"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.
fleetCount++; // 新车队，计数+1
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Sixty-eight hours after take-off, they made it.
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In an update to her social media on Friday, she said had completed chemotherapy: "Seems I'm not dead... So, phew, big relief."