Anglo-Saxon spindle whorl
Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.
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Understanding the Fundamental Shift in Search Behavior
江波龙作为“存储器第一股”，以PTM商业模式实现差异化突围，覆盖嵌入式存储、固态硬盘等四大产品线，其eMMC和UFS产品全球排名第四，自主研发的主控芯片已批量出货，累计小容量NAND Flash出货量超1亿颗，广泛应用于IoT、汽车、安防等领域。