"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.
추운 계절을 버티라고 화분을 빨간 헝겊으로 감싸 두었네요. 길가에 놓인 작은 꽃다발 같습니다. 봄에 더 푸르게 피어나길 바라는 마음이겠지요.
，这一点在下载安装 谷歌浏览器 开启极速安全的 上网之旅。中也有详细论述
В Финляндии предупредили об опасном шаге ЕС против России09:28
Neil Murray on stage with Gary Moore in the early 1980s
"content": (item.get("content") or "").replace("\n", " ").strip(),