6692期

最新文章

• A university cut tenured faculty's pay. They're suing AI翻译
  作者：Langin, Katie
  摘要：Tufts University case could set national precedent
• Sex differences in tissue immunity AI翻译
  作者：Puttur, Franz; Lloyd, Clare M.
  作者单位：Imperial College London
  摘要：Androgen signaling skews skin immunity toward reduced inflammation in male mice
• LESSONS IN PERSISTENCE AI翻译
  作者：Couzin-Frankel, Jennifer
  摘要：New Long Covid trials aim to clear lingering virus- and help patients in dire need
• Scientists flock to the eclipse AI翻译
  作者：Cummings, Sean
• The quantification of everything Digital data traces about our lives and preferences are pervasive and increasingly commodified AI翻译
  作者：Wai, Jonathan
  作者单位：University of Arkansas System; University of Arkansas Fayetteville; University of Arkansas System; University of Arkansas Fayetteville
  摘要：Digital data traces about our lives and preferences are pervasive and increasingly commodified
• Jailed conservationists freed AI翻译
  作者：[Anonymous]
• A magnetic massive star has experienced a stellar merger AI翻译
  作者：Frost, A. J.; Sana, H.; Mahy, L.; Wade, G.; Barron, J.; Le Bouquin, J. -b.; Merand, A.; Schneider, F. R. N.; Shenar, T.; Barba, R. H.; Bowman, D. M.; Fabry, M.; Farhang, A.; Marchant, P.; Morrell, N. I.; Smoker, J. V.
  作者单位：KU Leuven; European Southern Observatory; Royal Military College - Canada; Queens University - Canada; Centre National de la Recherche Scientifique (CNRS); Institut de Planetologie et d'Astrophysique de Grenoble (IPAG); Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Ruprecht Karls University Heidelberg; Tel Aviv University; Universidad de La Serena; Newcastle University - UK; Institute for Research in Fundamental Sciences IPM; Carnegie Institution for Science; University of Edinburgh
  摘要：Massive stars (those >= 8 solar masses at formation) have radiative envelopes that cannot sustain a dynamo, the mechanism that produces magnetic fields in lower-mass stars. Despite this, approximately 7% of massive stars have observed magnetic fields, the origin of which is debated. We used multi-epoch interferometric and spectroscopic observations to characterize HD 148937, a binary system of two massive stars. We found that only one star is magnetic and that it appears younger than its compa...
• Ultrahigh energy storage in high-entropy ceramic capacitors with polymorphic relaxor phase AI翻译
  作者：Zhang, Min; Lan, Shun; Yang, Bing B.; Pan, Hao; Liu, Yi Q.; Zhang, Qing H.; Qi, Jun L.; Chen, Di; Su, Hang; Yi, Di; Yang, Yue Y.; Wei, Rui; Cai, Hong D.; Han, Hao J.; Gu, Lin; Nan, Ce-Wen; Lin, Yuan-Hua
  作者单位：Tsinghua University; Chinese Academy of Sciences; Hefei Institutes of Physical Science, CAS; University of California System; University of California Berkeley; Chinese Academy of Sciences; Institute of Physics, CAS; Tsinghua University; Tsinghua University
  摘要：Ultrahigh-power-density multilayer ceramic capacitors (MLCCs) are critical components in electrical and electronic systems. However, the realization of a high energy density combined with a high efficiency is a major challenge for practical applications. We propose a high-entropy design in barium titanate (BaTiO3)-based lead-free MLCCs with polymorphic relaxor phase. This strategy effectively minimizes hysteresis loss by lowering the domain-switching barriers and enhances the breakdown strengt...
• Image library shows diversity of human bodies AI翻译
  作者：[Anonymous]
• Kink bands promote exceptional fracture resistance in a NbTaTiHf refractory medium-entropy alloy AI翻译
  作者：Cook, David H.; Kumar, Punit; Payne, Madelyn I.; Belcher, Calvin H.; Borges, Pedro; Wang, Wenqing; Walsh, Flynn; Li, Zehao; Devaraj, Arun; Zhang, Mingwei; Asta, Mark; Minor, Andrew M.; Lavernia, Enrique J.; Apelian, Diran; Ritchie, Robert O.
  作者单位：University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; University of California System; University of California Irvine; United States Department of Energy (DOE); Pacific Northwest National Laboratory; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory
  摘要：Single-phase body-centered cubic (bcc) refractory medium- or high-entropy alloys can retain compressive strength at elevated temperatures but suffer from extremely low tensile ductility and fracture toughness. We examined the strength and fracture toughness of a bcc refractory alloy, NbTaTiHf, from 77 to 1473 kelvin. This alloy's behavior differed from that of comparable systems by having fracture toughness over 253 MPam(1/2), which we attribute to a dynamic competition between screw and edge ...