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The Nature of the Emporium

  • I (a science writer) wondered aloud if scientists had tattoos of their science. The answer was yes, and this site is the evidence. I'll be adding a new tattoo every day until I run out (if that day ever comes). If you want to share your own scientific ink, send it to me with some explanation.

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April 29, 2008

Tagged

RfidPaul writes, "I have a degree in Computer Science, and I work with RFID (or at least I did till recently)." On his Livejournal blog, he adds, "For the curious, this is an Alien Technology's European model Gen 1 Squiggle RFID tag. It's actually copper in color and about six centimetres long. I scanned it and blew it up to a bit over twice it's original size, and changed its color to black."

Carl: RFID stands for radio frequency identification. RFID tags, which are embedded in many of the products sold today in stores, are programmed to store information about them. To get the information, you point an RFID reader at the tag and release a burst of radio waves. The energy from the waves powers up the tag, which then sends back a signal of its own. Paul's RFID tattoo says a lot about him now, but, if he wanted, it could say a lot more. Maybe too much.

February 25, 2008

God, The Void, and A Tattoo

Binary_name
Helen writes, "I am getting married soon, and I wanted to get a tattoo to commemorate who I was before, something to remember my old name (as I am going to take my future husband's surname when I get married), but I also wanted it to be a secret. So this is what I got..."

Carl: Helen wrote her name in ASCII, the lingua franca of computers. Before ASCII was developed in the 1960s, computers often had no way to send text to one another, with dozens of different systems for representing letters and numbers. Even after ASCII was created, it didn't become common until 1981, when IBM used it for the first personal computers. Now ASCII is ubiquitous--a rare thing for such an old computer technology.

But Helen's hidden name has roots that reach much further back than the Kennedy administration--centuries, in fact. ASCII is a binary code, which can be represented easily by an electric current flipping between two levels, or, numerically, as a string of 1s and 0s. Letters, numbers, and symbols can be represented in ASCII by an eight-digit number. Instead of the base-10 system we are all familiar with, this is a base-two number. (So 3 can be represented by 11 [2+1], for example.) The power of binary codes was understood long ago. The I Ching, for example, is a series of symbols built up from solid and broken bars. In Western mathematics, the father of binary codes was Gottfried Leibniz (1646-1716). Leibniz recognized that turning numbers into binary made them extremely simple to handly mathematically. In fact, he speculated, you could build a machine that would do math based on binary numbers by sifting marbles through slots--a dream of the computers that would come centuries later.

But Leibniz saw a deeper meaning in the binary. "One is enough to derive everything from nothing," he wrote. To Leibniz, 0 represented the void, and 1 represented God. Only by translating nature into binary numbers did Leibniz believe that we attain perfect knowledge of the divine, by seeing its underlying reality and beauty. It was no coincidence that seven--as in the seventh day of creation, when all was created--is 111.

To Leibniz, I'd imagine, a binary code tattoo would not say what we once were, but what will forever be.

(For those of you who want to decode Helen's surname, here's a handy converter.)

February 17, 2008

Control-Alt-Delete

Controlaltdelete"Let's not forget the computer scientists! I have a ying yang on one shoulder to remind me to keep a balance in all things in life. I have this on the other shoulder to remind me that sometimes things get fubar and you need to reboot." --Chaim

Y combinator

Y_combinator"I don't quite have a science tattoo, but I have a math tattoo. That's close enough, right?

"Now, for the explanation. This is a formula called the Y Combinator. It is a fixed-point combinator in the lambda calculus and was discovered by Haskell Curry, a rather prolific mathematician and logician whose work helped start Computer Science.

"What this formula does is calculates the fixed point of a function, which in turn allows for recursion by calling on that fixed point; recursion is perhaps the single most important concept in Computer Science. Being a computer scientist and a mathematician, this formula is very important to me and represents the innate beauty of computer science and mathematical logic." --Mark

[Note from Carl: Math is most welcome at the Emporium]

Binary

Binary_code"I hope computer science counts"--Robert Newsom
Flickr source/


Algorithm

AlgorithmMithras writes, "Pinkhaired Girl, a CS Ph.D. student, has this tattoo."

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