An oscillator circuit includes a field effect transistor and a resonant circuit having a first terminal connected to the field effect transistor. The invention further provides, in a computer system, a method of screening for mutations of human CNG2B genes as well as a method for identifying a three-dimensional structure of human CNG2B polypeptides. A motherboard and a hard disk driver backplane coupled to multiple hard disk drivers are provided, and a working voltage is provided for the hard disk driver backplane, wherein a power-up normal signal is generated when the hard disk driver backplane is powered up normally, and the motherboard includes a booting control circuit and a controller. The WDM light is amplified in a wavelength band divided into a plurality of individual wavelength bands. The inputs to the functional dependency network are parametrically specified by media data types to construct a template that can be used to create adaptive media productions.