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Newly unsealed court filings have revealed that US singer D4vd - real name David Anthony Burke - is the target of a grand jury investigation into the apparent murder of a 14-year-old girl, whose remains were found in his car in September.，推荐阅读服务器推荐获取更多信息
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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.，推荐阅读旺商聊官方下载获取更多信息
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