7996期

最新文章

• How plants iron out the competing interests of growth and defence AI翻译
  作者：Webster, Shanice S.; Guerinot, Mary Lou
  作者单位：Duke University; Duke University; Howard Hughes Medical Institute; Dartmouth College
• Nozaki-Bekki solitons in semiconductor lasers AI翻译
  作者：Opacak, Nikola; Kazakov, Dmitry; Columbo, Lorenzo L.; Beiser, Maximilian; Letsou, Theodore P.; Pilat, Florian; Brambilla, Massimo; Prati, Franco; Piccardo, Marco; Capasso, Federico; Schwarz, Benedikt
  作者单位：Technische Universitat Wien; Harvard University; Massachusetts Institute of Technology (MIT); Politecnico di Bari; Politecnico di Bari; Consiglio Nazionale delle Ricerche (CNR); Istituto di Fotonica e Nanotecnologie (IFN-CNR); University of Insubria; Universidade de Lisboa
  摘要：Optical frequency-comb sources, which emit perfectly periodic and coherent waveforms of light1, have recently rapidly progressed towards chip-scale integrated solutions. Among them, two classes are particularly significant-semiconductor Fabry-Perot lasers2-6 and passive ring Kerr microresonators7-9. Here we merge the two technologies in a ring semiconductor laser10,11 and demonstrate a paradigm for the formation of free-running solitons, called Nozaki-Bekki solitons. These dissipative waveform...
• The CRISPR effector Cam1 mediates membrane depolarization for phage defence AI翻译
  作者：Baca, Christian F.; Yu, You; Rostol, Jakob T.; Majumder, Puja; Patel, Dinshaw J.; Marraffini, Luciano A.
  作者单位：Rockefeller University; Cornell University; Weill Cornell Medicine; Rockefeller University; Memorial Sloan Kettering Cancer Center; Memorial Sloan Kettering Cancer Center; Rockefeller University; Howard Hughes Medical Institute; Imperial College London
  摘要：Prokaryotic type III CRISPR-Cas systems provide immunity against viruses and plasmids using CRISPR-associated Rossman fold (CARF) protein effectors1-5. Recognition of transcripts of these invaders with sequences that are complementary to CRISPR RNA guides leads to the production of cyclic oligoadenylate second messengers, which bind CARF domains and trigger the activity of an effector domain6,7. Whereas most effectors degrade host and invader nucleic acids, some are predicted to contain transm...
• Observing dynamical phases of BCS superconductors in a cavity QED simulator AI翻译
  作者：Young, Dylan J.; Chu, Anjun; Song, Eric Yilun; Barberena, Diego; Wellnitz, David; Niu, Zhijing; Schaefer, Vera M.; Lewis-Swan, Robert J.; Rey, Ana Maria; Thompson, James K.
  作者单位：National Institute of Standards & Technology (NIST) - USA; University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder; Max Planck Society; University of Oklahoma System; University of Oklahoma - Norman; University of Oklahoma System; University of Oklahoma - Norman
  摘要：In conventional Bardeen-Cooper-Schrieffer superconductors1, electrons with opposite momenta bind into Cooper pairs due to an attractive interaction mediated by phonons in the material. Although superconductivity naturally emerges at thermal equilibrium, it can also emerge out of equilibrium when the system parameters are abruptly changed2-8. The resulting out-of-equilibrium phases are predicted to occur in real materials and ultracold fermionic atoms, but not all have yet been directly observe...
• Nausea and vomiting in pregnancy linked to hormone from fetus AI翻译
  作者：Hughes, Alice E.; Freathy, Rachel M.
  作者单位：University of Exeter
  摘要：Maternal sensitivity to a hormone produced by the fetus might underlie the risk of severe nausea and vomiting in human pregnancy - a finding that could open up strategies for the treatment of this debilitating condition.
• Cloned rhesus monkey lives to adulthood for first time AI翻译
  作者：Naddaf, Miryam
• Resolve climate-policy uncertainties in the US and China AI翻译
  作者：Zhang, Dayong; Guo, Kun; Ji, Qiang
  作者单位：Southwestern University of Finance & Economics - China; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences
• Computers make mistakes and AI will make things worse - the law must recognize that AI翻译
  作者：[Anonymous]
  摘要：A tragic scandal at the UK Post Office highlights the need for legal change, especially as organizations embrace artificial intelligence to enhance decision-making.
• From the archive: the mechanics of athletics, and the eating habits of jellyfish AI翻译
  作者：[Anonymous]
• Green steel from red mud through climate-neutral hydrogen plasma reduction AI翻译
  作者：Jovicevic-Klug, Matic; Souza Filho, Isnaldi R.; Springer, Hauke; Adam, Christian; Raabe, Dierk
  作者单位：Max Planck Society; RWTH Aachen University; Federal Institute for Materials Research & Testing
  摘要：Red mud is the waste of bauxite refinement into alumina, the feedstock for aluminium production1. With about 180 million tonnes produced per year1, red mud has amassed to one of the largest environmentally hazardous waste products, with the staggering amount of 4 billion tonnes accumulated on a global scale1. Here we present how this red mud can be turned into valuable and sustainable feedstock for ironmaking using fossil-free hydrogen-plasma-based reduction, thus mitigating a part of the stee...