58-летняя Памела Андерсон в ультракоротких шортах снялась для журнала

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"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.,详情可参考快连下载安装

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Latest US-Iran nuclear talks conclude with claims of ‘significant progress’

中华人民共和国增值税法实施条例