8004期

最新文章

• Pattern formation by turbulent cascades AI翻译
  作者：de Wit, Xander M.; Fruchart, Michel; Khain, Tali; Toschi, Federico; Vitelli, Vincenzo
  作者单位：Eindhoven University of Technology; Centre National de la Recherche Scientifique (CNRS); Universite PSL; Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI); University of Chicago; Consiglio Nazionale delle Ricerche (CNR); Istituto per le Applicazioni del Calcolo Mauro Picone (IAC-CNR); University of Chicago
  摘要：Fully developed turbulence is a universal and scale-invariant chaotic state characterized by an energy cascade from large to small scales at which the cascade is eventually arrested by dissipation 1-6 . Here we show how to harness these seemingly structureless turbulent cascades to generate patterns. Pattern formation entails a process of wavelength selection, which can usually be traced to the linear instability of a homogeneous state 7 . By contrast, the mechanism we propose here is fully no...
• 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...