"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.
The firm's five-year contract, initially estimated to be worth £6m, has more than a year left to run - however a new company will start taking over the work in the coming months.
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习近平总书记多次在重要会议上批评错误政绩观的表现，明确强调：“不要有大干快上的冲动，也就是不能不按规律办事，急功近利、急于出成绩。要把这种浮躁心理、急躁心态都压下来，扎扎实实、踏踏实实地搞现代化建设。”