hbrav

6 ms·

31.
by hbrav 2y ago
I'd be interested in what you set up in Cambridge, if you're happy to share?
32.
by hbrav 2y ago
I'm a Brit who has worked in finance and AI. I honestly want to move into building hardware. My background is physics, I want to build things that make the world better. But the businesses just seem absent. One of the UK's most ex
33.
by hbrav 2y ago
This sounds very similar to the method discussed in this podcast to detect rocket launches: https://www.armscontrolwonk.com/archive/1216884/detecting-mi...
34.
by hbrav 2y ago
This is very cool. I did my PhD in tidal interactions, but in the context of stars and giant planets - bodies that can typically be treated as having spheroidal symmetry. (In fact, one thing I was looking at was the corrections as you moved
35.
by hbrav 2y ago
This should interest you: https://meshtastic.org/
36.
by hbrav 2y ago
Maybe worth remembering that "trees" have evolved many times on earth. i.e. trees do not all share a common tree-like ancestor. The woody-trunk-and-branches pattern was just useful enough that it evolved many times. Which makes me
37.
by hbrav 2y ago
Cargo airships are not going to replace container ships, but they may well have their niche. One such use-case is prompt delivery of supplies that are urgently needed in high quantity in underdeveloped areas. For example, delivering some gr
38.
by hbrav 2y ago
The individual has impunity of the department has impunity? Not sure if you know this, but it might be of interest: in the UK speech, within the House of Commons (maybe the Lords too? I'm unsure) is specifically protected from defamati
39.
by hbrav 2y ago
This is extremely interesting, but reading the article left me wondering: why are experienced underwater archaeologists not involved in this? The only mention of any seems to be DRASSM, French government archaeologists who presumably had to
40.
by hbrav 2y ago
The difference is this: in a community centre pool, a diver doesn't give you compressed air to breath at the bottom of the pool. The thing the commentor above is concerned about is pulmonary barotrauma , a.k.a. "burst lung".
41.
by hbrav 2y ago
I believe you mean "social cues", not "queues".
42.
by hbrav 2y ago
You've got exactly the right image in mind: higher partial pressure of a gas in the lungs corresponds to a higher dissolved concentration of that species (H2, He, N2, O2, whatever) in the blood and tissue.
43.
by hbrav 2y ago
The problem with generalizing this to quarternions is that the conjugation operation for quaternions can be expressed using arithmetic operations on the quaternion: q* = -0.5 (q + iqi + jqj + kqk) So the analogy to complex analysis where we
44.
by hbrav 2y ago
This is very cool, and looks like it targets you wanting to look stuff up and I will probably use it at some point. But I feel that anyone looking at this and thinking "oh that's cool" should also try installing Stellarium (
45.
by hbrav 2y ago
Yeh, U[0, 1] is different because it assigns non-zero probabilities to intervals, not points. In this case we're assuming that we live in an uncountable population (each real in [0, 1] is a person), so you can't do things like ass
46.
by hbrav 2y ago
I think it's a little different. It's like asking "what is the probability that a given coin is in the round that the player wins?" But the St Petersburg paradox isn't about that, it's purely about how many coi
47.
by hbrav 2y ago
The dice room puzzle described here is a little frustrating, because no-one seems to get it right. In the finite population case the anthropic argument for "I'm likely to be the in the last round" is wrong. In the countably i
48.
by hbrav 2y ago
As you added more and more cotton candy you would begin to compress the centre under the pressure, and you would get some heating from this. I think there's a good change you would melt and cotton candy and eventually it would re-solid
49.
by hbrav 2y ago
The problem, if you read to the end, is that one half of the former couple is very happy with this outcome, and the other half is very much not.
50.
by hbrav 2y ago
> In some companies, the initial job contracts are misleading, and mention a nominal price of $0.01. Is he suggesting that the initial job contract does _not_ state the exercise price, and relies on the employee mistakenly thinking that
51.
by hbrav 3y ago
I think it's fair to say the 'discovery' that this boson exists came with the LHC experiments. But Higgs did discover in 1964 that the Higgs boson could explain why particles have mass. His paper couldn't say "thi
52.
by hbrav 3y ago
I'm afraid it becomes even worse when you learn that the concept of 'simultaneous' is ambiguous.
53.
by hbrav 3y ago
Consider a relatively bulky item, say, a package of paper towel. Probably takes up about a cubic foot of volume, which is 0.027 cubic meters. Suppose you drive that into NYC in a very small van, say a Ford Transit. A quick google tells me t
54.
by hbrav 3y ago
This seems like a general problem for a company like this: your great success demonstrates that your employees are incredibly valuable. And sometimes businesses may say things like "our people are our greatest asset", but that&#x2
55.
by hbrav 3y ago
The most significant change is that any attack on Sweden would require other NATO countries to come to Sweden's defence, and vice versa. It means that Sweden would also take part in more joint training exercises, share more intelligenc
56.
by hbrav 3y ago
A lawyer I know once pointed out that a good first step one receipt of anything like this is to reply with "Please provide me with the full name and address of your counsel so I may know to whom I should address subsequent corresponden
57.
by hbrav 3y ago
I think "wire only" means the hook catches while the wheels are still off the deck. I suppose that hard landing might have, in some ways, replicated the hard slam-down this would produce. Author, is that the case? Was the hard lan
58.
by hbrav 3y ago
The diagonal visibility actually looks quite poor. You could easily hide a dog, or a small child, standing close to the vehicle in the direction it's turning towards.
59.
by hbrav 3y ago
Boot?
60.
by hbrav 3y ago
They don't look very aerodynamic. But that snubby front end could give them excellent visibility, if done correctly.

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