The present invention provides an automatic hair washer which can perform hair washing in a most suitable situation for parts washed by washing nozzles which are provided on inner walls of a cistern, purposes and configurations of the washing nozzles. The method further includes measuring a magnitude of the lateral force over time, and determining a toughness of interfacial adhesion between the coating and the major surface based on changes in magnitude of the lateral force as the position of the probe moves from the starting point to ending point. The coating solution is applied to the skin piercing elements using known coating techniques and then dried. A method and corresponding apparatus for managing data center equipment may use the phase based available power capacity calculations to determine the optimal placement of new data center equipment within a data center configuration. The source of one transistor is connected to a guard ring, of the same conductivity type as the substrate within which the channel region of the other transistors is disposed. Each of the side assemblies has a block ring, a bearing plate, a sealing plate and a connecting tube.