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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.
"At that point in the investigation, we're [still] looking at 29 states here in the US. I mean, you're talking about tens of thousands of addresses, and that's a very, very daunting task," says Squire.，详情可参考一键获取谷歌浏览器下载
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Устройства американского бренда — iPhone и iPad — были одобрены в руководстве Североатлантического альянса (НАТО) после того, как их протестировало Федеральное управление информационной безопасности Германии. В Apple объяснили, что факт подобного одобрения позволяет хранить на девайсах секретную информацию без установки отдельного программного обеспечения (ПО).