6749期

最新文章

• A refinery in a thin film AI翻译
  作者：Budd, Peter M.
  作者单位：University of Manchester
• Systemic failure of European fisheries management: Overcoming shortsighted interests with politically independent ecosystem-based catch limits may end overfishing in EU waters AI翻译
  作者：Froese, Rainer; Steiner, Noa; Papaioannou, Eva; MacNeil, Liam; Reusch, Thorsten B. H.; Scotti, Marco
  作者单位：Helmholtz Association; GEOMAR Helmholtz Center for Ocean Research Kiel; University of Kiel; Consiglio Nazionale delle Ricerche (CNR); Istituto di Bioscienze e Biorisorse (IBBR-CNR)
• Sonar tool poised to map sea floor in fine detail AI翻译
  作者：Berkowitz, Rachel
• Alpha and helion particle charge radius difference determined from quantum-degenerate helium AI翻译
  作者：van der Werf, Y.; Steinebach, K.; Jannin, R.; Bethlem, H. L.; Eikema, K. S. E.
  作者单位：Vrije Universiteit Amsterdam; University of Groningen; Eindhoven University of Technology; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS)
  摘要：Accurate spectroscopic measurements of calculable systems provide a powerful method for testing the Standard Model and extracting fundamental constants. Recently, spectroscopic measurements of finite nuclear size effects in normal and muonic hydrogen resulted in unexpectedly large adjustments of the proton charge radius and the Rydberg constant. We measured the 2(3)S -> 2(1)S transition frequency in a Fermi gas of He-3 with an order of magnitude higher accuracy than determined previously. Toge...
• 3D laminar flow-assisted crystallization of perovskites for square meter-sized solar modules AI翻译
  作者：Yan, Buyi; Dai, Wanlei; Wang, Zheng; Zhong, Zhiming; Zhang, Lei; Yu, Mingqiang; Zhou, Qianjin; Ma, Qianling; Yan, Kangrong; Zhang, Lu; Yang, Yang (Michael); Yao, Jizhong
  作者单位：Zhejiang Sci-Tech University; Zhejiang University
  摘要：Transforming laboratory-scale perovskite solar cells to large-scale production will require uniform crystallization of the perovskite film. We designed a method to aid the crystallization process by generating well-defined three-dimensional (3D) laminar airflow over square meter-sized perovskite films using a customized 3D-printed structure. The resultant perovskite solar modules with areas of 0.7906 square meters had a certified power conversion efficiency of 15.0% and achieved compliance wit...
• A pulsar-helium star compact binary system formed by common envelope evolution AI翻译
  作者：Yang, Z. L.; Han, J. L.; Zhou, D. J.; Jing, W. C.; Chen, W. C.; Wang, T.; Li, X. D.; Wang, S.; Wang, B.; Ge, H. W.; Guo, Y. L.; Li, L. H.; Shao, Y.; Liu, J. F.; Su, W. Q.; Hou, L. G.; Huang, W. J.; Jiang, J. C.; Jiang, P.; Sun, J. H.; Wang, B. J.; Wang, C.; Wang, H. G.; Wang, J. B.; Wang, N.; Wang, P. F.; Wang, S. Q.; Xu, H.; Xu, J.; Xu, R. X.; Yan, W. M.; Yan, Y.; You, X. P.; Yu, D. J.; Yuan, Z. S.; Zhang, C. F.
  作者单位：Chinese Academy of Sciences; National Astronomical Observatory, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Qingdao University of Technology; Nanjing University; Nanjing University; Chinese Academy of Sciences; Yunnan Astronomical Observatory, NAOC, CAS; Sun Yat Sen University; Guangzhou University; Chinese Academy of Sciences; Xinjiang Astronomy Observatory, CAS; Peking University; Southwest University - China
  摘要：A stellar common envelope occurs in a binary system when the atmosphere of an evolving star expands to encompass an orbiting companion object. Such systems are predicted to evolve rapidly, ejecting the stellar envelope and leaving the companion in a tighter orbit around a stripped star. We used radio timing to identify a pulsar, PSR J1928+1815, with a spin period of 10.55 ms in a compact binary system with an orbital period of 3.60 hours. The companion star has 1.0 to 1.6 solar masses, eclipse...
• Erasure cooling, control, and hyperentanglement of motion in optical tweezers AI翻译
  作者：Shaw, Adam L.; Scholl, Pascal; Finkelstein, Ran; Tsai, Richard Bing-Shiun; Choi, Joonhee; Endres, Manuel
  作者单位：California Institute of Technology; Stanford University; Tel Aviv University
  摘要：Coherently controlling the motion of single atoms in optical tweezers would enable new applications in quantum information science. To demonstrate this, we first prepared atoms in their motional ground state using a species-agnostic cooling mechanism that converts motional excitations into erasures, errors with a known location. This cooling mechanism fundamentally outperforms idealized traditional sideband cooling, which we experimentally demonstrated. By coherently manipulating the resultant...
• US cuts risk backslide on neglected tropical diseases AI翻译
  作者：Enserink, Martin
• Regulate microplastics in drinking water AI翻译
  作者：Xiao, Xue
  作者单位：University of Wisconsin System; University of Wisconsin Madison
• The silent signals of climate change AI翻译
  作者：Feehan, Colette J.; Filbee-Dexter, Karen
  作者单位：Montclair State University; University of Western Australia; University of Western Australia; Institute of Marine Research - Norway