Here is a link for some useful presentations and seminar topics on Telecommunications, mobile communication, networking of computers etc..
http://www.tenet.res.in/Publications/Research/index.php
Very useful for making good presentations on rural networking, its scope in india, network management and protocols and voice/video coding.
This site has very useful research papers on the above topics, especially useful for B.Tech,B.E ECE students.
For other topics, click below:
http://www.tenet.res.in/Publications/Presentations/index.php
i think article writing still hasn't helped my blogging skills.