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This was OSI, and it had at least one elegant theoretical idea, which was the protocol stack -- a logical layers of how you go from copper wires to network applications.pic.twitter.com/mxOJi2cqJ8
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Came across some of my old CCITT/OSI books. I think the theory of the OSI stack is still taught in the classroom, but I suspect a lot of the lore will be forgotten.pic.twitter.com/ie2vCVxfww
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Wheeler's other book is also quite nice.pic.twitter.com/STKtPpzVWT
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To make things more complex, this roiling plasma conducts electricity, generating and absorbing magnetic fields.pic.twitter.com/NgnBBNsDmZ
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In 1947, Convair and Aerojet believed that H3 would be an excellent rocket fuel for the MX-774 ICBM, superior to ordinary liquid H2. They attempted to reproduce a published method for synthesizing it, but the experiment failed.pic.twitter.com/CJXnMLcX58
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Helge Kragh has written an excellent history of this controversial molecule, including early theoretical predictions of its structure. https://royalsocietypublishing.org/doi/10.1098/rsta.2012.0088 …pic.twitter.com/lr1xHiWNs8
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I like the limited muted color palette of the ceder trees behind my house, dusted with snow.pic.twitter.com/ge2M9ppSDb
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Glycerin and dry potassium permanganate ignite when mixed. But if they are dissolved in water, after a few minutes the solution instantly solidifies. (I edited out the minutes of me pouring the liquid back and forth)pic.twitter.com/cPT6rMcaOJ
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I always look forward to his videos reviewing advanced computer-graphics papers.https://www.youtube.com/watch?v=wsFgrzYwchQ …
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A two-foot pipe with thick copper walls has very little electrical resistance, which makes it a perfect demonstrator for Lenz's law. Dropping a spherical neodymium magnet, induced electric currents generate an opposing magnetic force that slows its fall.pic.twitter.com/RCHr6CvY7M
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This is a fun chemistry channel on YouTube. His video about silver is particularly pretty:https://www.youtube.com/watch?v=v-L4lUrEUlI …
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Talking about burning magnesium, I decided to light a small ribbon of it. Random factoid: magnesium is the most common metal in the universe.pic.twitter.com/M9WLQ90JN0
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One other detail, this is a photo of a spark chamber. You can see just to the right of me, a row of sparks from a cosmic ray going thru the charged plates and causing a discharge by ionizing the air.pic.twitter.com/mXsSNcfM01
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This was a CDC 6638 file system, also called an 808 disk drive. We also had one at the University of Minnesota. 72 platters, 26 inches in diameter, stored about 150 Mb. It had very fast transfer speeds for the time.pic.twitter.com/RdIxNOZ6Mg
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The main control room and one of the monitors seen all around the site.pic.twitter.com/cgKNegWE3b
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The first two stages of the accelerator, a Cockroft-Walton generator (something like a million volts) inside a Faraday cage. Next a linear accelerator fed a small booster ring, which in turn fed the main ring.pic.twitter.com/rcUN3NYCZ6
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Fermilab used about $500,000 of electricity a year, in 1977 dollars. I thought I had a photo of the giant capacitor bank used to provide surges of power, but I found one online.pic.twitter.com/4yd5Rw5XJ8
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