6803期

最新文章

• Divergent evolution of nitrogen cycling along gradients of landscape water velocities AI翻译
  作者：Wu, Songjun; Soulsby, Chris; Zheng, Yi; Musolff, Andreas; Tetzlaff, Doerthe
  作者单位：Leibniz Association; Leibniz Institut fur Gewasserokologie und Binnenfischerei (IGB); University of Aberdeen; Southern University of Science & Technology; Helmholtz Association; Helmholtz Center for Environmental Research (UFZ); Humboldt University of Berlin; Humboldt University of Berlin
  摘要：Increasing fertilization has pushed the nitrogen cycle beyond planetary boundaries, yet its fate remains uncertain owing to long-standing neglect of landscape water velocities in nitrogen models. Leveraging isotope-aided modeling across 3821 European catchments, we demonstrate that evolution of nitrogen cycling is strongly linked to shifts in landscape water velocities since 1980. We propose the concept of wetness boundaries, where hydrological transitions beyond boundaries amplify nitrogen ac...
• Ecological risks of orbital solar reflectors AI翻译
  作者：Zhu, Jiangwei; Fu, Li
  作者单位：Nanjing Forestry University; Hangzhou Dianzi University
• In (qualified) defense of the research project grant AI翻译
  作者：Azoulay, Pierre
  作者单位：Massachusetts Institute of Technology (MIT); National Bureau of Economic Research
• Organic spontaneous emission approaching the monochromatic limit AI翻译
  作者：Mamada, Masashi; Kataoka, Kota; Ochi, Junki; Lee, Taehwan; Matsumoto, Ryuji; Yoshioka, Mayu; Fukushima, Daisuke; Hatakeyama, Takuji
  作者单位：Kyoto University; Sumitomo Chem Co Ltd; Sumitomo Chem Co Ltd
  摘要：Spontaneous emission is inherently associated with spectral broadening mechanisms, resulting in finite bandwidth in the emitted light. Narrowing this linewidth toward the monochromatic limit has long been a central pursuit in photonics, as it determines the ultimate color purity of nonstimulated light sources. Organic luminescent materials offer facile wavelength tunability but typically exhibit broad emission bands (>40 nanometers). The emergence of multiple-resonance emitters has provided a ...
• An all-optical signal processor enabling terabit-per-second real-time equalization AI翻译
  作者：Wang, Benshan; Xiao, Qiarong; Xu, Tengji; Fan, Li; Liu, Shaojie; Kong, Qiuqiang; Dong, Jianji; Zhang, Junwen; Huang, Chaoran
  作者单位：Chinese University of Hong Kong; Huazhong University of Science & Technology; Fudan University
  摘要：Large-scale artificial intelligence training demands ultralow-latency, energy-efficient interconnects for massive graphics processing unit clusters. In intensity-modulation/direct-detection links, digital signal processing (DSP) equalization is limited by nonideal equalization caused by phase loss as well as tight power and latency budgets. We present an integrated, programmable optical signal processor (OSP) that functions as a nonlinear universal equalizer and performs all-optical, DSP-free,...
• The air pollution benefits of low-severity fire AI翻译
  作者：Higuera-Mendieta, Ivan; Burke, Marshall
  作者单位：Stanford University; Stanford University; National Bureau of Economic Research
  摘要：Wildfires are reversing decades of air quality improvements across much of the US. Expanded use of prescribed fire is a primary proposed solution, but air quality trade-offs-more initial smoke for less smoke later-remain poorly quantified. Using two decades of satellite-derived measurements of fire severity and smoke particulate matter across California, we assessed the causal effect of low-severity wildfire, a proxy for prescribed burning, on subsequent wildfire activity and air quality. We f...
• A global map for introgressed structural variation and selection in humans AI翻译
  作者：Hsieh, PingHsun; Soisangwan, Natthapon; Gordon, David S.; Javidh, Athef; Harvey, William T.; Porubsky, David; Hoekzema, Kendra; Baker, Carl; Munson, Katherine M.; Kinipi, Christopher; Leavesley, Matthew; Brucato, Nicolas; Cox, Murray P.; Ricaut, Francois-X; Romero, Irene Gallego; Eichler, Evan E.
  作者单位：University of Minnesota System; University of Minnesota Twin Cities; University of Minnesota System; University of Minnesota Twin Cities; University of Minnesota System; University of Minnesota Twin Cities; University of Washington; University of Washington Seattle; European Molecular Biology Laboratory (EMBL); University of Papua New Guinea; James Cook University; James Cook University; Institut de Recherche pour le Developpement (IRD); Centre National de la Recherche Scientifique (CNRS); Communaute d'universites et etablissements de Toulouse (Comue); Universite de Toulouse (EPE); Institut National Polytechnique de Toulouse; Massey University; University of Auckland; St. Vincent's Institute of Medical Research; University of Tartu; University of Melbourne; Howard Hughes Medical Institute; University of Washington; University of Washington Seattle
  摘要：Genetic introgression from Neanderthals and Denisovans shaped modern human genomes; however, introgressed structural variants (SVs >= 50 base pairs) remain challenging to discover. We integrated high-quality phased assemblies from four new Papua New Guinea (PNG) haploid genomes with 94 published assemblies of diverse ancestry to infer an introgressed SV map. Introgressed SVs are enriched in genes (47%), including critical genomic disorder regions, and are most abundant in PNG genomes. We ident...
• An embryo editing 'first' is more complicated than headlines suggest Scientists may have a better way to make gene-edited babies, but it's still far from safe AI翻译
  作者：Travis, John
• Exceeding nature's biological speed limits AI翻译
  作者：Dumais, Jacques
  作者单位：Universidad Adolfo Ibanez
• Divergent trajectories of the nitrogen cycle Water isotope measurements are used to model surface water nitrogen flows on a continental scale AI翻译
  作者：Futter, Martyn
  作者单位：Swedish University of Agricultural Sciences