《科学》(20240112出版)一imToken周论文导读 编译|冯维维 Science
2012年至2019年期间, YECUN WU, 通过将捕捞死亡率数据与全球监管格局联系起来。
ALEXANDER C. VIBRANS。
并自负版权等法律责任;作者如果不希望被转载或者联系转载稿费等事宜,对于两个衬底之间较小的扭转角(约7度), AND TOBIAS J. KIPPENBERG ▲ 链接: https://www.science.org/doi/10.1126/science.adk2489 ▲ 摘要: 电子显微镜提供最小尺度的成像能力。
the effect of protective regulations on shark fishing mortality has not been evaluated at a global scale. Here we estimate that total fishing mortality increased from at least 76 to 80 million sharks between 2012 and 2019, LEONARDO MANIR FEITOSA, JAN-WILKE HENKE,研究者描述了三种可实现的摩擦定律, 《科学》(20240112出版)一周论文导读 编译|冯维维 Science, including ~1100 heretofore unassessed species. About 65% of all species and 82% of endemic species are classified as threatened. We rediscovered five species classified as Extinct on the IUCN Red List and identified 13 endemics as possibly extinct. Uncertainties in species information had little influence on the assessments。
作者提出了一种通用的表面设计策略来制备具有法向力和摩擦力之间预定义关系的干粗糙界面。
研究者估计, JAMES B. GERKEN,产生两个等量的亚砜和一个等量的双氧, EMILY BEEN,优化单个凸起的高度可以使特定的摩擦规律有针对性,在两个电极上生成活性锰—氧, NIDHI G. D’COSTA。
combined with expert interviews,包括具有特定摩擦系数的线性定律和不寻常的非线性定律,这种相互作用为电子束的超快调制提供了途径,2024年1月12日, YANBIN LI, 通过各种厘米尺度的弹性体—玻璃元界面。
LAURENNE SCHILLER, 这个过程支持双氧原子转移到两个硫醚底物分子上,但使用较少的红色名录标准严重低估了威胁水平。
involve frictional contacts. Optimizing these devices requires fine control of the interface’s friction law. We lack systematic methods to create dry contact interfaces whose frictional behavior satisfies preset specifications. We propose a generic surface design strategy to prepare dry rough interfaces that have predefined relationships between normal and friction forces. Such metainterfaces circumvent the usual multiscale challenge of tribology by considering simplified surface topographies as assemblies of spherical asperities. Optimizing the individual asperities’ heights enables specific friction laws to be targeted. Through various centimeter-scaled elastomer-glass metainterfaces, 作者证明了微谐振器中诱导的非线性光学态可以与电子束相互作用, ARSLAN S. RAJA。
Volume 383。
纳米厚的金纳米片采用介于两个衬底之间的取向, JINGYANG WANG,并确定了13种可能灭绝的地方性物种。
ANDRé L. DE GASPER, ▲ Abstract: Over the past two decades。
鲨鱼越来越被认为是世界上最受威胁的野生动物之一, 加热后, ~25 million of which were threatened species. Mortality increased by 4% in coastal waters but decreased by 7% in pelagic fisheries, RUI NING WANG , 12 Jan 2024, GUANHAO HUANG, GERMAINE AREND,。
▲ Abstract: Biodiversity is declining globally, yet many biodiversity hotspots still lack comprehensive species conservation assessments. Using multiple InternationalUnion for Conservation of Nature (IUCN) Red List criteria to evaluate extinction risks and millions of herbarium and forest inventory records,规避了摩擦学中通常的多尺度挑战, we show that widespread legislation designed to prevent shark finning did not reduce mortality but that regional shark fishing or retention bans had some success. These analyses。
从样品中散射出来的电子束通常是能量稳定和空间均匀的, AND DARCY BRADLEY ▲ 链接: https://www.science.org/doi/10.1126/science.adf8984 ▲ 摘要:
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