Well start with the Pi, its a quickie.
“Upper Darby Man Takes Pi Further Afield“
“
Remember pi? Most of us learned the 3.14 part.
Marc Umile has gone oh-so-much farther.
On Friday, the Upper Darby resident was certified as the North
American record-holder for memorizing digits of the mathematical
constant. He spewed out 12,887 digits, to be exact - a feat that took
him 3 hours and 40 minutes.”
…
“Umile, 40, wrote the numbers out by hand, a thousand at a time, then recorded them in his voice on a portable tape player.
Then, he listened - and listened. During his commute. During his lunch break. While walking down the street.
After 2 1/2 years, 2 worn-out tape players and more than 100 batteries, it sank in.”
…
“Umile is far short of the world record of 43,000 that van
Koningsveld cites on his list, held by Krishan Chahal of India. He’s
even farther from the 67,890 digits listed by the Guinness World
Records, a feat accomplished in China.
But he does hold the world record for memorizing 905 digits of “e” -
another key mathematical constant - which he recited on the same day as
pi. And three months earlier, he notched another world record by doing
the first 5,544 digits of the square root of two.”
Wow….Interesting hobby…..
http://www.philly.com/mld/philly/16522064.htm
And,
The solar power for your laptop!
Here’s a link to a blog with a link on how to build a $180 solar laptop charger.
. The roughtly 2-pound kit should power a laptop for about 105 minutes, with the screen at about 75% brightness (should be fine for a sunny day, no?). Not a bad idea, but it requires 5 hours of sun. I don’t really know when the last time I had 5 hours in the sun away from a power outlet, but I applaud the idea.
http://www.treehugger.com/files/2007/01/portable_solar.php
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