Usenix: Dartmouth expanding diff, grep Unix tools

itworld.com: senix: Dartmouth expanding diff, grep Unix tools

Via: slashdot.org: Researchers Expanding Diff, Grep Unix Tools

The new programs, called Context-Free Grep and Hierarchical Diff, will provide the ability to parse blocks of data rather than single lines. For each new type of data structure, a vendor would provide a pattern library identifying the basic structure of the data, which the software would then use to “extract the constructs of interest from the document,” Weaver said.

Yet Another Cantor Crank

Good Math, Bad Math: Yet Another Cantor Crank

The problem with the run-of-the-mill Cantor crank is that they never even try to actually address Cantor’s proof. They just say “look, here’s a mapping that works!”

So the entire disproof of their “refutation” of Cantor’s proof is… Cantor’s proof. They completely ignore the thing that they’re claiming to disprove.

Pas mal, n’est-ce pas? LOL 😉

Waterfall, Moonbow, and Aurora from Iceland

Via: Astronomy Picture of the Day:
Waterfall, Moonbow, and Aurora from Iceland

Explanation: The longer you look at this image, the more you see. Perhaps your eye is first drawn to the picturesque waterfall called Skogarfoss visible on the image right. Just as prevalent, however, in this Icelandic visual extravaganza, is the colorful arc of light on the left. This chromatic bow is not a rainbow, since the water drops did not originate in rainfall nor are they reflecting light from the Sun. Rather, the drops have drifted off from the waterfall and are now illuminated by the nearly full Moon. High above are the faint green streaks of aurora. The scene, captured one night last month, also shows a beautiful starscape far in the background, including the Big Dipper, part of the constellation of the Great Bear (Ursa Major).