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Posts Tagged ‘Laws of Physics

You ain’t got a thing if you ain’t got that swing…

source: CalTech

The identification of scientific laws has historically been a painfully long– and innately human– process of pattern recognition.  It took observers centuries to distill the laws of mechanics, for instance.  Now, as Science reports, researchers at Cornell have take a stab at using computing power to automate the process… and have some astoundingly-encouraging results:

For centuries, scientists have attempted to identify and document analytical laws that underlie physical phenomena in nature. Despite the prevalence of computing power, the process of finding natural laws and their corresponding equations has resisted automation. A key challenge to finding analytic relations automatically is defining algorithmically what makes a correlation in observed data important and insightful. We propose a principle for the identification of nontriviality. We demonstrated this approach by automatically searching motion-tracking data captured from various physical systems, ranging from simple harmonic oscillators to chaotic double-pendula. Without any prior knowledge about physics, kinematics, or geometry, the algorithm discovered Hamiltonians, Lagrangians, and other laws of geometric and momentum conservation. The discovery rate accelerated as laws found for simpler systems were used to bootstrap explanations for more complex systems, gradually uncovering the “alphabet” used to describe those systems.

Read the full-text of the article here.


As we reconsider the beauties of brute force,
we might send a cheery greeting to David Hume, the Scottish Positivist philosopher; he was born on this date in 1711.  Bishop Berkeley may have wondered if, when a tree falls in the forest and no one is around, it makes a sound.  For Hume, the question was whether the tree was beautiful (“Beauty in things exists in the mind which contemplates them. “)

David Hume

But then, it’s also the birthday of the (somewhat more “practical”) Roman Emperor and Stoic Marcus Aurelius, born on this date in 121.  “Why should a man have any apprehension about the change and dissolution of all the elements?”  Why indeed?

Marcus Aurelius

Written by LW

April 26, 2009 at 1:01 am

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