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b4rringt0n (Member Profile)
Your video, The US President's Bulletproof Railcar, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.
An Explanation of the Solids of Constant Width Shape
FYI - The video shows that having a constant diameter (cross-section) is not enough to show the shape is round. This was discovered to be a problem in getting segments of the Space Shuttle solid rocket boosters to fit together. (The SRB segments would flex out of shape when they were transported across country lying sideways on railcars.) They had to be forced back to a round shape to fit together, with the O-rings in the gaps. As described in Richard Feynman's book, "What Do You Care What Other People Think?", NASA would measure diameters at different points. But Feynman knew about the funny shapes in this video, and knew that diameter measurements did not prove roundness. The technicians on site always had to keep inspecting the segments as they came together to get them to fit together.
Homeless Georgian student amuses self, entire country, by walking 30 km in 5h:34min while bouncing soccer ball on head
Full story from Reuters page on google video: "The crippling energy crisis, frequent electricity and hot water cuts, high unemployment and corruption in the former Soviet state of ... all » Georgia have caused misery to most of the country's 5.5 million people. But for some the crisis has become an odd incentive to break unusual records in endurance. Goderdzi Makharadze, a 28-year-old student, has been squatting in an empty railcar at Tbilisi rail station since he lost his place in a student's dormitory. To him it doesn't make much difference, the dormitory room is as dark and cold as his railway carriage. Unable to afford a hotel or hostel, he lives in an empty carriage at Tbilisi rail station. It is also his training ground and he climbs railway poles to increase his concentration and skill in heading a soccer ball. He has already found his way into the record books. In 1996, he broke a record by heading his ball non-stop for eight hours, twelve minutes and twenty-five seconds. His last record was breaking the 1987 distance juggling record set by Polish dribbler Janusz Kmiotek. Makharadze walked 30 kilometres and 300 metres from Georgia's old capital of Mtskheta to the Tbilisi soccer stadium in five hours and thirty-four minutes, amusing tourists and winning large applause from the home crowd."