wcoenen

66 ms·

781.
by wcoenen 7y ago
It's ironic to me that the post starts with a twitter poll, because I don't get twitter either, and I've tried. And I'm even a bit younger than the poster.
782.
by wcoenen 7y ago
Wrong side of the trade, buying puts is like buying insurance; it's a bet that the price will go down further, while OP wants to bet that an overreaction has happened. You'd have to write puts (thereby earning the premium) or bu
783.
by wcoenen 7y ago
> Because the curve is almost not rising, even in linear form That's the global numbers, which are still dominated by China. In China there may have been a real slowdown thanks to draconian measures. But have a look at the WHO numbe
784.
by wcoenen 7y ago
It's pretty random. It's mostly caused by gravitation from the sun and moon, and counteracted by the Earth's spin; faster spin would mean slower precession.
785.
by wcoenen 7y ago
The seasons are caused by the orientation of the Earth's tilted axis relative to the sun. E.g the north pole is tilted towards the sun during summer of the northern hemisphere, and away from the sun in winter. Now imagine the Earth bei
786.
by wcoenen 7y ago
> That means that when the clock strikes midnight on New Year’s Eve, Earth hasn’t quite circled all the way back to its starting point. Circling back to the starting point would be a sidereal year, which isn't what we want either.
787.
by wcoenen 7y ago
> a better approximation of evaluating your survival chances is to look at the death to recovery rate (dead / (recovered + dead)) This formula is still fundamentally wrong because it assumes that the time between infection and death
788.
by wcoenen 7y ago
> If you use deaths/(deaths+recoveries) you get a much higher figure You also have to take into account that mild cases are probably never detected and counted. So you are calculating the fraction of deaths among severe cases, not a
789.
by wcoenen 7y ago
> What exactly worries you about mass hysteria and panic? Why would that be worse than what is likely to happen as Covid-19 spreads outside of China? Think houses getting torched because the inhabitants are suspected of having the viru
790.
by wcoenen 7y ago
> The graphs of numbers of confirmed infected all seem to be bending down Those numbers are dominated by the reports from China. If you look at just the cases outside China, then those are still on an exponential curve with a doubling ti
791.
by wcoenen 7y ago
Are we sure that it doesn't? This news is from 7 years ago.
792.
by wcoenen 7y ago
> it's amazing how much it glows It doesn't glow by itself, and it is unrelated to radioactivity. It's just fluorescence under a blacklight.
793.
by wcoenen 7y ago
Finding lots of simple life wouldn't be great news for our future either, because it rules out abiogenesis as one of the great filters. And each time we rule out a potential great filter behind us, the potential ones ahead of us become
794.
by wcoenen 7y ago
The history of this is that at some point, Arab mathematicians settled on a small pen stroke to separate decimals. When this got typeset, people found it convenient to just reuse the point or comma. Different countries made different choice
795.
by wcoenen 7y ago
Possibly the spymesat app. If you create an account and log in, apparently you can select satellites and task it to take images for anywhere between $500 to $3300.
796.
by wcoenen 7y ago
In the paper they wrote "Only six genes had distant homologs in public databases". So the title is even more misleading than that. https://www.biorxiv.org/content/10.1101/2020.01.28.923185v1....
797.
by wcoenen 7y ago
> our best option is probably solar shades in low earth orbit (giant sheets of ultra thin foil) A thin reflective foil would not stay in a stable orbit because of solar radiation pressure. Instead, you can put it near the L1 Langrange po
798.
by wcoenen 7y ago
It's not odd if you read the article that you linked. It explains that ARK does not allow more than 10% weight for any position, so they had to sell some Tesla shares to rebalance.
799.
by wcoenen 7y ago
> atmospheric noise would dominate, even at 20km 20 km distance between the satellites, not 20 km altitude! Those satellites actually have an elliptical orbit with an altitude between 276 km and 1010 km.
800.
by wcoenen 7y ago
> I've heard there's a hole in the ozone and we're all going to die from cancer The reason you don't hear that anymore is not because there was no problem, but because the problem has been fixed by the implementation
801.
by wcoenen 7y ago
How do you know which side of a blockchain fork is the double spent, and which is the original?
802.
by wcoenen 7y ago
The advantage of lidar is not swivelling, but that it directly provides distance information (whereas with cameras you need to extract that from the parallax of two images). It's not clear to me what advantage a swivelling camera would
803.
by wcoenen 7y ago
I only got interested in investing at the start of 2018, and I was very nervous at the time about getting into a bull market that had been going so long. But at the same time, I was also nervous about inflation and not putting money to work
804.
by wcoenen 7y ago
> massive chunk of the population lives in absolute poverty 30 years ago yes, but not anymore. https://data.worldbank.org/indicator/SI.POV.DDAY?locations=C...
805.
by wcoenen 7y ago
I think the more relevant equation is a=𝚫v²/(2d) which gives you the acceleration needed to realize a speed change 𝚫v over a distance d. Larger cars allow for a larger d, therefore a smaller peak acceleration in crashes. edit: I just r
806.
by wcoenen 7y ago
Memorize it in the form of a BIP-39 mnemonic[1]. 12 words are enough to encode 128 bits of entropy and a 4 bit checksum. [1] https://github.com/bitcoin/bips/blob/master/bip-0039.mediawi...
807.
by wcoenen 7y ago
That only works if the vehicle in front of you is lower than your own, right? So people will have to get into an arms race and buy higher and higher vehicles to keep that advantage.
808.
by wcoenen 7y ago
Nobody saw Bitcoin coming. (The first block had already been mined at the start of 2009, but there was no real exchange trading until later in 2010.)
809.
by wcoenen 7y ago
There were indeed real nuclear reactors with thermoelectrics being launched in the cold war. However, thermoelectrics have an efficiency well below 10% (maybe a bit better with this improvement but not much). For that reason, future reactor
810.
by wcoenen 7y ago
I think you are thinking about an RTG instead of an actual reactor.

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