The present invention is to provide a silver-based inorganic antimicrobial agent that has excellent heat resistance and chemical resistance, that gives little resin coloration, and that has excellent processability. The compounds are useful for the treatment andor prophylaxis of diseases which are associated with the modulation of CB1 receptors. A series of sparks is produced across the spark gap and the spark voltage is sensed and attenuated to produce a voltage signal. Digital graffiti corresponding to the gestures are then superimposed onto a digital canvas. , for 3D sequences, stock tickers, interactive advertising and other uses.