"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.
Monica de Bolle says that Venezuela's state oil firm needs to be rebuilt
后来我搬了很多次家，住过各种各样的房子，但总会回想起这个童年的屋子。那是千禧年特有的色调：经济昂扬向上，物质尚不丰裕，但希望充盈，安放着人生中最漫长悠闲的时光。，详情可参考服务器推荐
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channel (the high-speed peripheral bus on mainframe computers, analogous to PCI)