The invention provides compositions and methods for treating or preventing infestation of a site with a spider. The bond elements can consist of stress receptor elements, stress transfer and dissipation elements, and stress termination elements. As a result, if the character string includes description corresponding to the format for camera control, the camera control apparatus 1001 controls the camera in accordance with the description to perform image sensing, and transfers the obtained video image as the content of an image file requested by the external device as the file-transfer request originator. As such, the signal-to-pulse conversion module is taking an N-bit signal and converting it into an M-bit pulse signal.