

Tha resulting chain of vortices is sometimes called the Von Kármán street. Albeit the turbulence is generally connected with energy dissipation, the formation of vortex lattice decreases the friction in the surface layer instead, thus making the environment a bit superfluous by the same way, like the formation of quantized vortices in Bose-Einstein condensates. Therefore the AWT logo illustrates the superfluous nature of vacuum, too. Note the possible "extraterresterial origin" of graphics, created on July 27, 2001 in Rybury/Tann Hill, England...;-)