immmmmm

24 ms·

241.
by immmmmm 5y ago
it's actually more group representation theory you'll need: the rotation group has an infinite number of representations acting on different vectors spaces, rotation of an electron in 3d is SU(2) which maps to SO(3), the rotation
242.
by immmmmm 5y ago
after having spent a third of my life in academia i don't see this happening: everyone want as many as possible articles, if possible in the most high impact journals. detecting fraudulent or irrelevant pieces is against that goal.
243.
by immmmmm 5y ago
just read a piece saying that for young teenager girls, saying no to an older man is just part of the toolbox, the most universal "rite of passage" towards adulthood: https://www.theguardian.com/commentisfree/
244.
by immmmmm 5y ago
as a former physicist i couldn't agree more. in fact you can construct a lagrangian almost uniquely from the underlying symmetries of the system. it's literally the most used tool in theoretical physics, and it's so powerful
245.
by immmmmm 5y ago
i might have an even more unpopular opinion: we might have too many cars.. in switzerland, we have 6.3 mio cars for 8.4 mio ppl, almost none of my friends have one, i just don't understand how it's even possible. but what's s
246.
by immmmmm 5y ago
thanks for the very interesting story. i never went beyond the prototyping stage for the products i designed. i always thought that small scale production would be an easy next step. i understand how wrong i could have been thinking it was
247.
by immmmmm 5y ago
while i have almost no use of this software, it's one of the most powerful open source tool around. i wish there was a similar effort to make Freecad more reliable (my bad not helping btw). also this has already been discussed and seem
248.
by immmmmm 6y ago
i disagree with the less waste argument. there is clearly a rebound effect here: by making the price cheaper and significantly increasing the mass that goes to orbit you eventually generate more waste.
249.
by immmmmm 6y ago
will they unionize?
250.
by immmmmm 6y ago
good points! having worked a bit in a close field i'd add: [ ] is impossible to recycle
251.
by immmmmm 6y ago
it's not uncommon that things get published below the five sigma bar, you would get one paper every decade else.. however 3 sigma is not enough, things get quickly back to noise in this field.. unfortunately, i left theoretical physics
252.
by immmmmm 6y ago
thanks for the precisions! i fear however no one wants to rule on that, at least for now.
253.
by immmmmm 6y ago
this applies to everyone but only the rich has the money. the technology almost didn't change since von Braun in 1940, go have a look at a V2 turbopump and compare with the latest Barber-Nichols models. sure metal alloys changed a bit,
254.
by immmmmm 6y ago
by whom? the FCC. i live in switzerland, does USA own LEO?
255.
by immmmmm 6y ago
am i the only person thinking that there should be laws to prevent rich individuals to increase the mass in LEO by a factor 10 in less than 10 years? i understand the enthusiasm but shouldn't these decisions let to the people, countrie
256.
by immmmmm 6y ago
yes, that's the only system that makes sense to me for small objects. with a good international policy that prevents ppl from missiles at satellites to show power and, maybe, also one that prevent ppl to put any crap in LEO now it has
257.
by immmmmm 6y ago
curious of the price of de-orbiting an m6 screw (say m = 4g, v = 8000m/s) given it has the same kinetic energy as a small car (m = 1000kg v = 16m/s).
258.
by immmmmm 6y ago
Louis Rossmann's youtube channel is a great source of information on this topic.
259.
by immmmmm 6y ago
If your ready paying your camera the price of a small car, Xenics has a few alternatives that work well. They also have a support team who replies to your questions. It's important to note that some technologies (Micro-bolometers, InGa
260.
by immmmmm 6y ago
i remember finding one board of it in a drawer at my university. it instantly felt like a special piece of electronic history, even before i realized it was a cray! (i ran to the old cray in display in the hall and indeed was a board for it
261.
The ethical questions that haunt facial-recognition research(nature.com)
1 points by immmmmm 6y ago|0 comments
262.
by immmmmm 6y ago
i feel smart now ==> thx, lol too
263.
by immmmmm 6y ago
As the math teacher at the first year of university once said: "i know two things: [cos(x)]^2 + [sin(x)]^2 = 1 i*i = -1 but can re-derive all the rest"
264.
by immmmmm 6y ago
they also offer a good alternative to wetransfer: https://www.swisstransfer.com/fr i'm hosting a website and cloud server by them and quite pleased so far.
265.
by immmmmm 6y ago
I'm a former string theorist and no, it didn't produce a prediction here. The problem with getting predictions out of ST is that you need to find a vacuum (ground state) with 3 macroscopic space dimensions and no scalar fields (ex
266.
by immmmmm 6y ago
Removing carbon from the atmosphere is a fight against the second law of thermodynamic. To win a fight against Entropy one needs energy, and typically a lot of. My question is simple: where do we find enough energy to capture the carbon tha
267.
by immmmmm 6y ago
I agree somehow, in academia we often create glitter (we call that "innovation") to make us feel useful for civilisation. In the end everyone just fight for her/his own ass. But you know, i'm more willing to write applic
268.
by immmmmm 6y ago
> All the sugary drinks that just give you health issues (...) > Evil is everywhere, really. i know, i live 10km from Nestlé HQ. and the banks in my country manage a significant part of the cash in this world. > Our brains are not
269.
by immmmmm 6y ago
strings and dualities https://arxiv.org/abs/1109.4280
270.
by immmmmm 6y ago
ok, that was a bit of my original question (not well asked). i understand any civilisation needs funding to grow (do we need growth is another core question), and possibly market to do so. yet any meaningful decision won't be made at t

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