Darren Maxwell began obsessively collecting Batman memorabilia in the late 1980s to be a part of geek culture. Decades later, he wants to let go of his obsession, but is unable to.
discovered this pattern on a 14th century madrassa.在一所14世纪的伊斯兰学校中 现了这个图案。 And after some analysis, concluded that this was, in fact, Penrose tiling 500 years before ...
Incremental rotation sensors are used wherever displacement, positions or speeds have to be measured accurately. They are therefore important interfaces between the mechanical and electronic parts of ...