The present invention provides a twist prevention socket and an electrical device having the socket. The invention also provides a computer program product for use in the detection of changes in rates of water diffusion in a tissue using magnetic resonance imaging comprising a computer useable medium comprising a computer readable program code embodied therein, wherein the computer program product is capable of storing and analyzing data input from a MRI device. The sensor structure occupies a very small area at the surface of the die increasing the area for ICs need to be integrated on the same chip. Further, methods for stimulating or blocking taste perception in a mammal are also disclosed. In addition, a method of monitoring a device connected to a powerline is provided.