3
May

Being me on less than 1.5 percent

A recent article in TIME magazine ("Evolving Darwin," by Carl Zimmer, February 23, 2009, issue) about Darwin's theories and scientists' more recent findings using DNA had some rare gems in it that I'd like to share. The basis of the article is a book --… more »
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24
Jun

An electromagnetic stew

A while back I started a series of pieces about "things electrical." Published to date are entries titled "A drift of electrons" "Sweet induction" This is the third installment. When I first started studying electronics, I came across… more »
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29
Apr

Sweet induction

This is part 2 of my "things electrical" series. Sweet induction Before we get into the specifics of induction and inductors, transformers and windings, let me give a word to why talk about them. It seems to me that the aura is an example of indu… more »
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8
Apr

A drift of electrons

Lately things electrical have been coming to mind. Namely the drift of electrons in electric current the operation of inductors Electricity -- a mixture of electricity and magnetism Electrical potential A drift of electrons When I was f… more »
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19
Mar

The Power of Roundness, part 2

Here are two diffraction patterns, one round and the other square.     Note that the circular pattern is concentric, circle within circle within circle; and the square pattern repeats, each square diminishing in size from c… more »
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