Drive rotating heavy objects or inflatable airbags to produce only annoying, repetitive movements.
Now, engineers at the Massachusetts Institute of Technology suggest that a twisted shape memory alloy array be buried in the seat (www. tinyurl. com/3ayr9q).
When electric heating, SMAs changes shape and can apply more varying degrees of body manipulation, says MIT.
BT research labs near Ipswich, UK are developing a new USB plugin:
An acceleration meter
This gadget will allow control for those with dexterity problems in some aspects of the software.