In a nonvolatile memory, hybrid blocks are initially written with only lower page data. The central group participates in beam forming from Fn to Ff, the next outer group in beam forming from Fn1>Fn to Ff, and the kth outer group in beam forming from Fnk>Fn,k-1 to Ff. Also, because this radioisotope nanostructure is nano-sized spherical particles and has no reactive group, it can be easily dispersed in a fluid, and this nanostructure is physically and chemically stable and thus can be utilized as a radioisotope tracer in the fields of refineries, chemistry, cement, agriculture, water resources, marine, etc. The console may store presets associated with focus, and those presets can be changed from the remote. In one embodiment the shelter apparatus includes a platform for supporting a user, and further includes a floor and wheels supporting the floor. A force-displacement curve is generated from the stressed specimen.