"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.
Care roles hit particularly hard by UK’s lurch to the right on migration, according to analysis of Home Office data
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建设单位：西安嘉睿置业有限公司（企业法人：王庆，项目负责人：韩明）；施工单位：陕西昱升建设工程有限公司（企业法人：李旭，项目经理：张博）；监理单位：陕西建科项目管理有限公司（企业法人：田立奇，总监理工程师：刘江）