A semiconductor test structure includes a PFET transistor, having a source region, a drain region, a gate disposed between the source region and the drain region, a body disposed under the gate, and a body contact. The method includes generating a cycle control signal which includes ON-Time and OFF-Time, and adding a regulation energy of varying amplitudes or frequencies in the OFF-Time to provide varying modulation modes by mixing duty cycle, frequency modulation and amplitude modulation. The method also includes heating the nanoparticle ink to a first temperature between about 30\xb0 C. Additionally, the method an apparatus relates to the treatment of torticollis and other abnormalities of the neck. When an initialization operation of the step motor is started without pulley information stored in the memory unit, an output torque of the engine is restricted, and the restriction is removed after the initialization operation is finished. The following steps are then executed at least three times.