speakeron

6 ms·

1.
by speakeron 7mo ago
The temperature of the cosmic microwave background can be used as a universal clock.
2.
by speakeron 1y ago
It's actually Act 2, Scene 1 and is spoken by Polonius.
3.
by speakeron 1y ago
Oblate spheroids are round.
4.
by speakeron 1y ago
> Heathrow is massive and uses a lot of power (1-2MWh/day) It's 3 orders of magnitude more: 1-2GWh/day. https://www.heathrow.com/content/dam/heathrow/web/common/doc...
5.
by speakeron 2y ago
Just one ^n. Supermassive black holes are expected to have completely evaporated by 10^100 years.
6.
by speakeron 2y ago
It's not really whether it makes scientific sense or not, it's just that it's so very highly improbable (really, really improbable) that other explanations make more sense: the video's a fake, it's mass hysteria, or
7.
by speakeron 2y ago
The use of a space as a thousands separator has been around since the 1940s as recommended by the International Bureau of Weights and Measures and it was what we used when I was a kid at school in the UK. They specified it should be a thin
8.
by speakeron 2y ago
How can you tell from analysis of the physical circuit what assumptions the designer made about the flow of current? Surely the components (electrolytic capacitors, diodes, transistors, etc) are the same and can only work in one direction.
9.
by speakeron 3y ago
I think the problem with gas stoves is the nitrogen dioxide they produce. Do you have a meter for that?
10.
by speakeron 4y ago
They have different magnetic susceptibilities. Gold is diamagnetic (repelled by magnetism); tungsten is paramagnetic (attracted). A strong magnetic field (neodymium magnets) and sensitive scales can tell them apart. I built a small rig a fe
11.
Attention schema theory: A conceptual framework for consciousness(pnas.org)
2 points by speakeron 4y ago|0 comments
12.
by speakeron 5y ago
It's like the old joke about Vegans. "How do you know if a physicist is an MWI proponent? Don't worry, they'll tell you soon enough..."
13.
by speakeron 5y ago
You should take D3 with vitamin K2 (talk with your doctor first if you're on blood-thinning medications) to avoid calcium being dumped into soft tissues (K2 ensures it preferentially goes into bones). It's a good idea to get your
14.
by speakeron 5y ago
For the same field of view, a smaller sensor requires a decrease in the focal length; this leads to a greater depth of field. Moving to a medium-format camera will give less depth of field (and a large-format camera even less). Different se
15.
by speakeron 5y ago
> Not sure the source but there is a rule in fiction that everything has a purpose, as opposed to reality. If the camera stops in an axe, you can be sure someone is going to wield it later. That's from Anton Checkov. https:/&#
16.
by speakeron 5y ago
This is from the University of Zurich (UZH), not the ETHZ. They're different institutions (UZH is a cantonal university, ETHZ is a federal one).
17.
by speakeron 5y ago
On my screen, it's taking about 4s to scroll one light minute (15 times light speed). So if the map extended all the way to Proxima Centauri, it would take over 3 months of continuous scrolling to get there.
18.
by speakeron 5y ago
Quark is from Finnegans Wake, not Ulysses.
19.
Balloon test flight plan under fire over solar geoengineering fears(theguardian.com)
2 points by speakeron 6y ago|2 comments
20.
by speakeron 6y ago
A programmer walks into a bar, or not.
21.
by speakeron 6y ago
RAID 10 is more efficient (if that equates to performant) than RAID 6, but not more durable. In fact it's less. As an example, a 4-disk array (which has the same capacity in both RAID 6 and RAID 10) has 4 2-disk failure modes. RAID 6 c
22.
by speakeron 6y ago
It was this one from the Reina Sofia University Hospital in Spain (high dose of Calcifediol significantly reduced need for ICU treatment): https://www.sciencedirect.com/science/article/pii/S096007602...
23.
by speakeron 6y ago
https://outline.com/baunLT
24.
by speakeron 6y ago
https://outline.com/n56qHm
25.
by speakeron 6y ago
The problem with hardware RAID is that if the hardware fails, you need to replace that specific card with the same type to recover the data. If they're cheap enough and you want to go down that route, then buy two so you've got a
26.
by speakeron 6y ago
This thing is the size of Jamaica with a draft of 200m (and so a height of more than that). It would take multiple nuclear weapons to do it any real kind of damage.
27.
by speakeron 6y ago
My way of thinking of it is like this: imagine your eyes were located above and below your belly button (on a vertical axis). What would be 'flipped' when you look in the mirror?
28.
by speakeron 6y ago
The assumption of SETI has been that an advanced civilization is broadcasting a narrow-band (in the 'water hole' and possibly modulated) omni-directional signal using a large amount of energy. We can see stars across the galaxy (a
29.
by speakeron 6y ago
It's always worth remembering that O(n) describes the asymptotic limit where n is presumed to be very large (in fact, approaching infinity).
30.
by speakeron 6y ago
50 light years is the generally accepted distance that would cause problems. There are no candidates this close that could cause a type II supernova (this is when a massive old star, like Betelgeuse, collapses), but there could be potential

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