"Tuning frictional behavior on the fly has been a long-standing engineering dream," said co-author Katia Bertoldi of Harvard University. "This new insight into how surface geometry governs slip pulses paves the way for tunable frictional metamaterials that can transition from low-friction to high-grip states on demand.” In addition, the dynamics revealed by these results are similar to those of tectonic faults and thus give scientists a new model for the mechanics of earthquakes, according to their new paper published in the journal Nature.
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At the start of this year, a video popped up on social media sites in India showing the chief executive of the Bombay Stock Exchange, Sundararaman Ramamurthy, giving investors advice on which stocks to buy.，推荐阅读体育直播获取更多信息
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