Dido, Queen of Carthage (opera) reminds him of his duty to his people, Aeneas realises that he must abandon Dido. As Aeneas and his men set sail for Italy and Carthage is besieged by Iarbas and his troops, the heartbroken Dido commits suicide and dies amidst the flames of the city. Masque: "Neptune's Prophecy" In the patriotic masque which followed the opera performance, Neptune, the god of the sea, appears along with Venus, Ascanius, and the Three Graces to praise the glory of Great Britain as a "god-like race" and to predict that the nation will eclipse both Tyre and Carthage in naval fame. Dido,
DIDO (software) in solving for the costates in optimal control problems. DIDO generates spectrally accurate solutions whose extremality can be verified using Pontryagin's Minimum Principle. Because no knowledge of pseudospectral methods is necessary to use it, DIDO is often used as a fundamental mathematical tool for solving optimal control problems. That is, a solution obtained from DIDO is treated as a candidate solution for the application of Pontryagin's minimum principle as a necessary condition for optimality. DIDO is used world wide in academia, industry and government laboratories. Thanks to NASA, DIDO was flight-proven in 2006. On November 5, 2006, NASA used DIDO