Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
For blind people, there might exist too much unpredictable problems in a day. For example, when blind people filling up the glass of water, they have no idea when it will be filled. Using the leverage principle, when the water is almost full, the gravity will change and the center will tip backwards to knock the glass. This will inform them that the water has been filled.
YEH CHI MEI