All of streawkceur's Comments + Replies

Deep learning is a general method in the sense that most tasks are solved by utilizing a handful of basic tools from a standard toolkit, adapted for the specific task at hand. Once you’ve selected the basic tools, all that’s left is figuring out how to supply the training data, specifying the objective that lets the AI know how well it’s doing, throwing a lot of computation at the problem, and fiddling with details. My understanding is that there typically isn’t much conceptual ingenuity involved in solving the problems, t
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Let's assume that half of the deaths of currently infected people have happened, due to the lockdown extending the doubling time from three days to more than a week.

How do you draw that conclusion?

4[anonymous]
The effects of measures on the spread take weeks to show up in the data. If the doubling time hadn't cratered, the hospitalization rate would've remained exponential. At the time of posting it was comparatively flat, and I estimated. The half came from the fact that it usually takes ~3 weeks to die, that the exponential spread had only stopped a few weeks earlier, and a drawing of a triangle and square representing a rise and flat that I drew a vertical line through.

According to this article, it seems clear by now that low oxygen is in fact dangerous even when you feel fine, so buying a pulse oximeter is useful.

https://www.nytimes.com/2020/04/20/opinion/coronavirus-testing-pneumonia.html

1. I think the "calibration curves" one sees e.g. in https://slatestarcodex.com/2020/04/08/2019-predictions-calibration-results/ are helpful/designed to evaluate/improve a strict subset of prediction errors: Systematic over- oder underconfidence. Clearly, there is more to being an impressive predictor than just being well-calibrated, but becoming better-calibrated is a relatively easy thing to do with those curves. One can also imagine someone who naturally generates 50 % predictions that are over-/underconfident.

2.0. Having access to "basel... (read more)

I think your argument can be strengthened by multiplying all the animal-year-values by 1000 - this would yield a value of veganism of 430 $/year, which is still less than what eating meat would be worth to a typical LW user, and yields values for the worth of animals that are probably higher than what most vegans would claim.

Why are surgical or self-made masks supposed to be better at protecting others than at protecting oneself? Naively, it seems to me that the percentage of filtered droplets/aerosol should be the same regardless of the direction in which it is breathed.

1muchcharles
Aerosolization maybe happens more after exposure to air where water evaporates off of the lipid/protein shell. On exhale into mask it hasn’t had as much time to evaporate and is in humid environment, on inhale brought mask it has made its way over from another person and has had more time to aerosolize in drier air.
5clone of saturn
I think it's mostly because the mask slows down the flow of exhaled air, which reduces the distance the droplets travel before they evaporate or fall to the ground. You can see this illustrated here and what happens without a mask here.
1Remoddy
Don't know about percentage of filtered droplets/aerosol in both directions, but I would guess the reasons include: 1. A mask doesn't protect your eyes 2. You are likely to touch contaminated outer surface of your mask (and then touch your mouth, scratch your eye etc and get infected), but other people probably won't touch the inner surface of your mask.

I'd like to point out that the growth in India is still exponential (linear on the log-scale) https://www.worldometers.info/coronavirus/country/india/. This could be or become true of other developing countries.

India and other developing countries probably have a harder time controlling the outbreak (and governments and the young, food-insecure populations may judge the economic cost of social distancing to be higher than the risk of the virus).

There was a time when the number of worldwide cases appeared to stagnate because of the Chinese lockdown, but thi

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EDIT: The South Korean press releases contain a chart somewhat like the one I wanted, see e.g. https://www.cdc.go.kr/board/board.es?mid=a30402000000&bid=0030

I am looking for a better overview of imported cases by country of origin in East Asian countries.

EDIT: I remembered incorrectly, the following is wrong. In particular, I recall a statistic according to which a significant number of imported cases in South Korea in one day ~1-2 weeks ago came from China (~12, vs ~40 Europeans).

If this is true, this would seem to me like strong evidence that China i

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Are there statistics/tables listing not only infections, but also not-infections with circumstances (X was quarantined because of contact with Y, but turned out to be negative)? This might help to assess the risk associated with certain situations (quickly buying something in a store, conversation in open air with distance, in a closed room etc.)

I actually think it is plausible that governments and/or Facebook do this, and it becomes widely enough adopted.

A community-level risk score would already be helpful ("based on estimates in your locality, the risk of contracting the virus when taking a bus is X now...) for individuals.

2gwillen
Yeah, I think something at the government (or google/facebook) level would be a lot more effective. (Of course, people might have some qualms. China already did it, of course, and it's mandatory -- but that's China.)

Are there attempts to build an app that tracks everyone by GPS, and notifies all possible contacts (and people having been in the same supermarket etc.) when someone develops a cough?

It seems to me that, with a majority of people using such an app, the R0 could easily be pushed below 1 without too many restrictions. I think this could even work when using the app is on a voluntary basis - I guess that people making wrong statements in such an app and getting someone sick amounts to negligent assault in many countries.

I don't believe the claims that 60% of

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2gwillen
There are at least two attempts I'm aware of to do almost exactly this, surely more that I'm not aware of, plus some attempts to do other modeling (like, using people's tracks from fitness apps, so they don't have to install a new app.) I think it's going to be really unlikely to get enough people to use something like this to be useful, but I'd love to be wrong. If you want to help I'm happy to direct you to them.