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Education

Submission + - Why bicycles are so stable? 1

Roland Piquepaille writes: "For almost 150 years now, mathematicians have tried to understand why a bicycle could be so stable. Now, researchers of the Delft University of Technology (TU Delft), working with colleagues from Cornell University and the University of Nottingham, UK, say they've build a model which unravels how a bicycle works. As said a bicycle maker, when designing a bike, only three parameters are used: the general geometry, the distance between the axles, and the angle at which the fork points downwards. The new mathematical model includes 25 parameters and will permit to build bicycles aimed directly at special target groups. Already, a Dutch bicycle manufacturing company is hoping to design better bikes using this model. But read more for additional details and a picture of the bicycle used to calibrate the model."
Handhelds

Submission + - Usability test: Does iPhone match the hype? (blogspot.com)

Manu writes: We all know that in the technology world, the hype about new products often doesn't match reality. So it's fair to ask: Is the iPhone as good as its hype? In particular, does iPhone's much-discussed touch-screen interface really make using the device simpler and more intuitive?

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