A pyroelectric detector includes a pyroelectric detection element, a support member, and a support part. In the image signal processing, with the use of characteristically different low-pass filters disposed in parallel, a current-field image signal undergoes low-pass filtering process, and the outputs from the low-pass filters are mixed to produce an extended image signal including a pseudo afterglow signal. A method of reducing noise in a chain and sprocket assembly is also disclosed. The modulation format of RF burst may then be identified from the samples. Additionally, a software entity permits high bandwidth simulation of design components normally requiring cycle accurate simulation. In order to distribute the data-traffic load on a communication network, a data-traffic-monitoring system ascertains the current loading on all link lines andor network nodes, and determines distribution information for each network node.