6636期

最新文章

• China battles alien weed at unprecedented scale Mammoth plan to control a coastal invader would benefit migratory birds AI翻译
  作者：Stokstad, Erik
• Women scientists group axes staff AI翻译
  作者：Brainard, Jeffrey
• Thermal exploration in engine design AI翻译
  作者：Carr, Lincoln D.; Parigi, Valentina
  作者单位：Colorado School of Mines; Universite PSL; College de France; Ecole Normale Superieure (ENS); Centre National de la Recherche Scientifique (CNRS); Sorbonne Universite
• Satellite swarms spoil Hubble's view AI翻译
  作者：Brainard, Jeffrey
• Response to Comment on Human TKTL1 implies greater neurogenesis in frontal neocortex of modern humans than Neanderthals AI翻译
  作者：Pinson, Anneline; Maricic, Tomislav; Zeberg, Hugo; Paeaebo, Svante; Huttner, Wieland B.
  作者单位：Max Planck Society; Max Planck Society; Karolinska Institutet
• Quantum state-resolved molecular dipolar collisions over four decades of energy AI翻译
  作者：Tang, Guoqiang; Besemer, Matthieu; Kuijpers, Stach; Groenenboom, Gerrit C.; van der Avoird, Ad; Karman, Tijs; van de Meerakker, Sebastiaan Y. T.
  作者单位：Radboud University Nijmegen
  摘要：Collisions between cold polar molecules represent a fascinating research frontier but have proven hard to probe experimentally. We report measurements of inelastic cross sections for collisions between nitric oxide (NO) and deuterated ammonia (ND3) molecules at energies between 0.1 and 580 centimeter-1, with full quantum state resolution. At energies below the similar to 100-centimeter-1 well depth of the interaction potential, we observed backward glories originating from peculiar U-turn traj...
• Sexual harassment allegations leveled at Swiss biologist Evolutionary biologist Laurent Keller, who is no longer employed by the University of Lausanne, denies all claims AI翻译
  作者：O'Grady, Cathleen
• Comment on Human TKTL1 implies greater neurogenesis in frontal neocortex of modern humans than Neanderthals AI翻译
  作者：Herai, Roberto H.; Semendeferi, Katerina; Muotri, Alysson R.
  作者单位：Pontificia Universidade Catolica do Parana; University of California System; University of California San Diego; University of California System; University of California San Diego; University of California System; University of California San Diego
  摘要：Pinson et al. (1) concluded that the modern human TKTL1 gene is responsible for an increased number of cortical neurons. We show that the putative Neanderthal variant of TKTL1 is present in modern human backgrounds. We dispute their argument that this genetic variant is responsible for brain differences in modern humans as opposed to Neanderthals.
• Observation of photon-photon thermodynamic processes under negative optical temperature conditions AI翻译
  作者：Muniz, A. L. Marques; Wu, F. O.; Jung, P. S.; Khajavikhan, M.; Christodoulides, D. N.; Peschel, U.
  作者单位：Friedrich Schiller University of Jena; State University System of Florida; University of Central Florida; Warsaw University of Technology; University of Southern California
  摘要：Statistical mechanics demands that the temperature of a system is positive provided that its internal energy has no upper bound. Yet if this condition is not met, it is possible to attain negative temperatures for which higher-order energy states are thermodynamically favored. Although negative temperatures have been reported in spin and Bose-Hubbard settings as well as in quantum fluids, the observation of thermodynamic processes in this regime has thus far remained elusive. Here, we demonstr...
• Empress of the Nile AI翻译
  作者：Sheppard, Kathleen
  作者单位：University of Missouri System; Missouri University of Science & Technology