A pump for circulating a coolant has a housing thereof in direct thermal connection with an electronic component. For data storage devices divided into sectors, the present invention performs nondestructive write testing by writing data to the sectors, reading data written to the sectors, and comparing the data written to the data read to detect errors. The second lens includes a convex surface facing the first lens, and a flat surface opposing the convex surface of the second lens. The configuration may comprise periodic adjustments of the value of the cellular communication parameter. The plant exhibits high resistance to rain, heat, drought and diseases such as powdery mildew. The voltage controller keeps a first node and a second node of a signal path to be around a common DC voltage, wherein the first node is located between an output terminal of the LNA and an input terminal of the passive mixer, and the second node is located between an output terminal of the passive mixer and an output terminal of the TIA.