&'a ::rynco::UntitledChannel pinned «新格伦 (New Glenn) NG-1 将在大约两个多小时后发射 (北京时间 13 号14:00, EST 13号 01:00) Scrubbed 新窗口: 北京时间 14 号14:00, EST 14号 01:00, 时长三小时 咕了 北京时间 16 号14:00, EST 16 号 01:00, 时长三小时 新格伦第一级使用七枚 BE-4 甲烷分级燃烧循环引擎 (和 ULA 的 Vulcan 一样）, 二级使用两枚 BE-3U 氢氧膨胀排放循环引擎 (真空优化版本的新谢泼德主引擎)。 NG-1会是…»
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Darkest and clearest skies at risk from industrial megaproject (Score: 150+ in 15 hours)
Link: https://readhacker.news/s/6kYbB
Comments: https://readhacker.news/c/6kYbB
Link: https://readhacker.news/s/6kYbB
Comments: https://readhacker.news/c/6kYbB
ESO
World's darkest and clearest skies at risk from industrial megaproject
On December 24th, AES Andes, a subsidiary of the US power company AES Corporation, submitted a project for a massive industrial complex for environmental impact assessment. This complex threatens the pristine skies above ESO’s Paranal Observatory in Chile’s…
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Flattening ASTs and other compiler data structures (2023) (❄️ Score: 150+ in 2 days)
Link: https://readhacker.news/s/6kV2X
Comments: https://readhacker.news/c/6kV2X
Link: https://readhacker.news/s/6kV2X
Comments: https://readhacker.news/c/6kV2X
www.cs.cornell.edu
Flattening ASTs (and Other Compiler Data Structures)
This is an introduction to data structure flattening, a special case of arena allocation that is a good fit for programming language implementations. We build a simple interpreter twice, the normal way and the flat way, and show that some fairly mechanical…