A system, method and computer program product for implementing dynamic behavior rules for malware detection. A second control loop circuit is selectably coupled through a select circuit to supply a digital control value to the multi-modulus feedback divider circuit of the first loop circuit to thereby control the oscillator output signal. In such arrangement, a large quantity of EL emission can be taken to the outside. A closure assembly can be provided to open, and close the cannula assembly to fluid flow. In other words, the device characteristics may be improved and uniformed by adjusting a position and a direction of the crystal growth. The tolerance-level display portion 12 of the head 1 displays a tolerance level on the basis of the variable voltage by turning on the tolerance-level display LEDs 12a, 12b and 12c.