can you give me a site/sites where i can see a lot of recent technological frontiers?

Answer 1

There is so much research being conducted into all sorts of technology that it might be easier to start with a few sites that give a general overview of recent developments within a specific sector, then Google some of the keywords you will find there.

This may be a good starting point. This article focusses on Consumer Electronics.

http://www.pcmag.com/article2/0,1895,2064698,00.asp

The following page has a history of, and the latest developments in Fuel Cell technology.

http://en.wikipedia.org/wiki/Fuel_cell