8033期

最新文章

• Nuclear power for AI: what it will take to reopen Three Mile Island safely AI翻译
  作者：Greshko, Michael
• Using both faces of polar semiconductor wafers for functional devices AI翻译
  作者：van Deurzen, Len; Kim, Eungkyun; Pieczulewski, Naomi; Zhang, Zexuan; Feduniewicz-Zmuda, Anna; Chlipala, Mikolaj; Siekacz, Marcin; Muller, David; Xing, Huili Grace; Jena, Debdeep; Turski, Henryk
  作者单位：Cornell University; Cornell University; Cornell University; Polish Academy of Sciences; Institute of High Pressure Physics of the Polish Academy of Sciences; Cornell University
  摘要：Unlike non-polar semiconductors such as silicon, the broken inversion symmetry of the wide-bandgap semiconductor gallium nitride (GaN) leads to a large electronic polarization along a unique crystal axis(1). This makes the two surfaces of the semiconductor wafer perpendicular to the polar axis substantially different in their physical and chemical properties(2). In the past three decades, the cation (gallium) face of GaN has been used for photonic devices such as light-emitting diodes (LEDs) a...
• Permafrost slows Arctic riverbank erosion AI翻译
  作者：Geyman, Emily C.; Douglas, Madison M.; Avouac, Jean-Philippe; Lamb, Michael P.
  作者单位：California Institute of Technology; Massachusetts Institute of Technology (MIT)
  摘要：The rate of river migration affects the stability of Arctic infrastructure and communities1,2 and regulates the fluxes of carbon3,4, nutrients5 and sediment6,7 to the oceans. However, predicting how the pace of river migration will change in a warming Arctic8 has so far been stymied by conflicting observations about whether permafrost9 primarily acts to slow10,11 or accelerate12,13 river migration. Here we develop new computational methods that enable the detection of riverbank erosion at leng...
• Hundreds of methane super-sources pinpointed in satellite data AI翻译
  作者：[Anonymous]
• A 'Swiss army knife' microscope that doesn't break the bank AI翻译
  作者：[Anonymous]
  摘要：The parts of a 3D-printed device can be changed out, allowing for versatility as well as ultrahigh resolution.
• Birth of protein folds and functions in the virome (vol 633, pg 710, 2024) AI翻译
  作者：Nomburg, Jason; Doherty, Erin E.; Price, Nathan; Bellieny-Rabelo, Daniel; Zhu, Yong K.; Doudna, Jennifer A.
• A jaw-dropping discovery about early mammals AI翻译
  作者：Luo, Zhe-Xi
• 'AFRAID TO TALK': RESEARCHERS FEAR END OF VENEZUELAN SCIENCE AI翻译
  作者：Taylor, Luke
• Overshooting global-warming limits is a risky idea AI翻译
  作者：Mengis, Nadine
  作者单位：Helmholtz Association; GEOMAR Helmholtz Center for Ocean Research Kiel
• Future increase in extreme El Nino supported by past glacial changes AI翻译
  作者：Thirumalai, Kaustubh; DiNezio, Pedro N.; Partin, Judson W.; Liu, Dunyu; Costa, Kassandra; Jacobel, Allison
  作者单位：University of Arizona; University of Colorado System; University of Colorado Boulder; University of Texas System; University of Texas Austin; Woods Hole Oceanographic Institution; Middlebury College
  摘要：El Nino events, the warm phase of the El Nino-Southern Oscillation (ENSO) phenomenon, amplify climate variability throughout the world(1). Uncertain climate model predictions limit our ability to assess whether these climatic events could become more extreme under anthropogenic greenhouse warming(2). Palaeoclimate records provide estimates of past changes, but it is unclear if they can constrain mechanisms underlying future predictions(3-5). Here we uncover a mechanism using numerical simulati...