THIS goes way beyond water wings. An AI system is learning to recognise the panicky movements people make when they are
drowning. The idea is that the system could one day be used to save
children's lives when there are no lifeguards around.
Ultrasonic systems at swimming pools
can alert lifeguards if someone is underwater too long - but few pools
have them and they are no help at unguarded river banks and beaches. So
Ken Sakamura and colleagues at the University of Tokyo created an AI
system which could, for example, activate a body-worn flotation bag in
an emergency.
To train it, the team asked a lifeguard
to wear a pressure sensor and mimic the behaviour of swimmers who get
into difficulty: making rapid, flailing arm movements with their body
vertical. The lifeguard generated a telltale pressure change profile
that the system, based on neural network software, could reliably
distinguish from normal swimming.
The team want to make the system more
robust by training it using more volunteers, with an accelerometer added
to the sensor pack. They will present their results at the International Conference on Consumer Electronics in Las Vegas, Nevada, on 12 January












2010 Honda Civic VTi