3,056 reputation
619
bio website numericalrecipes.wordpress.co…
location San Diego, CA
age 43
visits member for 4 years, 8 months
seen Aug 17 at 0:31

A mechanical engineer by education, I'm currently working for HP's Large Format Printing Specialty Printing Systems Advanced Platforms Group in Barcelona, Spain, San Diego, CA, dealing mostly with printing algorithms computer vision firmware.


Aug
16
comment Is two cars colliding at 50mph the same as one car colliding into a wall at 100 mph?
Yes, that's the way I see it.
Aug
15
comment Is two cars colliding at 50mph the same as one car colliding into a wall at 100 mph?
Nope. The reference frame is not tied to the car, it is an inertial reference frame that happens to be one that the first car is stationary in at the starting time. A stationary car hit by another car will not stand still, but start moving backwards at half the speed of the incoming car.
Aug
15
revised Finding optimal angle for projectile, taking into account linear (Stokes) drag
added 2 characters in body
Dec
27
awarded  Yearling
Nov
26
revised How thick does steel have to be to be able to withstand 300 bar (sphere)
added 1 character in body
Nov
26
reviewed Approve How thick does steel have to be to be able to withstand 300 bar (sphere)
Aug
7
awarded  Nice Answer
Dec
27
awarded  Yearling
Sep
3
awarded  Nice Answer
Feb
3
comment Falling through the rotating Earth
@PeterShor Thanks! I did get to the Wikipedia page on Bertrand's theorem (en.wikipedia.org/wiki/Bertrand's_theorem) about half an hour after finishing my fight above with polar coordinates...
Feb
3
answered Falling through the rotating Earth
Jan
30
revised Where can I check a solution to 3D Navier Stokes?
added 242 characters in body
Jan
30
answered Where can I check a solution to 3D Navier Stokes?
Jan
29
comment Which is the axis of rotation?
Of course in three dimensions things don't rotate around a point, but around an axis. Still there always is a well defined, instantaneously stationary line, around which the object is rotating at any given moment.
Jan
29
comment Which is the axis of rotation?
While your anlysys is correct, the canonical answer to "which point the body is rotating about" would be that it is rotating around the instant centre of rotation: en.wikipedia.org/wiki/Instant_centre_of_rotation
Jan
27
comment Finding optimal angle for projectile, taking into account linear (Stokes) drag
@m0nhawk Not really. I just chose the obvious units for velocity and time, and then $\lambda$ forms on its own. But you could get it that way too.
Jan
27
revised Finding optimal angle for projectile, taking into account linear (Stokes) drag
added 330 characters in body
Jan
26
answered Finding optimal angle for projectile, taking into account linear (Stokes) drag
Jan
25
reviewed Looks OK How feasible is Laser Plasma Acceleration for the post-LHC world?
Jan
25
reviewed Looks OK Spectral luminous efficiency as a function of wavelength