6799期

最新文章

• When aid stops AI翻译
  作者：Dreher, Axel
  作者单位：Ruprecht Karls University Heidelberg; University of Milano-Bicocca; Swiss Federal Institutes of Technology Domain; ETH Zurich; Centre for Economic Policy Research - UK; Leibniz Association; Ifo Institut
• Aiding peace or conflict? The impact of USAID cuts on violence AI翻译
  作者：Rohner, D.; Sunde, U.; Vanden Eynde, O.; Wright, A. L.; Zeng, J. -r.
  作者单位：University of Lausanne; Centre for Economic Policy Research - UK; University of Munich; Paris School of Economics; Centre National de la Recherche Scientifique (CNRS); University of Chicago
  摘要：Less than a week after its inauguration, the second Trump administration issued a blanket stop-work order for the United States Agency for International Development (USAID), the largest national humanitarian donor. The social and political effects of abrupt aid withdrawal are poorly understood, especially in fragile states where relief is a key safety net. We provide quasi-experimental evidence on the shutdown's impact on subnational conflict across Africa. Leveraging historical exposure to US...
• Fertilizer shocks put food systems at risk AI翻译
  作者：Dai, Li; Zhao, Zongyin
  作者单位：Huazhong Agricultural University
• Defender of postdoc from China locked out of his lab: Plant biologist Roger Innes decried prosecution for smuggling biological materials AI翻译
  作者：Mervis, Jeffrey
• Protist-dominated hard substrate faunas thrive at the deepest ocean depths AI翻译
  作者：Song, Xikun; Gooday, Andrew J.; Gordon, Dennis P.; Leduc, Daniel; Sun, Yike; Wang, Zizhu; He, Qian; Gao, Zhaoming; Ruthensteiner, Bernhard; Waeschenbach, Andrea; Schwaha, Thomas; Lin, Xiaolan; Zhang, Hanyu; Rowden, Ashley; Xu, Hengchao; Liu, Shuangquan; Chen, Shun; Meng, Liang; Li, Dee; Alfiansah, Yustian Rovi; Guo, Huijie; Du, Mengran; Peng, Xiaotong
  作者单位：Chinese Academy of Sciences; Institute of Deep-Sea Science & Engineering, CAS; NERC National Oceanography Centre; Natural History Museum London; Earth Sciences New Zealand; National Institute of Water & Atmospheric Research (NIWA) - New Zealand; Tsinghua University; Hainan Tropical Ocean University; Xiamen University; University of Vienna; Xiamen University; Thermo Fisher Scientific; National Research & Innovation Agency of Indonesia (BRIN); Chinese Academy of Sciences; Institute of Software, CAS
  摘要：Deep-sea hard substrates host faunal novelties and distinct evolutionary lineages. However, sessile organisms on rocks are difficult to sample and largely unknown at extreme hadal depths. Here, we report a deep hard-substrate fauna (9000 to 10,898 meters), comprising 32 species of six protist and metazoan phyla, most millimeter-sized and new to science, from the Kermadec and Mariana trenches, using the manned submersible Fendouzhe. We show that the filamentous organisms dominating these assemb...
• Trump administration cuts CDC's key role in global program to stop HIV AI翻译
  作者：Cohen, Jon
• Unlock AI model sharing for EU health data AI翻译
  作者：Muda, Benedetta; Villa, Emanuele; Caporale, Nicolo; Testa, Giuseppe; Marelli, Luca
  作者单位：University of Milan; Human Technopole; KU Leuven; University of Milan; University of Milan
• A powerhouse species in peril AI翻译
  作者：Schiffman, Richard
• Accelerated Himalayan river meandering and dynamics due to climate change AI翻译
  作者：Lin, Zhipeng; Han, Zhongpeng; Montgomery, David R.; Ul Hussan, Waqas; Iversen, Lars Lonsmann; Bendixen, Mette; Xu, Xu; Yao, Ling; Bai, Yalige; Wang, Xinhang; Huang, Er; Liu, Xingnian; Wang, Chengshan
  作者单位：Sichuan University; China University of Geosciences; China University of Geosciences; University of Washington; University of Washington Seattle; McGill University; McGill University; China University of Geosciences; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Nanjing Institute of Geology & Paleontology, CAS
  摘要：River meandering and migration are fundamental processes worldwide, and the high Himalayas offer an opportunity to test whether river morphodynamics are shifting in response to a rapidly changing climate. We used remote-sensing imagery and field observations to quantify river meandering and associated dynamics for three major river basins over four decades. Between 1980-2000 and 2000-2020, rates of unconfined migration, cutoff, avulsion, and transitions between single- and multithread channel ...
• High-temperature memristors enabled by interfacial engineering AI翻译
  作者：Zhao, Jian; Jorgensen, Cameron S.; Mahalingam, Krishnamurthy; Bowers, Cynthia; Sugimoto, Wataru; Ito, Kai; Kim, Seung Ju; Zhao, Ruoyu; Xu, Yichun; Liao, Han-Ting; Kalia, Rajiv K.; Nakano, Aiichiro; Shimamura, Kohei; Shimojo, Fuyuki; Vashishta, Priya; Roy, Ajit K.; Ge, Ning; Hu, Miao; Williams, R. Stanley; Xia, Qiangfei; Ganguli, Sabyasachi; Yang, J. Joshua
  作者单位：University of Southern California; Kumamoto University; University of Southern California; University of Massachusetts System; University of Massachusetts Amherst
  摘要：Nonvolatile memories (NVMs) that operate reliably at high temperatures are essential for electronics in extreme environments. Here, we report graphene (Gra)/HfOx/tungsten (W) memristors that operated reliably up to 700 degrees C, with an ON/OFF current ratio of >10(3), data retention >50 hours, and endurance >10(9) switching cycles. Transmission electron microscopy revealed substantial W diffusion into the inert platinum (Pt) electrode in conventional Pt/HfOx/W memristors after high-temperatur...