Nature

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• At least one in a dozen stars shows evidence of planetary ingestion AI翻译
  作者：Liu, Fan; Ting, Yuan-Sen; Yong, David; Bitsch, Bertram; Karakas, Amanda; Murphy, Michael T.; Joyce, Meridith; Dotter, Aaron; Dai, Fei
  作者单位：Monash University; Swinburne University of Technology; Australian National University; Australian National University; University System of Ohio; Ohio State University; University System of Ohio; Ohio State University; Carnegie Institution for Science; Max Planck Society; University College Cork; HUN-REN; HUN-REN Research Centre for Astronomy & Earth Sciences; Konkoly Thege Miklos Astronomical Institute; Dartmouth College; California Institute of Technology; California Institute of Technology
  摘要：Stellar chemical compositions can be altered by ingestion of planetary material1,2 and/or planet formation, which removes refractory material from the protostellar disk3,4. These 'planet signatures' appear as correlations between elemental abundance differences and the dust condensation temperature3,5,6. Detecting these planet signatures, however, is challenging owing to unknown occurrence rates, small amplitudes and heterogeneous star samples with large differences in stellar ages7,8. Therefo...
• 'Global swimways' on free-flowing rivers will protect key migratory fish species AI翻译
  作者：Stoffers, Twan; Sayer, Catherine A.; Baratech, Adela; He, Fengzhi
  作者单位：Leibniz Association; Leibniz Institut fur Gewasserokologie und Binnenfischerei (IGB); Chinese Academy of Sciences; Northeast Institute of Geography & Agroecology, CAS
  摘要：Letter to the Editor
• HOW TEXT-TO-VIDEO TOOL SORA COULD SHAPE SCIENCE - AND SOCIETY AI翻译
  作者：O'Callaghan, Jonathan
  摘要：OpenAI's debut of its impressive Sora text-to-video tool has raised important questions.
• A fundamental constant in physics gets an update AI翻译
  作者：[Anonymous]
  摘要：Scientists controlled a hydrogen atom with electric fields to derive a highly precise estimate of the Rydberg constant.
• A concerted neuron-astrocyte program declines in ageing and schizophrenia AI翻译
  作者：Ling, Emi; Nemesh, James; Goldman, Melissa; Kamitaki, Nolan; Reed, Nora; Handsaker, Robert E.; Genovese, Giulio; Vogelgsang, Jonathan S.; Gerges, Sherif; Kashin, Seva; Ghosh, Sulagna; Esposito, John M.; Morris, Kiely; Meyer, Daniel; Lutservitz, Alyssa; Mullally, Christopher D.; Wysoker, Alec; Spina, Liv; Neumann, Anna; Hogan, Marina; Ichihara, Kiku; Berretta, Sabina; Mccarroll, Steven A.
  作者单位：Harvard University; Massachusetts Institute of Technology (MIT); Broad Institute; Harvard University; Harvard Medical School; Harvard University; Harvard Medical School; Harvard University; Harvard University Medical Affiliates; McLean Hospital; Harvard University; Harvard Medical School; Harvard University; Harvard Medical School
  摘要：Human brains vary across people and over time; such variation is not yet understood in cellular terms. Here we describe a relationship between people's cortical neurons and cortical astrocytes. We used single-nucleus RNA sequencing to analyse the prefrontal cortex of 191 human donors aged 22-97 years, including healthy individuals and people with schizophrenia. Latent-factor analysis of these data revealed that, in people whose cortical neurons more strongly expressed genes encoding synaptic c...
• Meaningfulness in a scientific career is about more than tangible outputs AI翻译
  作者：Alexandrova, Anna
  作者单位：University of Cambridge
  摘要：Letter to the Editor
• Could AI-designed proteins be weaponized? Scientists lay out safety guidelines AI翻译
  作者：Callaway, Ewen
  摘要：AI tools that can come up with protein structures at the push of a button should be used safely and ethically, say researchers in the field.
• So...you've been hacked AI翻译
  作者：Brooks, Michael
  摘要：Research institutions are under siege from cybercriminals and other digital assailants. How do you make sure you don't let them in?
• Non-reciprocal topological solitons in active metamaterials AI翻译
  作者：Veenstra, Jonas; Gamayun, Oleksandr; Guo, Xiaofei; Sarvi, Anahita; Meinersen, Chris Ventura; Coulais, Corentin
  作者单位：University of Amsterdam
  摘要：From protein motifs1 to black holes2, topological solitons are pervasive nonlinear excitations that are robust and can be driven by external fields3. So far, existing driving mechanisms all accelerate solitons and antisolitons in opposite directions3,4. Here we introduce a local driving mechanism for solitons that accelerates both solitons and antisolitons in the same direction instead: non-reciprocal driving. To realize this mechanism, we construct an active mechanical metamaterial consisting...
• Photonic chip-based low-noise microwave oscillator AI翻译
  作者：Kudelin, Igor; Groman, William; Ji, Qing-Xin; Guo, Joel; Kelleher, Megan L.; Lee, Dahyeon; Nakamura, Takuma; Mclemore, Charles A.; Shirmohammadi, Pedram; Hanifi, Samin; Cheng, Haotian; Jin, Naijun; Wu, Lue; Halladay, Samuel; Luo, Yizhi; Dai, Zhaowei; Jin, Warren; Bai, Junwu; Liu, Yifan; Zhang, Wei; Xiang, Chao; Chang, Lin; Iltchenko, Vladimir; Miller, Owen; Matsko, Andrey; Bowers, Steven M.; Rakich, Peter T.; Campbell, Joe C.; Bowers, John E.; Vahala, Kerry J.; Quinlan, Franklyn; Diddams, Scott A.
  作者单位：National Institute of Standards & Technology (NIST) - USA; University of Colorado System; University of Colorado Boulder; California Institute of Technology; University of California System; University of California Santa Barbara; University of Virginia; Yale University; National Aeronautics & Space Administration (NASA); NASA Jet Propulsion Laboratory (JPL); California Institute of Technology; University of Colorado System; University of Colorado Boulder
  摘要：Numerous modern technologies are reliant on the low-phase noise and exquisite timing stability of microwave signals. Substantial progress has been made in the field of microwave photonics, whereby low-noise microwave signals are generated by the down-conversion of ultrastable optical references using a frequency comb1-3. Such systems, however, are constructed with bulk or fibre optics and are difficult to further reduce in size and power consumption. In this work we address this challenge by l...