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Chaotic Computing In Practice
codyhess writes "The Economist published a great article detailing efforts to use Chaos in computing - "Speaking at the American Physical Society's annual March conference, William Ditto of the University of Florida told of his efforts to create a 'chaotic computer'."
Dr. Ditto can create standard logic gates (AND, OR, etc) that output a value according the their chaotic threshhold. Different logic operations can be performed by simply changing the threshhold, making an incredibly flexible computer that can perfom different functions instantaneously."
Nothing new, I've been doing that since Windows 3.11! :)
I was just going to hire really crazy programmers, and change their meds based on what I needed.
... I type in random characters in Google and hit "I feel Lucky".
Google was no help...in translating this article into English.
sarchasm: The gulf between the author of sarcastic wit and the person who doesn't get it.
I first read that as Catholic Computing.
Pearly Gate logic will have to wait a few years yet, I guess.
I am not a physicist, engineer, or scientist (or anything else qualified to answer this) but it seems to me, the simple minded one, that once you start controlling something, it isn't chaotic. I mean- if they are basing decisions on this, then it can't be completely chaotic, can it? How can you derive an AND, OR, etc, from chaos without controlling it (thus negating the chaos). Can someone dumb this down a little for those of us who aren't in the know?
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analog computers of old. IIRC they were used for ballistics calculations and similar by the military.
Here is an example.
Look into what kind of mathematical operations can be realized with multiplying DACs.
Dr. Ditto
Wait...Rush Limbaugh has a Ph.D?
I have discovered a truly marvelous
The way I see it (although I am not a mathematician), the major hurdle to realizing this is the fact that generating random numbers usually results in patterns.
"Teleporting Rodents with D-Cell Battery Displacement" theory -- IgnoramusMaximus (692000)
Reading this article reminds me of the Improbability Drive in the Hitch Hikers Guide to the Galaxy.
The last problem to be solved was to find a perfect source of randomness, which the galaxies best professors had been trying to solve for decades as whole departments had been built up on trying to solve this problem. Then one day, a brilliant student solves the problem by realizing a a cup of hot coffee provides this data. He is immediately awarded the highest Physics prize in the universe, and immediately lynched by his peers for being a smart-ass.
Couple of thoughts:
This isn't quite the same thing as having randomly perturbed input thresholds, which is how neurons work. And, as anyone who's tried it knows, neurons are only about 95% efficient in determining the correct result. It takes a lot of logical processing on top of the neural bitwise decisionmaking to distill the 95% to the 99% or so correct answer rate that constitutes "intelligent thought".
And, they'd better look into real-world noise margin requirements for thresholding electrical switching decisions, or "chaotic" is all their output will ever be.
Chaotic systems are actually quite controlloable in a very interesting way. The key property that makes a chaotic system so unpredictable is divergence -- if two copies of the system differ by delta, that delta will grow exponentially in time (doubling according to a coefficient call the Lyapunov coefficient). Yet, the divergence is never arbitrary. Instead, the divergence in chaotic systems happen within a space called the strange attractor - the diverging trajectories stay within in the attractor zone even as the split from each other.
If you map the strange attractor and nudge the system are the right point of the cycle, you can push the system into what ever mode of behaviro you want. Although you cannot predict the longterm behavior of the chaotic system, you can perturb it periodicaly to stabiize it or rapidlly shift its behavior. Scientists are looking at how to use this chaotic control theory to control unstable systems such as ultrahigh power lasers, manuerable jet aircraft, and heart tissue.
The key controlling a chaotic system is to understand how the chaotic system diverges (the shape of the strange attractor) and use that knowledge to deftly inject perturbations at just the right moment.
Two wrongs don't make a right, but three lefts do.
The only thing I want to know is; are these computers Chaotic Lawful, Chaotic Neutral, or Chaotic Evil?
I hear there's rumors on the Slashdots
this is "self modifying hardware", similar to "self modifying code". but is it fair to call it chaotic? In a chaotic system, the process remains the same but the output varies. In this situation, both the process and the data change over time. Or can a chaotic system also be one where the rules change as well?? Experts??
personally, SMC is a bitch to debug, I can't imaging how one would begin to debug THIS beast...
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We're already seeing quantum computing, as this story is in two places simulataneously. Remember, you saw it here first, and second, on Slashdot.
Yes, digital computers may use analog signals, but the basic operations of a digital computer (AND, OR, XOR, etc.) are fundamentally digital operations. They quantize the analog signals into 1s and 0s, and output quantized signals based on those digital values (of course, with some amount of analog error).
An analog computer does no such thing. If it wants to add two signals, it adds them. In analog. You can do integrals and derivations in analog as well, amongst other things.
A digital computer may have to use analog signals to operate on some level, but that does not make it an analog computer.