19h
revised Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
added 247 characters in body
19h
answered Why is Xenon favored as the propellant in electric thrusters?
1d
comment Validity of topological thermodynamics?
It might still be wrong, no doubt about that. But verifying that usually requires more in-depth analysis and more eyes over the ideas. There is no easy way to validate science, but what you are doing is exactly the right thing: find other opinions, raise attention to the subject. Who knows? maybe his/her ideas are valid, and they are simply poorly known by the community. That happens a lot
1d
comment Validity of topological thermodynamics?
is not unheard that scientific ideas or specific original viewpoints sometimes are promoted by a single person. Usually a first pass over a text can bring to attention factual errors that might point to what you would call a 'crackpot', but if errors are not evident on a first read to someone at least aquainted with the subject matter, is not fair anymore to call it 'crackpottery'.
2d
comment Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
I tried to reach Ido Kaminer by his fb and academia.edu profile, but he hasn't replied on either yet. Couldn't find an academic address or email. I didn't thought about contacting the other co-authors, maybe I should
2d
awarded Announcer
Jan
22
revised Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
added 6 characters in body
Jan
22
comment Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
could you rephrase that again? what does it mean 'as usual'? I'm missing the point
Jan
22
comment Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
the fact that they put emphasis in that 'acceleration is indistinguishable from an EM field' makes me think that it should. I wrote the author today, let's see if he replies
Jan
22
comment Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
my observation is that if 'acceleration' here means 'particles end up with higher momentum' then thrust must be an unavoidable consequence. On the other hand, if 'acceleration' here is meant with some nuance to mean some related kinematic concept of waves that is unrelated with actual momentum, then I guess it won't help
Jan
22
comment Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
certainly total energy and total momentum is conserved in all cases. But in a rocket of any kind, the interesting quantity is transfer of momentum between propellant and ship.
Jan
21
comment Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
Oh well, me too :.(
Jan
21
revised Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
added 172 characters in body
Jan
21
asked Self-Accelerating wavepackets: What are they and can they impulse a spaceship?
Jan
19
accepted Discretizing regions with pointy boundaries
Jan
18
asked Discretizing regions with pointy boundaries
Jan
8
answered poltergeist onConsoleMessage initialization on Capybara
Jan
7
asked poltergeist onConsoleMessage initialization on Capybara
Jan
5
comment Supersymmetry transformations as coordinate transformations
what kind of mathematical object is the sum of a real/complex number and a grassmannian? It is obviously closed under sum, and apparently under multiplication, but probably not a full fledged field, since no inverse
Jan
5
comment How to calculate $3\otimes 3$ and $3\otimes 3\otimes 3$ in $SU(3)$?
I voted for reopen. Knowing the trend I've seen on the site, I'm pretty sure that I'll be the only one with the reopen vote indefinitely
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