1,2,4-Triazine-3,5-dione-6-carboxamides of the general formula are described as herbicides. A plural number of unit wiring layers, each formed by an insulating layer, having a passive device unit in its portion, and by a pattern wiring, are layered on a dummy substrate, and are released from the dummy substrate to form the high frequency circuit block unit, which is mounted on a motherboard. The health-monitoring system and method include a front-end system coupled to the sensory system and a front-end to back-end communication protocol coupled to the front-end system. For use, the bracket is placed over the horn, and the feet are urged against the mounting plate of the pintle of the hook tow point or another fixed surface.