"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.
Technicians are trying to diagnose a helium flow problem in the upper stage of the moon rocket ahead of Artemis II, which could launch as early as April.
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По подозрению в убийстве Андрея Портнова — экс-советника бывшего президента Украины Виктора Януковича — в ФРГ задержан украинец Александр Азизов. Об этом сообщило издание «Украинская правда» («УП») со ссылкой на свои источники.
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