Some of the boxes were too full to be properly closed, others were half-empty, with only a few books knocking around inside, making an ominous sound.
The door management system (DMS) is a safety-critical system in an aircraft which checks if all doors are properly closed and the cabin has the correct pressure.
Still, she said, the reality is, "if you have doors that can open, you're never going to be able to guarantee that they're properly closed".
"If that runway had been properly closed off, that accident would not have happened," said Bruce Tognazzini, who headed the human-computer interface group at Apple Computer for years and is now also part of the Nielsen Norman Group.
Additionally, ensure that apps are properly closed when not in use to prevent them from running in the background by double-tapping the Home button on an iPhone to see what's still open (at the bottom of the screen).
It was not yet clear, they said, whether the metal latch on the train's door malfunctioned, whether the door had not been properly closed by a passenger walking between cars or whether the train conductor was within the speed limit set for that area.
Here, of course, is where it gets exciting, for it raises the possibility that the curtains will not be properly closed and that we might be able to do what the absolute transparency of the glass walls has rendered impossible: spy on them!
They didn't even bother to check if the boot was properly closed.
