"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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Number (2): Everything in this space must add up to 2. The answer is 1-0, placed vertically; 6-2, placed vertically.，推荐阅读WPS下载最新地址获取更多信息
Дания захотела отказать в убежище украинцам призывного возраста09:44