by grink
I received March 2009's IEEE Spectrum and there is an interesting article on electronically controlled pneumatic braking:
Electronically controlled railway brakes may finally displace a 150-year-old technology
http://staging.spectrum.ieee.org/mar09/7927
Electronically controlled railway brakes may finally displace a 150-year-old technology
http://staging.spectrum.ieee.org/mar09/7927