A recognition signal is a signal where a person, a ship, an airplane or something else is recognized. They can be used during war or can be used to help the police recognize each other during undercoveroperations. It can also be used in biology to signal that a molecule or chemical is to be bound to another molecule.
Other uses of the signal include the police who sometimes use a recognition signal so that officers in uniform can recognize officers in normal clothing (undercover). The NYPD often use headbands, wristbands or colored clothing as recognition signals which are known as the "color of the day".
"Signal" is the fourth single released by Japanese singer and cellist Kanon Wakeshima, and second single from her album, Tsukinami. The song "Signal" was used as the ending of the anime TV series Strike the Blood. The song reached #54 on the Oricon Singles Chart and stayed on the chart for two weeks.
Signal is a 2009 children's science fiction novel by Cynthia DeFelice. The book was a Junior Library Guild selection for 2009. The novel is about a boy who is bored with his new life in upstate New York and discovers a girl who claims to be from another planet, who has been kidnapped by an abusive couple, and attempts to make a signal to contact her home planet.
A journalist's account of being added to a group chat of national security officials coordinating plans for airstrikes has raised questions about how sensitive information is supposed to be handled ... .
PresidentDonald Trump is downplaying the texting of attack plans to a group chat that included a journalist as “the only glitch in two months” of his administration. Trump told NBCNews on Tuesday it “turned out not to be ... .
Signal is an end-to-end encrypted messaging app that is considered one of the most secure in the world by security professionals, but was never intended to be the go-to choice for White House officials planning a military operation ... .
A journalist’s inclusion in a national security discussion served as a reminder that you might not know every number in the chat — and that could be a big problem ... .