HeyJaredGordian Knot News
A road to cheap nuclear which humanity can and must have to solve energy poverty and global warming.
- Indexed issues, last 90 days
- 7
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- Sep 30, 2026
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- Jul 3, 2026
Latest issues
More on Fitting a 5PL to the RERF Data (opens the original)
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<img alt="" class="sizing-normal" height="1100" src="https://substackcdn.com/image/fetch/$s_!2sNg!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fbf440797-162f-48ca-aa85-fef1a179a24b_850x1100.png
A Weighted Least Squares 5PL Fit to the RERF Data (opens the original)
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This piece is technical SNT trivia. Important trivia, but technical trivia nonetheless. Unless you are interested in such minutiae, it can be skipped.The weak spot in the argument for SNT is the eyeball fit to the RERF data that SNT currently uses. Are we going to regulate radiation based on an octogenarian naval architecture’s judgement? That’s a tough sell, even if he is infallible.The RERF data has some basic problems. The binned mortalities jump up and down like a slinky. This isn’t normal s
Yet Another Look at the Karunagappally Data (opens the original)
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<img alt="" class="sizing-normal" height="659" src="https://substackcdn.com/image/fetch/$s_!c_nP!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc837de9d-e0dd-4135-905c-1f14942f0f25_1162x659.png"
Angela’s Adventure in Lintistan (opens the original)
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This story involves an old guy whom I will call Grump. For reasons that will become clear, the identities in this little drama must be protected. His ten year younger wife died six years ago, totally messing up Grump’s plan to die before his wife. Grump has a long history of plans that don’t work out as planned. Since then he has been cared for by his stepdaughter, Angela. Angela is an excellent housekeeper, a diligent and demanding shopper, better with tools than most men, and a world class coo
Rate SNT: the continuous version of SNT (opens the original)
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The post assumes familiarity with the Linear No Threshold (LNT) and Sigmoid No Threshold (SNT) radiation harm models. You must know what a dose rate profile (DRP) is; and hopefully have a feeling for why it is important in radiation exposures. The piece has much more math in it than I like, but I urge everybody to work through it. The result is important. Rate SNT helps explains why simplest SNT works as well as it does despite an obvious flaw. It has a number of attractive properties that simpl
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