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Comment Re:compare the files (Score 1) 284

I'm pretty sure it's a simple task to use imagemagick and bash/python/language of choice to make a map of binary differences comparing each image with the results file and with each of the other. Crude attempts to copy the result or another students image should be fairly easy to spot. Also, watermarks or lowering the resolution on the final results file might also help.

Comment Image sharing (Score 5, Informative) 286

I use facebook,g+ and twitter, mostly for maintaining a presence rather than posting personal stuf. But I've discovered that google+ is quite good for sharing images with family and closer friends. The fact that you can can share things with people that doesn't have a g+ account just by their e-mail address means that I can show them whats happening in my life from a single place.

Comment Re:Don't be a jerk (Score 1) 64

I'm no sociologist, but... Social groups with something in common usually has unwritten rules that can be summarized as "Don't be a jerk". As the community grows and more people, and therefore more jerks, join. The social control in the group loosens and a bigger need for a formalized set of rules emerge. I congratulate the OSHW movement for, by this article, taking the first steps towards formalizing their rules, and becoming a more jerk friendly (or unfriendly depending on how you see it) community.

Comment Re:How much would better cooling cost? (Score 1) 303

Well, the stirling engine requires a large temperature difference between a hot and cold medium. And will essentially need some kind of cooling source to operate. Stirling engines usually has a maximum efficiency of ~40% (number grabbed from the back of my head, don't take it too seriously) wich means that more than 60% of the heat energy will end up heating the cooling medium. Also, the mechanical energy generated by the stirling engine will turn into heat sooner or later due to the grim laws of thermodynamics.
Math

Submission + - Computers Unlock Secrets Of Ancient Script. (sciencedaily.com) 1

bagsta writes: Four-thousand years ago, an urban civilization lived and traded on what is now the border between Pakistan and India. During the past century, thousands of artifacts bearing hieroglyphics left by this prehistoric people have been discovered. Today, a team of Indian and American researchers are using mathematics and computer science to try to piece together information about the still-unknown script.

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