6729期

最新文章

• Recent global temperature surge intensified by record-low planetary albedo AI翻译
  作者：Goessling, Helge F.; Rackow, Thomas; Jung, Thomas
  作者单位：Helmholtz Association; Alfred Wegener Institute, Helmholtz Centre for Polar & Marine Research; University of Bremen
  摘要：In 2023, the global mean temperature soared to almost 1.5 kelvin above the preindustrial level, surpassing the previous record by about 0.17 kelvin. Previous best-guess estimates of known drivers, including anthropogenic warming and the El Nino onset, fall short by about 0.2 kelvin in explaining the temperature rise. Using satellite and reanalysis data, we identified a record-low planetary albedo as the primary factor bridging this gap. The decline is apparently caused largely by a reduced low...
• Surface conduction and reduced electrical resistivity in ultrathin noncrystalline NbP semimetal AI翻译
  作者：Khan, Asir Intisar; Ramdas, Akash; Lindgren, Emily; Kim, Hyun-Mi; Won, Byoungjun; Wu, Xiangjin; Saraswat, Krishna; Chen, Ching-Tzu; Suzuki, Yuri; da Jornada, Felipe H.; Oh, Il-Kwon; Pop, Eric
  作者单位：Stanford University; Stanford University; Stanford University; Ajou University; International Business Machines (IBM); IBM USA; Stanford University; United States Department of Energy (DOE); Stanford University; SLAC National Accelerator Laboratory; Stanford University
  摘要：The electrical resistivity of conventional metals such as copper is known to increase in thin films as a result of electron-surface scattering, thus limiting the performance of metals in nanoscale electronics. Here, we find an unusual reduction of resistivity with decreasing film thickness in niobium phosphide (NbP) semimetal deposited at relatively low temperatures of 400 degrees C. In films thinner than 5 nanometers, the room temperature resistivity (similar to 34 microhm centimeters for 1.5...
• Solar geoengineering research faces geopolitical deadlock AI翻译
  作者：McLaren, Duncan; Corry, Olaf
  作者单位：University of California System; University of California Los Angeles; University of Leeds
• Compressed ionic plastic crystals are cool AI翻译
  作者：Tamarit, Josep-Lluis; Lloveras, Pol
  作者单位：Universitat Politecnica de Catalunya; Universitat Politecnica de Catalunya
  摘要：A family of materials exhibits a large thermal response at subambient temperatures
• Canadian forests are more conducive to high-severity fires in recent decades AI翻译
  作者：Wang, Weiwei; Wang, Xianli; Flannigan, Mike D.; Guindon, Luc; Swystun, Tom; Castellanos-Acuna, Dante; Wu, Wanli; Wang, Guangyu
  作者单位：University of British Columbia; Natural Resources Canada; Canadian Forest Service; Thompson Rivers University; Natural Resources Canada; Canadian Forest Service; Natural Resources Canada; Canadian Forest Service; Great Lakes Forestry Centre; University of Alberta; Parks Canada
  摘要：Canada has experienced more-intense and longer fire seasons with more-frequent uncontrollable wildfires over the past decades. However, the effect of these changes remains unknown. This study identifies driving forces of burn severity and estimates its spatiotemporal variations in Canadian forests. Our results show that fuel aridity was the most influential driver of burn severity, summer months were more prone to severe burning, and the northern areas were most influenced by the changing clim...
• Steady going in 2025 AI翻译
  作者：Thorp, H. Holden; Vinson, Valda; Kmec, Lauren
• After abandonment AI翻译
  作者：Charles, Dan
  摘要：When farmers leave their land, what version of nature takes over?
• Engineering synthetic phosphorylation signaling networks in human cells AI翻译
  作者：Yang, Xiaoyu; Rocks, Jason W.; Jiang, Kaiyi; Walters, Andrew J.; Rai, Kshitij; Liu, Jing; Nguyen, Jason; Olson, Scott D.; Mehta, Pankaj; Collins, James J.; Daringer, Nichole M.; Bashor, Caleb J.
  作者单位：Rice University; Rice University; Rice University; Boston University; Rice University; University of Texas System; University of Texas Health Science Center Houston; Boston University; Boston University; Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT); Harvard University; Massachusetts Institute of Technology (MIT); Broad Institute; Harvard University; Rowan University; Rice University; Massachusetts Institute of Technology (MIT)
  摘要：Protein phosphorylation signaling networks have a central role in how cells sense and respond to their environment. We engineered artificial phosphorylation networks in which reversible enzymatic phosphorylation cycles were assembled from modular protein domain parts and wired together to create synthetic phosphorylation circuits in human cells. Our design scheme enabled model-guided tuning of circuit function and the ability to make diverse network connections; synthetic phosphorylation circu...
• Competitive social feedback amplifies the role of early life contingency in male mice AI翻译
  作者：Zipple, Matthew N.; Kuo, Daniel Chang; Meng, Xinmiao; Reichard, Tess M.; Guess, Kwynn; Vogt, Caleb C.; Moeller, Andrew H.; Sheehan, Michael J.
  作者单位：Cornell University; Princeton University; University of California System; University of California Berkeley; Yale University
  摘要：Contingency (or luck) in early life plays an important role in shaping individuals' development. By comparing the developmental trajectories of functionally genetically identical free-living mice who either experienced high levels of resource competition (males) or did not (females), we show that competition magnifies early contingency. Male resource competition results in a feedback loop that magnifies the importance of early contingency and pushes individuals onto divergent, self-reinforcing...
• Care urged for animal remains tied to Indigenous peoples AI翻译
  作者：Heidt, Amanda