A host of beleaguered technology companies announced a staggering 31,000 worldwide job cuts Thursday, marking one of the worst days for layoffs since the tech bubble burst a year ago.Thursday’s moves from a variety of tech titans, which already are slogging through the worst year in the industry’s history, caused analysts to wonder whether the carnage would get even worse and when it would come to an end.“I don’t think anybody has the faintest idea,” said Richard Shaffer, principal with Technolo...