User interactive methods of determining vertex correspondence between boundaries or curves on objects to be merged is provided. The elongate member 14 includes a tapered supporting surface 18, which may be provided on a tapered stress joint or flex joint 16. The optically functional nanoparticles are nanoparticles in the range of about 0. The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area 31 and the recordingreproducing area 32 respectively, are more than 0. The functionalized phthalimide derivatives are designed from the prototypes thalidomide and hydroxyurea. The compositions are particularly useful when applied to the skin after hair removal in that they additionally cool, soothe and moisturize the skin.