debasing_the_coinage

debasing_the_coinage t1_iyr7x38 wrote

Reply to comment by habeus_coitus in Powerful rare-earth free magnet is ‘evolved’ and refined by machine learning algorithm by TurretLauncher

Basically, yes. The crucial figure of merit, though, is the magnetic energy product, usually given in megagauss-oersteds (MGOe), which sadly is missing from the abstract. This is the product of remanence, the field that remains in a material after being removed from a polarizing field (all permanent magnets have to be "initialized" by exposure to a strong field), and coercivity, which you explained.

Unfortunately, cobalt, while not a rare earth, is not really that much cheaper than neodymium (cf. battery woes). So the battle is still between L10-FeNi, Fe16N2, and MnAl, all of which are, unfortunately, very hard to produce from their constituent elements. The other material MnBi has been known for a while, but bismuth, like cobalt, is "not rare-earth but rare". A similar technique was used to discover Co3Mn2Ge:

https://www.sciencedirect.com/science/article/pii/S1359645421002937

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debasing_the_coinage t1_iwora6f wrote

Reply to At CBD:THC ratios most common in medicinal and recreational cannabis products, no evidence found that adding CBD protects against the impairment or subjective effects of THC/cannabis - a randomised double-blind trial with 46 people. by drdrugsandbrains

>participants inhaled vaporised cannabis containing 10 mg THC and either

10 milligrams of THC is a relatively low dose, at which few adverse side effects (particularly anxiety/fear) would normally be present.

It's also noticeable in the appendix that the drop-out rate was noticeably higher in the 3:1 (highest CBD level) group. 10 participants in this group left the study, while no more than 3 left from any other group. Four of those were due to "unpleasant drug experience", two to "overintoxication".

I've taken more than 30 milligrams of CBD at a single time and it isn't that strong. Studies trialling CBD for schizophrenia or cancer have pushed the dose to hundreds of milligrams, which starts to show adverse effects but is apparently bearable. The authors don't comment on this peculiarity.

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