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Cake day: March 31st, 2025

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  • i don’t think that a washed out royal surrounded by iranian version of cubans from miami would be very consequential, however if you compare scale of political persecution between pahlavi and islamic republic eras, this makes savak look downright humanitarian, and i don’t think he would be able to make situation worse either. if my calculator and judgement of sources is correct, then 43k dead protesters mean that islamic republic in two days outdid past 100 years of political repression, twice.

    also, islamic republic heavily exaggerated pahlavi’s brutality in their propaganda, especially early on. for example in constitution there’s mention of “60000 martyrs” but even their own revised estimates for 1979 casualties are over 20x lower










  • the talk about water content in soil was bad but the topic itself was interesting

    things that fella got wrong: TDM moisture meter works by measuring what effectively is electrical length of waveguide formed by 2 electrodes and soil around it. more water = higher dielectric constant = longer delay for reflection, this only measures as deep as probe goes and the rest is fitted from model

    neutron detector works just like geiger tube except gas has large cross-section for reaction with neutrons, that gives charged products that begin a spark which is counted. in train, steel doesn’t interfere but diesel fuel will. the trick is that cosmic neutrons are counted separately from reflected neutrons, because cosmic neutrons are hot and reflected neutrons are thermal and how much of reflected ones is there depends on water content in the soil. helium does not run out. the more helium you have the faster counts go and you can move faster while measuring with decent precision. the lead shield in train is for getting rid of radiation from granite aggregate under rails, because it contains tiny amounts of uranium and gammas from decay chain would add to noise - lead does not interfere