Context and question: The ranging signals are based on the CDMA principle and have complex structure typical of Galileo or modernized GPS. Similar to the other GNSS, there will be two levels of positioning service: open and restricted (military). The public service shall be available globally to general users. When all the currently planned GNSS systems are deployed, the users will benefit from the use of a total constellation of 75+ satellites, which will significantly improve all the aspects of positioning, especially availability of the signals in so-called urban canyons. The general designer of the COMPASS navigation system is Sun Jiadong, who is also the general designer of its predecessor, the original BeiDou navigation system.
What are the ranging signals of the BeiDou system based on?
Answer: the CDMA principle
Context and question: Nasser was greatly influenced by Egyptian nationalism, as espoused by politician Mustafa Kamel, poet Ahmed Shawqi, and his anti-colonialist instructor at the Royal Military Academy, Aziz al-Masri, to whom Nasser expressed his gratitude in a 1961 newspaper interview. He was especially influenced by Egyptian writer Tawfiq al-Hakim's novel Return of the Spirit, in which al-Hakim wrote that the Egyptian people were only in need of a "man in whom all their feelings and desires will be represented, and who will be for them a symbol of their objective". Nasser later credited the novel as his inspiration to launch the 1952 revolution.
What political theory fascinated Nasser?
Answer: Egyptian nationalism
Context and question: Feynman traveled to Brazil, where he gave courses at the BCPF (Brazilian Center for Physics Research) and near the end of his life schemed to visit the Russian land of Tuva, a dream that, because of Cold War bureaucratic problems, never became reality. The day after he died, a letter arrived for him from the Soviet government, giving him authorization to travel to Tuva. Later Feynman's daughter Michelle would realize this journey. Out of his enthusiastic interest in reaching Tuva came the phrase "Tuva or Bust" (also the title of a book about his efforts to get there), which was tossed about frequently amongst his circle of friends in hope that they, one day, could see it firsthand. The documentary movie, Genghis Blues, mentions some of his attempts to communicate with Tuva and chronicles the successful journey there by his friends. Responding to Hubert Humphrey's congratulation for his Nobel Prize, Feynman admitted to a long admiration for the then vice president.
When was Feynman allowed to go to Tuva?
Answer:
The day after he died