A situation in which one action causes or initiates a similar action. In a nuclear chain reaction, for example, a neutron strikes a uranium-235 nucleus, causing the nucleus to undergo fission, which in turn produces a variety of products. Among these...

A chain reaction is a situation in which one action causes or initiates a similar action. In a nuclear chain reaction, for example, a neutron strikes a uranium-235 nucleus, causing the nucleus to undergo fission, which in turn produces a variety of...

A self-propagating chemical reaction in which activation on one molecule leads successfully to activation of many others. One type of chain reaction is called combustion...

A chain reaction is a sequence of reactions where a reactive product or by-product causes additional reactions to take...

The squeeze seemed to start in the 1950s. Once upon a time, you shopped in a lot of small stores, and then, almost suddenly, you didn't do that so often. Nobody called the small-store owners entrepreneurs back then, but that's what they are...

DON SCHMICKRATH OF Hewlett-Packard Co. in Palo Alto, Calif., believes that the only constant in supply chain management is change. "In some companies, the supply chain may change every 10 years; at HP it changes completely every three years," he says. "To say...

A nuclear power plant operator agreed Thursday to shut down a reactor in central Japan for inspection after it acknowledged a cover-up of an uncontrollable nuclear chain reaction eight years ago.Hokuriku Electric Power Co. failed to report to authorities that the self-sustaining nuclear chain reaction...

A blackout that struck Spain's second-largest city of Barcelona on Monday snarled traffic and knocked out power to hundreds of thousands of homes and businesses, authorities said.Officials said they believe the outage, which struck around 11 a.m. in Spain, was triggered by a faulty cable...