"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.
（十）在查处违反治安管理活动时，为违法犯罪行为人通风报信的；
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반려견놀이터에 ‘낚싯바늘 빵’ 던져놓은 60대…“개 짖는 소리 시끄러워”
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