We suggest a method for determination of the mean excitation energies of several biomolecules, such as amino acids, using a Bragg-like sum rule developed for molecular fragments or functional groups.

Developing ab initio approaches able to provide accurate excited-state energies at a reasonable computational cost is one of the biggest challenges in theoretical chemistry. In that framework, the ...

Brittany Force shredded her own New England Dragway speed record from last year with a dominating performance Sunday at Epping, N.H., that included two passes at more than 340 mph and a .007 ...

Three U.S. World War II bombs found in Cologne defused after prompting the evacuation of 20,000 residents and the closure of hospitals, businesses and transportation routes.

The California State Assembly has approved a bill that would force individuals purchasing properties with solar projects into new net billing scenarios, which would likely reduce compensation for ...

And then there was the German Luftwaffe’s Poltava raid on the U.S. Air Force in 1944, when German fighters targeted Allied bomber formations stationed in Ukraine and inflicted heavy casualties ...

HAVANA (AP) — For Marylín Álvarez and her family, like countless other Cubans, the question is no longer if the power will go out, but when — forcing them to implement ingenious alternatives to ...

Learning light-weight yet expressive deep networks for image synthesis is a challenging problem. Inspired by a recent observation that it is the data-specificity that makes the multi-head ...

The Space Force this week revealed a new model for upgrading its East and West Coast ranges, shifting upfront costs that used to be borne by the government to the commercial launch companies that ...

President Donald Trump has nominated a Navy admiral to become the next leader of U.S. Central Command and an Air Force general to take charge of U.S. Africa Command, the Pentagon announced Wednesday.

Combined with hard-hitting oil sanctions, such a move would force Putin to reconsider his long-standing belief that time is on his side—that Western resolve will crack if he just waits long enough.

WASHINGTON — The Space Force has awarded BAE Systems $1.2 billion to build 10 satellites for its new missile warning constellation to track hypersonic cruise missiles as well as ballistic missiles.