A touch-and-close fastener part includes a functional layer forming a backing surface and formed from a thread system with at least two line elements forming meshes and connected to one another. The first and second optical blocks have different respective magnifications. To grow silicon nanowires for example, a silicon substrate covered with gallium droplets is exposed to a microwave plasma containing atomic hydrogen. The results of genotyping the target nucleic acid using the optimal probe pairs for each mutation site are statistically robust to errors. Some bus agents are designated as normal-priority agents, while other bus agents are designated as high-priority bus agents.