Such clustering allows them to activate automatically, so that they can proceed to activate the effector caspases.

The blowout preventer on the sea-bed, which should have been activated automatically to seal the well after the explosion, was rendered impotent because its battery was not charged.

The patent explains that the mechanism could be activated automatically by sensors that detect when a user wants to put the shoe on.

The fan activates automatically when a separate sensor unit detects high levels of pollution.

Once the secondary feedwater pumps stopped, three auxiliary pumps activated automatically.