A memory module comprises a stab resistor between a pin and one end of a bus. In the image searching method and apparatus, a dominant image element is extracted using a fractal image compression method, so that the image is partially restored, to thereby effectively search for the video image. The microcontroller may receive and processes the signal from the sensor module to identify a detected event and selectively activates at least one of the output module and the sensor module based on the detected event. In an alternative embodiment the transparent casing comprises at least one transparent layer, wherein the refractive index of the transparent layer is higher at an inner portion than an outer portion thereof. In communicating with the target system, the communication board may emulate a particular interface that is supported by the target port. A detection management circuit issues countermeasures to the anomaly based on programmed responses.