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Puzzle Games (Games)

Submission + - Old islamic tile patterns show modern math insight

arbitraryaardvark writes: "Reuters reports Medieval Muslims made mega math marvel.
Tile patterns on middle eastern mosques display a kind of quasicrystalline effect that was unknown in the west until rediscovered by Penrose in the 1970s.
"Quasicrystalline patterns comprise a set of interlocking units whose pattern never repeats, even when extended infinitely in all directions, and possess a special form of symmetry."
It isn't known if the mosque designers understood the math behind the patterns.
page 2 of story."
Security

Submission + - The Ten Most Frequently-Guessed Passwords

darkreadingman writes: "IT people often create their own security problems by choosing administrative passwords that are easily hacked. Here's a list of hackers' ten most frequently-guessed passwords, along with some suggestions on better ways to create and maintain strong passwords. http://www.darkreading.com/document.asp?doc_id=117 988&WT.svl=news1_1"

Comment Re:Girls only (Score 2, Informative) 233

The reason why it's just girls is because the gene is carried on the X chromosome- therefore, girls can carry a functional copy on the other X chromosome, but most guys (not counting Klinefelter types) don't have that option. Males who inherit the bad X die in infancy. I'm guessing that people figured out their deceased baby boys had the RTT problem via genetic testing. See 'Gender and Rett Syndrome' here- http://en.wikipedia.org/wiki/Rett_syndrome .

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