jm + filters   2

Thomas Talhelm's DIY air purifier
Simply strap a HEPA air filter to a desk fan for $30:
I tested it over and over—hundreds of days, with a control room, with a stronger fan, against the big brand purifiers that I borrowed from my rich friends. Eventually, I saw enough data that I was convinced. This $30 DIY purifier was removing significant amounts of tiny particulate from my Beijing bedroom. I wanted to tell the world that those $1,000 purifiers were ripoffs. I made all the data and testing methods open source. I wrote up the instructions for how to make one.
air  air-quality  beijing  hepa  filters  filtering  diy  hacks 
12 days ago by jm
Hamlet is Banned in the British Library
Pretty hilarious account of the usual, run-of-the-mill overblocking in the British Library from last weekend:
I asked [the information desk] if they saw the problem, perhaps just the symbolism, of Hamlet being banned in the British Library. They shrugged. The IT department said there was nothing to be done, as it was only the British Library's wifi service that was blocking Hamlet, and the British Library's wifi service, they seemed sure, had nothing to do with the British Library. They were merely ships that passed in the night. Children crying to each other from either bank of an uncrossable river.
censorship  filters  overblocking  hamlet  shakespeare  literature  funny  sad  british-library  blocking 
august 2013 by jm

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