Blackbeard_ | 7 years ago | on: China's e-buses dent oil demand more than electric cars do
Blackbeard_'s comments
Blackbeard_ | 7 years ago | on: Atlas observes light scattering off light
They do try to mitigate this criticism in the first line of the article:
"Light-by-light scattering is a very rare phenomenon in which two photons – particles of light – interact, producing again a pair of photons."
This is the process that they observe (for the first time) whereas E144 observed the Breit-Wheeler process.
You can argue that this is too narrow a definition of light-by-light scattering but they have at least tried to make it self consistent...
Blackbeard_ | 7 years ago | on: Spotify to Apple: Time to Play Fair
RE: Football
Monopolies can have negative effects without trying to extract monopoly rents.
The competition between BT and Sky massively increased the TV rights price for e.g. the premier league, so the clubs got much more money. In theory, they used this to buy better players etc and increase the quality of the league.
Although you now have to pay twice, the quality of the product has gone up. So it's not a zero-sum game. You can argue that you don't think it's worth it, but that's an opinion, it's not true that it's an inherently worse situation.
Until they entered into a rights sharing agreement.
Blackbeard_ | 7 years ago | on: Could 'Oumuamua be an icy fractal aggregate ejected from a protoplanetary disk?
I don’t understand this comment... It’s true that the first event occurred after only two days but ligo have 11 events over two running periods at this point.
https://en.m.wikipedia.org/wiki/List_of_gravitational_wave_o...
Blackbeard_ | 7 years ago | on: What It Takes to Be in the 1% Around the World
Having a country-wide 1% must pull it down in some cases.
For instance in the UK if you bought the $4.1m London home on a 25 year, 3% mortgage, with a 25% deposit you'd pay about $170k per year. But after tax your $290k "top-1%" income would be about $185k -- only just enough to even cover your mortgage, forget about school fees.
I wonder what the London, NY, LA etc 1% numbers are? Surely that's a fairer comparison to e.g. Singapore anyway, since it's a city-state.
Blackbeard_ | 7 years ago | on: Researchers have observed the Lyman-alpha transition in the antihydrogen atom
That would be more than a 5 sigma difference which would definitely be significant but that number you're quoting for normal hydrogren is the 1S-2S line.
This measurement is the 1S-2P line which has an average frequency of ~2,466,051.625 GHz (there's actually two levels). Which agrees to within 1 sigma - i.e. good agreement.
Blackbeard_ | 7 years ago | on: Researchers have observed the Lyman-alpha transition in the antihydrogen atom
Yeah that's right, the red shift is just one contribution to the total uncertainty.
They're all listed in table I and the 4.2 * 10^-15 just comes from adding them in quadrature.
Blackbeard_ | 7 years ago | on: LHC physicists embrace brute-force approach to particle hunt
https://arxiv.org/abs/1710.07663
Those interested in a (somewhat) accessible view of where particle physics is at in a big sense could read this article from the head of our theory group at CERN.
Blackbeard_ | 7 years ago | on: LHC physicists embrace brute-force approach to particle hunt
The article is just discussing a type of data analysis. The machine runs the same way regardless.
Blackbeard_ | 7 years ago | on: LHC physicists embrace brute-force approach to particle hunt
The gist is that you would roughly look for deviations from theory on one (probably small) dataset, you'd identify any regions of interest and then run a proper analysis of that region on a different dataset to see if the effect is real.
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To put some numbers behind that it seems only ~1% of London's buses are electric whereas about a third are hybrid.
http://content.tfl.gov.uk/bus-fleet-audit-31-march-2018.pdf