| Kiefersfelden, | Skiing in Austria, | US National Parks, | Morocco. |
| Maximize volume of convex hull, | Maximize minimum distance (Tammes' problem) |
| Packing spheres in a cube, | Packing spheres in a sphere (needs Java). | Liang Yu's results (Aug 2011) |
| Self-trapping random walks, | Zigzag paths, | Lacing a shoe. |
| Professional activities: | Aero engine usage monitoring, | RTO AVT, | Lectures. |