4,841 reputation
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location Cologne, Germany
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visits member for 4 years, 3 months
seen 5 hours ago

Functional programming enthusiast, audio engineer & musician. I work both on ugly number-crushing code for plasma- and geophysics at Universität zu Köln, and on beautiful Haskell projects of my own (which, however, seldom seem to reach a really usable state).


Aug
13
comment Halley's Comet as a “Free Taxi”
“fundamental misunderstanding as to how movement in space works” — what-if.xkcd.com/58.
Aug
5
awarded  Nice Answer
Jul
26
revised Breaking the sound barrier underwater
Typos
Jul
26
revised Breaking the sound barrier underwater
added 401 characters in body
Jul
26
answered Breaking the sound barrier underwater
Jul
26
revised Very strange shadow phenomenon
Re-host GIMP file on Dropbox, since Ubuntu One has been discontinued.
Jul
21
comment How can one derive the Ohm's Law?
The Drude model is definitely the best answer to this question, +1.
Jul
21
comment How can one derive the Ohm's Law?
Uh... how does the water-flow analogy imply that $U \propto I$? (That is actually valid for a purely laminar flow, but who says it makes sense to assume high viscosity for the water-flow model?)
Jul
15
comment Is Dark Matter expected to be equally distributed in our solar system?
@RobJeffries: I'd say $\pm1.5\:\%$ still qualifies as “pretty uniform”. But the prediction of that variation is really cool!
Jul
12
comment Which one to learn first: Special or general relativity?
Or to place that analogy somewhere else: it would be like making a full motorcycle driver's license without first learning to ride a bicycle.
Jul
8
comment Quantization vs. continuous energy levels
You do get a truely continuous spectrum in a gas if you make the interactions strong enough. Enough temperature & pressure... that's basically why the sun is a black-body.
Jun
29
awarded  Nice Answer
Jun
16
revised Why and how does negative velocity exist?
LaTeX math parts
Jun
16
comment Why and how does negative velocity exist?
This is IMO a better answer than the accepted one: there is no such thing as a negative vector, there's only vectors with direction that happens in some basis to have negative coefficients.
Jun
10
comment What exactly is a dimension?
@TemplateRex: to be pedantic, the guy's called Gram, not Gramm...
Jun
9
comment What exactly is a dimension?
To be pedantic, what you're talking about is linear independence rather than orthogonality.
May
15
comment Is it possible to build an air compressor with no moving parts?
@user3368561: you don't need any moving parts to obtain, convert and transport electricity.
May
9
awarded  Yearling
May
4
awarded  Nice Answer
May
3
comment What exactly implies the need of quantum mechanics for self-adjoint and not only symmetric operators?
possible duplicate of Why is quantum mechancis is not content with symmetric operators, but wants self-adjoint operators?