September 2002
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30          
Aug   Oct


pages I visit regularly

The Aardvark Speaks

Aquinas

The Bleat

boing boing

Caveat Lector

Clark Hornbell

Crazy Apple Rumors

The Disseminary

Eeksy-Peeksy

Fragments

Fury

A Girl Named Bob

harrumph! still crazy!

Jonathon Delacour

Oblivio

ordinary morning

Pax Nortona

rabbit blog

reverend jim

runs with scissors

Russell Beattie

Ruzz

sour mash with a twist

Sainteros

Samurai Panda

Seb's Open Research

Time's Shadow

The Universal Church of Cosmic Uncertainty

Visible Darkness


Click here to send an email to the editor of this weblog.  Write to me!


more posts

Monday, September 2, 2002    permalink
Circuit to Computer: 'Come in, please!'

Using a computer-based genetic algorithm (selecting for an attribute after "mutating" variables), scientists trying to evolve a oscillator circuit managed to create one that turned into a radio receiver... serving up a nearby computer's signal as output.

Paul Layzell and Jon Bird at the University of Sussex in Brighton applied the program to a simple arrangement of transistors and found that an oscillating output did indeed evolve.

But when they looked more closely they found that, despite producing an oscillating signal, the circuit itself was not actually an oscillator. Instead, it was behaving more like a radio receiver, picking up a signal from a nearby computer and delivering it as an output.

In essence, the evolving circuit had cheated, relaying oscillations generated elsewhere, rather than generating its own.

And despite not being explicitly selected for, the circuit had also grown itself an "antenna."

This just tickles me.

It's somehow anxiety-provoking too. (Sometimes nature doesn't ask, "Would you like a side of fries with that?" ~ sometimes you just get the Meal Deal automatically.)

4:51:55 PM    please comment []



© Copyright 2002 Pascale Soleil.
Last updated: 11/10/02; 3:18:30 PM.
Comments by: YACCS
Click to see the XML version of this web page.