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High-voltage AC overhead systems are not only for standard gauge national networks. The meter gauge Rhaetian Railway (RhB) and the neighbouring Matterhorn Gotthard Bahn (MGB) operate on 11 kV at 16.7 Hz frequency. Practice has proven that both Swiss and German 15 kV trains can operate under these lower voltages. The RhB started trials of the 11 kV system in 1913 on the Engadin line (St. Moritz-Scuol/Tarasp). The MGB constituents Furka-Oberalp-Bahn (FO) and Brig-Visp-Zermatt Bahn (BVZ) introduced their electric services in 1941 and 1929 respectively, adopting the already proven RhB system.

When was the first trail of RhB system tested?
Answer: 1913
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The AFL currently runs as under the single-entity model, with the league owning the rights to the teams, players, and coaches. The single-entity model was adopted in 2010 when the league emerged from bankruptcy. Prior to that, the league followed the franchise model more common in North American professional sports leagues; each team essentially operated as its own business and the league itself was a separate entity which in exchange for franchise fees paid by the team owners provided rules, officials, scheduling and the other elements of organizational structure. A pool of money is allotted to teams to aid in travel costs.

What model of ownership is commonly used in American professional sports?
Answer: franchise model
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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.

Who went to Tuva in Feynman's stead?
Answer:
Feynman's daughter Michelle