Entropy (information gain)

http://zh.wikipedia.org/wiki/%E7%86%B5_(%E4%BF%A1%E6%81%AF%E8%AE%BA)

http://en.wikipedia.org/wiki/Information_gain_in_decision_trees

http://www.autonlab.org/tutorials/infogain11.pdf

http://homes.cs.washington.edu/~shapiro/EE596/notes/InfoGain.pdf

Changing All Fonts in Powerpoint

Want to replace all font for powerpoint slides?
This feature is support directly in powerpoint 2007, 2010.

Under Home Tab

Choose Replace Font under Replace (Editing Section)

And choose the font you want to replace!

That's it!