【#特朗普政府两年前解散全球流行病防御机构# 美前高官指责疫情应对因此滞后】Trump administration dismantled the office for global health security and biodefense in 2018, thus failed to properly prepare for a global pandemic in time, former national security adviser Susan Rice said in an interview with CNN on Thursday. She said the decision partly resulted in the government's delayed response to the coronavirus outbreak despite ample warnings.

#wair写字# 看完了#educated# 最后两章
The curtain between Tara and her family is falling down. She’s saying goodbye to her family. And when she’s leaving the mountains like a bird, the significance of education is revealed. It’s a complex relationship between Tara and her father. With love, hatred, misunderstanding, relief, and many others. Between them is education.

#科普科研动态[超话]#来自美国杜克大学大学的Jagoda Sławińska和北德克萨斯大学的Jagoda Sławińska的团队，基于密度泛函理论（DFT）的计算，定量地估计两种材料的低对称和高对称结构的自旋霍尔电导（SHCs）。发现铁电相确实可以增强SHE，而不是顺电结构。并从自旋Berry曲率的附加贡献来解释这个效应，它起源于极性相的自旋分裂电子态。其次，由于半导体中SHE的实现需要掺杂，研究了极性畸变随载流子浓度的演化，并估计了维持低对称相的掺杂临界水平。通过对这些材料中驱动铁电性的孤对载流子的分析，发现GeTe中的极性位移可以维持在 1021/cm3以上的临界空穴浓度，而SnTe中的微小畸变在最低掺杂水平下消失。最后，计算了掺杂结构的自旋霍尔角，证明了自旋霍尔效应确实可以在极性相位中实现。自旋霍尔效应、Rashba自旋织构和铁电共存于一种材料中，将有助于设计新型的无磁性ELD的一体化自旋电子器件。在实际实现SHE和Rashba效应（RE）电控制等应用方面具有广阔的前景。#涨姿势##科普大作战#