2024

最新文章

• Air sacs reduce energy costs for soaring birds AI翻译
  作者：Tobalske, Bret W.
  作者单位：University of Montana System; University of Montana
  摘要：Certain air sacs have evolved in multiple lineages of soaring birds, and it emerges that these probably function to reduce the force required from the major flight muscles as they hold the wings in place during gliding and soaring.
• High-speed and large-scale intrinsically stretchable integrated circuits (vol 627, pg 313, 2024) AI翻译
  作者：Zhong, Donglai; Wu, Can; Jiang, Yuanwen; Yuan, Yujia; Kim, Min-gu; Nishio, Yuya; Shih, Chien-Chung; Wang, Weichen; Lai, Jian-Cheng; Ji, Xiaozhou; Gao, Theodore Z.; Wang, Yi-Xuan; Xu, Chengyi; Zheng, Yu; Yu, Zhiao; Gong, Huaxin; Matsuhisa, Naoji; Zhao, Chuanzhen; Lei, Yusheng; Liu, Deyu; Zhang, Song; Ochiai, Yuto; Liu, Shuhan; Wei, Shiyuan; Tok, Jeffrey B. -H.; Bao, Zhenan
• The Sustainable Development Goals: can they be made smarter? AI翻译
  作者：[Anonymous]
  摘要：Accounting for factors such as artificial intelligence in a more ambitious set of goals has a lot of merit - as long as urgency is not lost on the existing ones.
• MICROWAVE MYSTERY AS SPACE OBJECT PUZZLES SCIENTISTS AI翻译
  作者：[Anonymous]
• The respiratory system influences flight mechanics in soaring birds AI翻译
  作者：Schachner, Emma R.; Moore, Andrew J.; Martinez, Aracely; Diaz, Raul E., Jr.; Echols, M. Scott; Atterholt, Jessie; Kissane, Roger W. P.; Hedrick, Brandon P.; Bates, Karl T.
  作者单位：State University System of Florida; University of Florida; State University of New York (SUNY) System; Stony Brook University; Stony Brook University Hospital; Louisiana State University System; Louisiana State University Health Sciences Center New Orleans; California State University System; California State University Los Angeles; Western University of Health Sciences; University of Liverpool; Cornell University
  摘要：The subpectoral diverticulum (SPD) is an extension of the respiratory system in birds that is located between the primary muscles responsible for flapping the wing(1,2). Here we survey the pulmonary apparatus in 68 avian species, and show that the SPD was present in virtually all of the soaring taxa investigated but absent in non-soarers. We find that this structure evolved independently with soaring flight at least seven times, which indicates that the diverticulum might have a functional and...
• Work hardening in colloidal crystals AI翻译
  作者：Kim, Seongsoo; Svetlizky, Ilya; Weitz, David A.; Spaepen, Frans
  作者单位：Harvard University; Harvard University; Harvard University
  摘要：Colloidal crystals exhibit interesting properties(1-4) that are in many ways analogous to their atomic counterparts. They have the same crystal structures(2,5-7), undergo the same phase transitions(8-10), and possess the same crystallographic defects(11-14). In contrast to these structural properties, the mechanical properties of colloidal crystals are quite different from those of atomic systems. For example, unlike in atomic systems, the elasticity of hard-sphere colloidal crystals is purely...
• Acceleration of radiative recombination for efficient perovskite LEDs AI翻译
  作者：Li, Mengmeng; Yang, Yingguo; Kuang, Zhiyuan; Hao, Chenjie; Wang, Saixue; Lu, Feiyue; Liu, Zhongran; Liu, Jinglong; Zeng, Lingjiao; Cai, Yuxiao; Mao, Yulin; Guo, Jingshu; Tian, He; Xing, Guichuan; Cao, Yu; Ma, Chao; Wang, Nana; Peng, Qiming; Zhu, Lin; Huang, Wei; Wang, Jianpu
  作者单位：Nanjing Tech University; Nanjing Tech University; Fujian Normal University; Fudan University; Zhejiang University; University of Macau; Zhejiang University; Northwestern Polytechnical University; Northwestern Polytechnical University; Sun Yat Sen University; Changzhou University; Changzhou University
  摘要：The increasing demands for more efficient and brighter thin-film light-emitting diodes (LEDs) in flat-panel display and solid-state lighting applications have promoted research into three-dimensional (3D) perovskites. These materials exhibit high charge mobilities and low quantum efficiency droop(1-6), making them promising candidates for achieving efficient LEDs with enhanced brightness. To improve the efficiency of LEDs, it is crucial to minimize nonradiative recombination while promoting ra...
• Descending networks transform command signals into population motor control AI翻译
  作者：Braun, Jonas; Hurtak, Femke; Wang-Chen, Sibo; Ramdya, Pavan
  作者单位：Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne
  摘要：To convert intentions into actions, movement instructions must pass from the brain to downstream motor circuits through descending neurons (DNs). These include small sets of command-like neurons that are sufficient to drive behaviours(1)-the circuit mechanisms for which remain unclear. Here we show that command-like DNs in Drosophila directly recruit networks of additional DNs to orchestrate behaviours that require the active control of numerous body parts. Specifically, we found that command-...
• Human neuroscience is entering a new era - it mustn't forget its human dimension AI翻译
  作者：[Anonymous]
  摘要：The field is taking a leap forward thanks to innovative technologies, such as artificial intelligence. Researchers must improve consent procedures and public involvement.
• Ancient genomes reveal insights into ritual life at Chichén Itzá AI翻译
  作者：Barquera, Rodrigo; Del Castillo-Chavez, Oana; Naegele, Kathrin; Perez-Ramallo, Patxi; Hernandez-Zaragoza, Diana Iraiz; Szolek, Andras; Rohrlach, Adam Benjamin; Librado, Pablo; Childebayeva, Ainash; Bianco, Raffaela Angelina; Penman, Bridget S.; Acuna-Alonzo, Victor; Lucas, Mary; Lara-Riegos, Julio Cesar; Moo-Mezeta, Maria Ermila; Torres-Romero, Julio Cesar; Roberts, Patrick; Kohlbacher, Oliver; Warinner, Christina; Krause, Johannes
  作者单位：Max Planck Society; Max Planck Society; University of Basque Country; Max Planck Society; Eberhard Karls University of Tubingen; Eberhard Karls University of Tubingen; University of Adelaide; Pompeu Fabra University; University of Warwick; University of Warwick; Universidad Autonoma de Yucatan; Universidad Autonoma de Yucatan; Eberhard Karls University of Tubingen; Eberhard Karls University of Tubingen; Eberhard Karls University of Tubingen; Eberhard Karls University Hospital; Harvard University; Norwegian University of Science & Technology (NTNU); University of Texas System; University of Texas Austin
  摘要：The ancient city of Chich & eacute;n Itz & aacute; in Yucat & aacute;n, Mexico, was one of the largest and most influential Maya settlements during the Late and Terminal Classic periods (ad 600-1000) and it remains one of the most intensively studied archaeological sites in Mesoamerica 1-4 . However, many questions about the social and cultural use of its ceremonial spaces, as well as its population's genetic ties to other Mesoamerican groups, remain unanswered 2 . Here we present genome-wide ...