Binary decoder. In digital electronics, a binary decoder is a combinational logic circuit that converts a binary integer value to an associated pattern of output bits. They are used in a wide variety of applications, including data demultiplexing, seven segment displays, and memory address decoding.
When the Indian Ocean tsunami struck on Dec. 26, 2004, no one saw the massive waves coming. Authorities in Indonesia, where a 9.1 magnitude quake sparked the tsunami, weren't able to send out an alert because the country's sensor system had been hit by lightning. Thai officials did send a warning, but only after the first deadly wave hit. And in India, word of the disaster went to the wrong official.
Massive sea surges triggered by an earthquake under the Indian Ocean have killed over 10,000 people in southern Asia, with many more feared dead. An 8.9 magnitude earthquake under the sea near Aceh, north Indonesia, at 0759 local time (0059 GMT) generated the biggest tsunami the world has seen for at least 40 years. The wall of water fanned out across the Indian Ocean at high speed and slammed into coastal areas with little or no warning.