Techniques for intelligently biasing video thumbnail selection to popular segments of the video file are provided. The circuit utilizes a thermistor to monitor the temperature rise of the electrical trace supplying current to the defrost heater to allow the controller to calculate an amount of power delivered thereby. Also included is a write circuit, having first and second switches coupled to the capacitor, and a read circuit also coupled to the capacitor. The normal column mode frequency represents a range of vibrational modes of the hand wheel based on a hands off wheel condition. Accordingly, the kimchi refrigerator reduces the temperature difference between the areas of different heights within the storage compartment, and creates a uniform temperature distribution in the storage compartment. The contact roll helps spread the adhesive more quickly and uniformly.