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Comment: A better explanation (Score 2, Informative) 122

by Leon da Costa (#33817694) Attached to: Visible Light 'X-Ray' Sees Through Solid Objects

Amazing! A friend of mine has done his Ph.D. in exactly this field. He was shining a beam of light right THROUGH an opaque sheet of material (paper, I think) already a few years ago, and published about it in 2008. I think it's pretty much the same idea, from what I understand of it (but keep in mind, I chose the evil path of Business instead of Science, so I have no brain).

Anyway; on his page there's a much better explanation, with cute pictures and all that, of the same idea.

Math

+ - $25,000 question: Is this Turing machine universal

Submitted by Anonymous Coward
An anonymous reader writes "Stephen Wolfram, creator of Mathematica and author of A New Kind of Science, is offering a 25k prize to anyone who can prove or disprove his conjecture that a particular 2-state, 3-color Turing machine is universal. If true, it would be the simplest universal TM, and possibly simplest universal computational system — even simpler than rule 110. The announcement comes on the 5-year anniversary of the publication of NKS, where among other things Wolfram introduced the current reigning TM champion."

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