"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.
Раскрыты подробности о договорных матчах в российском футболе18:01
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宽容从来不是单向的索取，而是双向的修行。一次两次，人家付之一笑，三次四次，是可忍孰不可忍？宽容是有限度的，忍耐是有底线的，再宽厚的胸怀，也经不起反复消耗；终有一天，这份宽容会消失殆尽，留下的只有疏远与冷漠，更可能是人家的反戈一击。
The Google Pixel 10a comes out on March 5, and right now, Amazon and Best Buy are both offering free $100 gift cards when you preorder. The phone’s price is $499, but the gift card sweetens the deal. It’ll be automatically added to your cart.
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