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March 21, 2021 Archives
Sunday, March 21, 2021
CONTEXT: Five-Position Switch
— Evil Mad Scientist (@EMSL) March 21, 2021
This is what, in computer language design, is called “syntactic sugar”.
Posted at
14:33
CONTINUITY: Energy Storage in Electronically Excited Solid Helium
A short @NASAJPL paper discussing energy storage in 'electronically excited solid helium': https://t.co/BTSeweIwNn
— ToughSF (@ToughSf) March 20, 2021
A metastable state of helium can last for 10,000 seconds and store '20 eV', which I think means 482 MJ/kg. pic.twitter.com/SiGZfalBnO
The JPL Technical Memorandum [PDF] from September 1973 notes that if the stability of the “He IV” phase is demonstrated, it might be possible to induce the phase electrically and trigger the release of the energy from the metastable state.
Posted at
13:29
TRACKING WITH CLOSEUPS: The DC-10 Cargo Door: American Airlines Flight 96, June 1972
As mentioned at the very end of this video, the failure of the FAA to mandate fixes to the DC-10 cargo door locking mechanism via an Airworthiness Directive after the American Airlines Flight 96 accident would lead to the loss of Turkish Airlines Flight 981 and all 346 on board in March, 1974.
Posted at
12:29