UN High Commissioner for Human Rights urged Egypt on Tuesday to end its controversial “rotation” practice, which allows authorities to arbitrarily extend prison sentences beyond their maximum term.

(Nanowerk Spotlight) The controlled rotation of micro- and nanoscale objects plays a crucial role in sensing, imaging, biomedicine, and manufacturing. Micro- and nanorotors have proved effective in ...

gives formula to show if a point is inside a cylinder. It is based on finding a rotation that maps the cylinder axis onto a cartesian axis, and then calculate the distance from the axis.