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Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...
The Shapiro time delay effect, or gravitational time delay effect, is one of the four classic Solar System tests of general relativity. Radar signals passing near a massive object take slightly longer to travel to a target and longer to return than they would if the mass of the object were not present. The time delay is caused by time dilation ...
The discography of Nas, an American rapper, consists of seventeen studio albums, one collaborative album, one group album, five compilations, four mixtapes, one extended play, and seventy-nine singles (including twelve collaboration singles and thirty-three as a featured artist). Nas has sold over 20 million records in the United States alone ...
A rise in electricity outages in Mali since the military seized power in a 2020 coup has affected public support for the junta, particularly when the temperatures rise and people suffer, said ...
Jesse Grant/Getty Images Ryan Phillippe took a walk down memory lane with a photo of ex-wife Reese Witherspoon. “We were hot and drenched in late 90’s angst @reesewitherpoon (such a cooler ...
The Shapiro reaction or tosylhydrazone decomposition is an organic reaction in which a ketone or aldehyde is converted to an alkene through an intermediate hydrazone in the presence of 2 equivalents of organolithium reagent. [1] [2] [3] The reaction was discovered by Robert H. Shapiro in 1967. [4] The Shapiro reaction was used in the Nicolaou ...