It is a signalling mechanism.
Instead of the shrill note of urgency, it was softer, like birdsong, just a signalling tweet.
Both caloric restriction and exercise appear to dampen mTOR, a signalling pathway that regulates cellular metabolism.
A signalling problem at Merstham in Surrey prevented London-bound trains from stopping at Redhill, Merstham or Coulsdon South.
There were delays of up to 45 minutes at London Bridge station because of a signalling problem.
This is a signalling molecule that is also, unfortunately for victims, the target of cholera toxin.
It may be that tort reform is most valuable as a signalling device.
But non-payment of interest is technically a default.There is also a signalling problem.
The guilty pleasure could then function as a signalling mechanism, an indicator that one takes pleasure in something but knows (the knowingness is key) that one really shouldn't.
Andrew Hunter, a signalling engineer, is one of those responsible for developing and installing the new technology that controls driverless trains with minimal human intervention.
Our hero, Reading-to-London, challenges other trains to races, only to be told he must wait for an hour because of a signalling fault at Twyford.
