Michael Marker has completed the work on the logo. Many thanks! Here are several steps on the way to the final logo.
One of the first versions form 2007-09-16:
A day later, this trial was considered:
We have tried to model a 3D structure of a spiral using Matlab:
Two weeks later (at the end of September 2007) the logo was similar to the final version:
Here several trials for the color choice of the final version: