Is RAM completely cleared when you turn off computer after pulling power? [duplicate]

Would there by some way to pull the power instead of conventional shut down, and recover the contents of ram without loading the operating system upon the next start-up? I'm trying to recover files open on an unresponsive Ubuntu live cd.

Update:

I read the paper suggested by Alex and I think that's probably my best bet. Like Dan D said, you don't need liquid nitrogen, the paper itself suggests dust cleaner fluid in those cans to lower the temperature. I'll give it a try and post the results here. If anyone has any suggestions, please let me know.

From what I gathered from the paper, I lower the RAM's temperature to around -50 degrees before cutting power, cut power, boot a modified program supplied by the paper's authors from a USB stick, which then dumps the RAM's contents to the USB.

Solution 1:

The only way that would work is if you had access a very cold liquid such as liquid helium or liquid nitrogen.

Here is a paper on the topic: Lest We Remember: Cold Boot Attacks on Encryption Keys