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What Does "Signalling" Mean?

It does not follow for me, say "yelling" is a type of "talking" this we all agree.

but when I say "I am yelling" I am giving more/different information than just "I am talking"

sure mere "assertion" is a type of "signalling"

but for me when we use "signalling" I infered that we are doing things differently than "asserting"

is this what you mean?

Covid 9/10: Vitamin D

but there is a great body of work proving that Vit D is beneficial for treating respiratory infection in general [I can cite on request] so unless most respiratory infections secretly involved cytokine storm [which I don't believe to be true] or Vit D is beneficial in other ways than what you suggest.


comment above suggested that the benefit is from Vit D prevent the pneumonia from covid from getting worse, and I found the argument persuasive

Covid 9/10: Vitamin D
– A study in Indonesia found that out of the patients that died from COVID-19, 98.9% of them were deficient in vitamin D, while only 4% of the patients with sufficient vitamin D died.
-A study of patients in New Orleans found that 84.6% of the COVID-19 patients in the ICU were deficient in Vitamin D while only 4% of the patients in the ICU had sufficient levels of Vitamin D.
-A study in the Philippines found that for every standard deviation increase in vitamin D people were 7.94 times more likely to have a mild rather than severe COVID-19 outcome and 19.61 times more likely to have a mild rather than critical outcome.

I would be highly skeptical of this since it came from a facebook post and I have not been able to verify the content. If someone else can do the leg work to independently verify what had been said?

Efficacy of Vitamin D in helping with COVID

>>> 2. Death rates in countries with high incidence of vitamin D deficiency e.g. Belgium, Italy, versus those with low levels (Scandinavia even Sweden, who eat oily fish and supplement/fortify).

if you don't mind expanding on this, Germany however have very low fatality rate, yet for data as of 2015 they have the same level of vit D deficency as Italy

Has LessWrong been a good early alarm bell for the pandemic?

as someone who is working in ED in Australia, I can say that Lesswrong has been consistently predict the behaviors of my hospital management by 2-3 days.

for example: I've read a lesswrong post arguing that covid-19 is serious and people should stock up while my manager was still telling us to just calm people down if asked. The stance was reversed 2-3 days later.

Slatestarcodex recommended the wide spread use of masks a whole week before my local health district recommened the same thing.

I am not certain that being slow is not part of the system design. but Lesswrong has allow me to predict future hospital policies quite consistently.

CO2 Stripper Postmortem Thoughts

I just skimmed the article, but given that you already willing to make suck huge investment in capital and space, I just got a feeling it's easier if you just have a grow room or an algae bio-reactor running at night. the immediate benefit would be the hardware are available in consumer form and most of the design parts have been attempted.

This way the on going cost would only be marginally higher [back of envelope calculation] and you would reap other benefit beside. [food or algae oil]

CO2 Stripper Postmortem Thoughts

yeah, I dropped the ball on that one, the grow box is out but I got a feeling a grow room is still possible but this is splitting hair.

I am wondering if I also dropped the ball on the algae claim

CO2 Stripper Postmortem Thoughts

I vaguely remember the 4 g/L/day but on further inspection, I now realise that we can't ever reach that efficiency. If we use the 1 g/L/day but human use 1kg/day (they use less in sleep don't they?) divided by 2/3 it would be about 1.5 m3 (still quite big) and we have to account for the actual foot print which would be much higher (2x higher? 3 m3?).

I am tempted to argue that we don't have to match the CO2 production rate so perfectly since the CO2 should naturally diffuse a bit, but let's leave some margin of error on our side.

for the total volume, can't we just continuously filter out the algae to retain the optimal condition while barely increasing total volume? and since we only use it at night, the total volume need would be less. If we automatically drain it to a hidden larger tank or press it straigth to oil in the basement we maybe saving effort here but increasing volume.