I just received my March 2005 issue of Technology Review. In any word where the vowel is repeated because of a prefix, they put an umlaut over the second vowel.
[li]Page 13 in the letter “Killing Science at NASA” they use “deëmphasizing.”[/li][li]Page 17 in “Cloning: Let the Market Decide” they use “preëlection.”[/li][li]Several articles use “coördinate.”[/li][/ol]
I have never seen this in an American English publication. Are the folks at MIT ahead of the curve or this an old, formal standard?