Stand alone topsheet article that can be engaged over an absorbent article to provide a fresh interface between the user and the absorbent article. The selected orbits are known to the signal detector a priori. Such processes provide improved reacted masses which are more readily processed to recover the products in pure, heat-stable form. A power source is connected in an electrical circuit with a light source and a switch. The inlet and outlet axes are located in two substantially parallel separate planes. Such transformations may be implemented in hardware in an efficient manner.