作者：Roederer, Ian U.; Vassh, Nicole; Holmbeck, Erika M.; Mumpower, Matthew R.; Surman, Rebecca; Cowan, John J.; Beers, Timothy C.; Ezzeddine, Rana; Frebel, Anna; Hansen, Terese T.; Placco, Vinicius M.; Sakari, Charli M.
作者单位：University of Michigan System; University of Michigan; Carnegie Institution for Science; United States Department of Energy (DOE); Los Alamos National Laboratory; United States Department of Energy (DOE); Los Alamos National Laboratory; University of Notre Dame; University of Oklahoma System; University of Oklahoma - Norman; State University System of Florida; University of Florida; Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT); Stockholm University; National Science Foundation (NSF); California State University System; San Francisco State University
摘要：The heaviest chemical elements are naturally produced by the rapid neutron-capture process (r-process) during neutron star mergers or supernovae. The r-process production of elements heavier than uranium (transuranic nuclei) is poorly understood and inaccessible to experiments so must be extrapolated by using nucleosynthesis models. We examined element abundances in a sample of stars that are enhanced in r-process elements. The abundances of elements ruthenium, rhodium, palladium, and silver (...
作者：Mercer, Theresa
作者单位：Cranfield University
作者：Kuang, Xiao; Rong, Qiangzhou; Belal, Saud; Vu, Tri; Lopez Lopez, Alice M.; Wang, Nanchao; Arican, Mehmet Onur; Garciamendez-Mijares, Carlos Ezio; Chen, Maomao; Yao, Junjie; Zhang, Yu Shrike
作者单位：Harvard University; Harvard University Medical Affiliates; Brigham & Women's Hospital; Duke University
摘要：Volumetric printing, an emerging additive manufacturing technique, builds objects with enhanced printing speed and surface quality by forgoing the stepwise ink-renewal step. Existing volumetric printing techniques almost exclusively rely on light energy to trigger photopolymerization in transparent inks, limiting material choices and build sizes. We report a self-enhancing sonicated ink (or sono-ink) design and corresponding focused-ultrasound writing technique for deep-penetration acoustic vo...
