6686期

最新文章

• Beyond the Shockley-Queisser limit: Exploring new frontiers in solar energy harvest AI翻译
  作者：Lee, Young Hee
• From anxiety to action AI翻译
  作者：Moon, Tae Seok
  作者单位：Washington University (WUSTL)
• Large-scale self-organization in dry turbulent atmospheres AI翻译
  作者：Alexakis, Alexandros; Marino, Raffaele; Mininni, Pablo D.; van Kan, Adrian; Foldes, Raffaello; Feraco, Fabio
  作者单位：Universite Paris Cite; Sorbonne Universite; Centre National de la Recherche Scientifique (CNRS); Universite PSL; Ecole Normale Superieure (ENS); Centre National de la Recherche Scientifique (CNRS); Ecole Centrale de Lyon; Institut National des Sciences Appliquees de Lyon - INSA Lyon; Universite Claude Bernard Lyon 1; Universite Jean Monnet; University of Buenos Aires; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); University of Buenos Aires; University of California System; University of California Berkeley; Leibniz Association; Leibniz Institut fur Atmospharenphysik e.V. an der Universitat Rostock (IAP); University of Rostock
  摘要：How turbulent convective fluctuations organize to form larger-scale structures in planetary atmospheres remains a question that eludes quantitative answers. The assumption that this process is the result of an inverse cascade was suggested half a century ago in two-dimensional fluids, but its applicability to atmospheric and oceanic flows remains heavily debated, hampering our understanding of the energy balance in planetary systems. We show using direct numerical simulations with spatial reso...
• Recycling process produces microplastics AI翻译
  作者：Staplevan, Michael J.; Hai, Faisal I.
  作者单位：University of Wollongong
• Leverage demand-side policies for energy security AI翻译
  作者：Bento, Nuno; Grubler, Arnulf; Boza-Kiss, Benigna; De Stercke, Simon; Krey, Volker; Mccollum, David L.; Zimm, Caroline; Alves, Tiago
  作者单位：Instituto Universitario de Lisboa; International Institute for Applied Systems Analysis (IIASA); Imperial College London; Norwegian University of Science & Technology (NTNU); United States Department of Energy (DOE); Oak Ridge National Laboratory; University of Tennessee System; University of Tennessee Knoxville
  摘要：Energy security is a top priority for governments, companies, and households because energy systems and the critical functions that they support are threatened by disruptions from wars, pandemics, climate change, and other shocks ( 1 ). More often than not, governments rely on policies focused on energy supply to enhance energy security while generally ignoring demand-side possibilities. Further, the indicators traditionally used to measure energy security are also tilted toward the supply sid...
• Fast growth of single-crystal covalent organic frameworks for laboratory x-ray diffraction AI翻译
  作者：Han, Jing; Feng, Jie; Kang, Jia; Chen, Jie-Min; Du, Xin-Yu; Ding, San-Yuan; Liang, Lin; Wang, Wei
  作者单位：Lanzhou University; Lanzhou University
  摘要：The imine-exchange strategy makes single-crystal growth of covalent organic frameworks (COFs) with large size (>15 microns) possible but is a time-consuming process (15 to 80 days) that has had limited success (six examples) and restricts structural characterization to synchrotron-radiation sources for x-ray diffraction studies. We developed a CF3COOH/CF3CH2NH2 protocol to harvest single-crystal COFs within 1 to 2 days with crystal sizes of up to 150 microns. The generality was exemplified by ...
• Knowing the Neanderthal AI翻译
  作者：Nowell, April
  作者单位：University of Victoria
  摘要：An archaeologist seeks to strip away modern misconceptions about our extinct relatives
• A morphological basis for path-dependent evolution of visual systems AI翻译
  作者：Varney, Rebecca M.; Speiser, Daniel I.; Cannon, Johanna T.; Aguilar, Morris A.; Eernisse, Douglas J.; Oakley, Todd H.
  作者单位：University of California System; University of California Santa Barbara; University of South Carolina System; University of South Carolina Columbia; California State University System; California State University Fullerton
  摘要：Path dependence influences macroevolutionary predictability by constraining potential outcomes after critical evolutionary junctions. Although it has been demonstrated in laboratory experiments, path dependence is difficult to demonstrate in natural systems because of a lack of independent replicates. Here, we show that two types of distributed visual systems recently evolved twice within chitons, demonstrating rapid and path-dependent evolution of a complex trait. The type of visual system th...
• Budget cuts alarm French scientists AI翻译
  作者：Pain, Elisabeth
  摘要：Research and education to lose almost Euro1 billion Research and education to lose almost Euro1 billion
• Critical junctions in evolution AI翻译
  作者：Sumner-Rooney, Lauren
  作者单位：Leibniz Institut fur Evolutions und Biodiversitatsforschung
  摘要：The extent to which evolution is predictable is a frequent flashpoint for debate. Do organisms simply stumble around the adaptive landscape, or are they channeled along certain paths or trajectories? The emergence of convergent traits, whereby the same phenotypes evolve from different origins, spotlights this question. However, it is notoriously difficult to answer, particularly at macroevolutionary scales. On page 983 of this issue, Varney et al. (1) characterize critical junctions as the mom...