"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.
第五条 县级以上人民政府应当加强对行政执法监督工作的组织领导，研究部署行政执法监督工作，支持和保障行政执法监督机构切实履行职责。
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抗議其後演變為民主運動，成為1997年香港主權移交中國以來，對政府最嚴峻的挑戰。
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Urgent research needed to tackle AI threats, says Google AI boss
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