2024

最新文章

• US secretly knocked China vax AI翻译
  作者：Brainard, Jeffrey
• As UK election nears, major parties reveal their science plans AI翻译
  作者：Else, Holly
• Daniel C. Dennett (1942-2024) AI翻译
  作者：Yuste, Rafael; Levin, Michael
  作者单位：Columbia University; Tufts University
• Russia, North Korea to aid big cat AI翻译
  作者：Brainard, Jeffrey
• Wild poliovirus makes comeback in Afghanistan and Pakistan AI翻译
  作者：Roberts, Leslie
• Bitter Roots: The Search for Healing Plants in Africa AI翻译
  作者：d'Avignon, Robyn
  作者单位：New York University
• Topological Hong-Ou-Mandel interference AI翻译
  作者：Ehrhardt, Max; Dittel, Christoph; Heinrich, Matthias; Szameit, Alexander
  作者单位：University of Rostock; University of Freiburg; University of Freiburg
  摘要：The interplay of topology and optics provides a route to pursue robust photonic devices, with the application to photonic quantum computation in its infancy. However, the possibilities of harnessing topological structures to process quantum information with linear optics, through the quantum interference of photons, remain largely uncharted. Here, we present a Hong-Ou-Mandel interference effect of topological origin. We show that this interference of photon pairs-ranging from constructive to d...
• Plastic foam pollution from Chinese fisheries AI翻译
  作者：Wang, Hui; Liu, Peng; Yuan, Yihui; Wang, Ning
  作者单位：Hainan University
• Carbon nanotube fibers with dynamic strength up to 14 GPa AI翻译
  作者：Zhang, Xinshi; Lei, Xudong; Jia, Xiangzheng; Sun, Tongzhao; Luo, Jiajun; Xu, Shichen; Li, Lijun; Yan, Dan; Shao, Yuanlong; Yong, Zhenzhong; Zhang, Yongyi; Wu, Xianqian; Gao, Enlai; Jian, Muqiang; Zhang, Jin
  作者单位：Peking University; Beijing Graphene Institute; Chinese Academy of Sciences; Institute of Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Wuhan University; Ningxia University; Chinese Academy of Sciences; Suzhou Institute of Nano-Tech & Nano-Bionics, CAS; Chinese Academy of Sciences; University of Science & Technology of China, CAS
  摘要：High dynamic strength is of fundamental importance for fibrous materials that are used in high-strain rate environments. Carbon nanotube fibers are one of the most promising candidates. Using a strategy to optimize hierarchical structures, we fabricated carbon nanotube fibers with a dynamic strength of 14 gigapascals (GPa) and excellent energy absorption. The dynamic performance of the fibers is attributed to the simultaneous breakage of individual nanotubes and delocalization of impact energy...
• Bomb radiocarbon evidence for strong global carbon uptake and turnover in terrestrial vegetation AI翻译
  作者：Graven, Heather D.; Warren, Hamish; Gibbs, Holly K.; Khatiwala, Samar; Koven, Charles; Lester, Joanna; Levin, Ingeborg; Spawn-Lee, Seth A.; Wieder, Will
  作者单位：Imperial College London; University of Wisconsin System; University of Wisconsin Madison; University of Wisconsin System; University of Wisconsin Madison; University of Oxford; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; Ruprecht Karls University Heidelberg; University of Wisconsin System; University of Wisconsin Madison; Nature Conservancy; National Center Atmospheric Research (NCAR) - USA; University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder
  摘要：Vegetation and soils are taking up approximately 30% of anthropogenic carbon dioxide emissions because of small imbalances in large gross carbon exchanges from productivity and turnover that are poorly constrained. We combined a new budget of radiocarbon produced by nuclear bomb testing in the 1960s with model simulations to evaluate carbon cycling in terrestrial vegetation. We found that most state-of-the-art vegetation models used in the Coupled Model Intercomparison Project underestimated t...