U.S. Air Force Confirms TU-2S Dragon Lady Broke Endurance Records
The historic flight, which was 11 years in the making, saw the TU-2 flying longer than 14 hours and traveling over 6,000 NM across all 48 contiguous states of the U.S. On Aug. 1, 2025, we reported about a Lockheed U-2 aircraft which was heard communicating to air traffic control about the intention
Quality adjusted life years: A history
大多数卫生经济学家都知道质量调整后的寿命（Qalys）。但是，为什么它们在英国如此广泛使用，但在美国不使用？ Mackillop和Sheard（2018）的论文提供了QALY的有趣历史，值得一读。为了让Qalys有用，首先有…
