An optical time domain reflectometry system is used to determine a power response from a device under test -DUT-. A topic for the article may be chosen based on the article and an original headline. For each object, the respective object variables are stored at a memory location and the pointer to a respective method table is stored at a memory location indexed off of the location of the object variables. During and after the process of inserting the knives into the knife stand, the magnets will keep the cutting edges of the knives away from the bottom inner sides of the inserting slits, thereby effectively preventing the edges from becoming blunt, which is caused by their rubbing against the inserting slits.