Fulfillment of web-service requests may be facilitated by intelligently load balancing the web-service requests between servers or server clusters configured to perform the requested web-service. The first ferromagnetic layer is the stabilization layer and the second ferromagnetic layer is the main recording layer. The image descriptor is appended to the corresponding inverted list with a compact coding using a product quantization encoding scheme. The processor is in operable communication with the first and second sensors and is configured to receive the first and second signals and measure a time period between the receiving of the first and second signals. A DC line cable 23 and a control line cable 25 that connect a battery 21 and an electric power converter 22 are disposed on a top surface of a center tunnel 37 of a vehicle 1, and a metallic wiring protective cover 35 has a cooling passage 30 disposed therein and is disposed on a floor panel 36 so as to cover the DC line cable 23 and the control line cable 25.