Satoru OKAMOTO/岡本聡

Hit me with the craziest math facts you know.

REST API設計で「とりあえず全部POSTで」ってやるやつ、HTTPメソッドの意味を100回読み直せ。GETで取得、POSTで作成、PUTで更新、DELETEで削除。これすら守れないAPIは使う側が地獄。

Everyone knows that the Space Launch System uses reflown Space Shuttle parts. But I feel people arent able to grasp just how much history goes into the rocket set to send humans around the Moon for the first time in 53 years. So heres a thread on the reused parts of Artemis II:

最近国立大の研究者が大手私大に移動する流れが加速しているようですが、大丈夫でしょうかね？東北大や科学大など、卓越大に指定された大学だけが潤い、他が死滅するという構図は到底好ましいとは思えないのですが…。

NASA spent $4.1 billion to launch Artemis II, the first crewed moon mission since 1972. Seven hours in, Commander Reid Wiseman called Houston because Microsoft Outlook was broken on his tablet. He’d already tried turning it off and on again. It didn’t help. “I have two Microsoft Outlooks and neither one of those are working,” Wiseman said from Orion, currently on a 10-day trip around the moon. Why two Outlooks on one device? Because Microsoft ships two different email apps and calls them both “Outlook.” This has confused office workers for years. Apparently it follows you to space. Wiseman asked Houston to remote into his tablet and fix it. So NASA did exactly what your company’s IT department does, logged into his machine, poked around, got it working. Except the user was on his way to the moon. The tablet is a Microsoft Surface Pro loaded with Microsoft 365. NASA has a $100 million contract for those licenses across the agency. The crew uses them for email, schedules, and checking mission info. Same software your office runs, same headaches your office has. The computers actually flying the spacecraft are a different animal entirely. Two custom flight computers, built to survive the kind of radiation that would fry a normal laptop in seconds, running software built by Lockheed Martin. 20,000 times faster than what the Apollo astronauts had. If one computer dies, the other takes over instantly. These control life support, steer the ship, and handle every communication back to Earth. The Surface Pro runs Outlook. One half of Orion’s computing can survive cosmic radiation thousands of miles past the moon. The other half can’t stop two email apps from crashing at the same time. I looked up the history of space software bugs and it puts the Outlook thing in perspective. In 1999, NASA lost a $328 million Mars probe because one engineering team measured thrust in pounds and another used the metric system. Nobody caught it. The spacecraft came in too low and burned up in the Martian atmosphere. In 1962, a single missing symbol in a line of code destroyed a probe called Mariner 1 just 293 seconds after launch (under five minutes). That typo cost about $190 million in today’s money. Those bugs destroyed entire missions. Wiseman’s Outlook got fixed in a few hours. So did a toilet fan that jammed two hours after launch (in zero gravity, a broken toilet is a real problem). The computers keeping four humans alive at 25,000 mph around the moon never flinched.

平安の時代から5·7·5 とか 5·7·5·7·7 だけで満足してしたんやぞ 140字も与えたらそりゃハマるわ