Google announced on Friday that it is buying online advertising firm DoubleClick for $3.1 billion.

The Internet search colossus will combine DoubleClick’s technology with its proven advertising platform.

Google and DoubleClick, which is based in New York City, will provide an efficient way to manage both search and display ads online, according to Google chief executive Eric Schmidt.

SET was developed by David G. Andersen, a computer scientist and Michael Kaminsky (Intel Research Pittsburgh). SET stands for “Similarity Enhanced transfer”.

The principle: So far a download can only take place in P2P network, if an identical and complete file is present. SET is to make the download possible if a similar file is present, by identifying parts of the files, those is identical with parts of the file the user needs.

The two researchers are sure that by using SET the number of potential download sources rises enormously and again there is an increase in download speeds. As to how much the download speed rises, depends on the size and the popularity of the desired file. It should be possible to increase speeds from between five per cent right up to five times faster.