Science

最新文章

• Lined up for entanglement AI翻译
  作者：Moiseev, Evgeny; Wang, Kai
  作者单位：McGill University
  摘要：A framework widely used in classical contexts provides new insights into solving an important challenge in quantum technology
• Beyond hedonic eating AI翻译
  作者：Small, Dana M.
  作者单位：McGill University; McGill University; McGill University
• Mars rover detects long-chain carbon molecules AI翻译
  作者：Voosen, Paul
  摘要：Fatty acid byproducts that Curiosity found in an ancient lakebed could be the remains of microbes-or not
• A geographic history of human genetic ancestry AI翻译
  作者：Grundler, Michael C.; Terhorst, Jonathan; Bradburd, Gideon S.
  作者单位：University of Michigan System; University of Michigan; University of Michigan System; University of Michigan
  摘要：Describing the distribution of genetic variation across individuals is a fundamental goal of population genetics. We present a method that capitalizes on the rich genealogical information encoded in genomic tree sequences to infer the geographic locations of the shared ancestors of a sample of sequenced individuals. We used this method to infer the geographic history of genetic ancestry of a set of human genomes sampled from Europe, Asia, and Africa, accurately recovering major population move...
• The Decline and Fall of the Human Empire: Why Our Species Is on the Edge of Extinction Gee AI翻译
  作者：Woolfson, Adrian; Gee, Henry
• A high-temperature nanostructured Cu-Ta-Li alloy with complexion-stabilized precipitates AI翻译
  作者：Hornbuckle, B. C.; Smeltzer, J. A.; Sharma, S.; Nagar, S.; Marvel, C. J.; Cantwell, P. R.; Harmer, M. P.; Solanki, K.; Darling, K. A.
  作者单位：United States Department of Defense; US Army Research, Development & Engineering Command (RDECOM); US Army Research Laboratory (ARL); United States Army; Lehigh University; Arizona State University; Arizona State University-Tempe; Louisiana State University System; Louisiana State University
  摘要：We present a bulk nanocrystalline copper alloy that can operate at near-melting temperatures with minimal coarsening and creep deformation. The thermal stability of the Cu-3Ta-0.5Li atomic % (at %) alloy is attributed to coherent, ordered L12 Cu3Li precipitates surrounded by a tantalum-rich atomic bilayer phase boundary complexion. Adding 0.5 at % lithium to the immiscible Cu-Ta system changes the morphology of the nanoscale precipitates from spherical to cuboidal while simultaneously tailorin...
• New data fill long-standing gaps in the study of policing AI翻译
  作者：Knox, Dean; Mummolo, Jonathan
  作者单位：University of Pennsylvania; Princeton University
  摘要：Data show discrimination, but analysis must be more policy relevant
• 23andMe files for bankruptcy AI翻译
  作者：Brainard, Jeffrey
• In the ashes AI翻译
  作者：Cornwall, Warren
• Guiding science in China AI翻译
  作者：Kennedy, Andrew
  作者单位：Australian National University