Rolling blackouts in Java and Bali are the result of a shortage of coal supplies. There is disarray from top to bottom.

Abstract: The Multi-depot Vehicle Routing Problem with Uncertain Demand (MD-VRPUD) can be modeled as a bi-level optimization problem (BLOP), because it requires both assigning customers to different ...

For new discoveries, everyday mysteries, and the science behind the headlines, follow NPR's ShortWave podcast . Over a century ago, the German psychologist Wolfgang Köhler conducted what became a ...

WASHINGTON — The Pentagon is increasingly concerned about Israel ramping up its spying on the U.S., recently raising the counterintelligence threat level from America’s top ally in the Middle East to ...