They inform higher level networks that depend on them about their state.
What's more, critics say, Goldman's analysis depended on management's own opinion about the success of its strategy in the future.
The city depends on the reactor for about a quarter of the heat used in the district heating system.
Then we have to depend on ourselves and what about the people in the boat - who's going to save them?
Most researchers at the time thought even that sort of limited cloning success depended on something special about frogs.
This small nation depends on oil exports for about half of its foreign exchange and tax income.
I said it depended on his schedule but what about a week?
The Government still depends on oil revenue for about a third of its annual income.
Asked how far, he said it depended on the size: about twenty miles for a small one, much more for a large.