless networks of telemedicine system is highly demanded since these networks promise a wide range of potential applications. in this paper t...