Abstract: The agile Earth observation satellite scheduling problem (AEOSSP) with time-dependent transition time is a combinatorial optimization challenge. Due to its NP-hardness, problem-tailored ...

Abstract: The traditional genetic algorithm tends to fall into local optimality when solving large scale satellite mission planning problem, which makes it difficult to attain better planning results.

KLEW’s broadcast signal returned to the air Tuesday for viewers who use satellite TV services, according to a company official. For people who watch KLEW with DirecTV, Dish Network, Sparklight or ...

Getting a visa to visit the U.S. may soon take less time – but cost more money – for some travelers. Starting July 1, travelers applying for B1 and B2 nonimmigrant visas for business and tourism will ...

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 ...