text: First, She's 83 percent happy, 9 percent disgusted, 6 percent fearful, and 2 percent angry. No that's not your science teacher, grading your latest lad assignment. It's the subject of leonardo da vinci's renaissance painting, Mona Lisa- at least according to some newsoftware that can recognize emotions. Imagine if "A classroom could recognize when a student is becoming confused or bored," Dr. uang predicts. " then it could modify the lesson, like an effective human instructor." The same technology can make computer- animated facs more expressive-for video games or video surgery.