Bookmarks for February 13th from 20:06 to 21:43

by danhon

This is an auto-posted collection of my public links posted to Pinboard.in for February 13th from 20:06 to 21:43:

  • The Parkland school shooting is bringing new surveillance tech to Marjory Stoneman Douglas High School. But will it work? – The Washington Post – "Your children are being watched. Their school has a surveillance system. A machine that spies on children every hour of every day. I know because I built it. I designed the machine to detect events that seem out of the ordinary, but it sees everything. Children where they shouldn't be, acting suspiciously, preying on other children. Children like yours. Activity your school administrators considered irrelevant. School shootings the government considered off-limits. They wouldn't act, so I decided I would…"
  • Most of that is actually because of the difference in fuel — Raptor runs on Met… | Hacker News – “The unit of Isp has no physical significance, the convention just arose because early rocketry was a collaboration of people who all used different units, and they wanted to be able to compare numbers. Since the unit they all shared was a second, and they all agreed (roughly) on the real value of g, they just divided exhaust velocity by their g to get a number that could be compared. The convention stuck.”
  • Well, sanity check. In 2017 the SLS launch was about 2 years out, but likely to… | Hacker News – “This strongly reminds me of the fact that late software projects are promised to be on time until about 6 weeks before launch, and then launch keeps getting delayed. And this is true no matter how late it eventually turns out to be. The reason why 6 weeks is the magic figure is that for a software project, that's the point where you can no longer paper over the inevitability of failure with wishful thinking. Rockets have slower schedule, but it is strongly looking like 2 years is a similar magic figure in that industry, for similar reasons.”
  • Do Animals Have Feelings? – The Atlantic – “Neuroscientists can measure the computational complexity of brain activity, but no brain scan has yet revealed a precise neural signature of consciousness.” – yeah but there was a brilliant Nature Futures (I think) short story about what if there were, though
  • AMEE/8XX-rfc: HTTP error codes for civilisational errors – Gavin Starks is amazing and I can’t believe I forgot about this