A titanium oxide showing sufficiently high photocatalytic activities by irradiation of visible light is provided. Exemplary polymers for this purpose include arginine homopolymers 7 to 15 subunits in length. An arrhythmia may be detected using electrocardiogram signals, and verified using the non-electrophysiologic signals. The receiverprocessor is provided with programmable memory which holds coordinates of the space where the receiverprocessor will be moveable which is behind the line-of-sight barrier. The main slot defines a feed line region and ground plane regions.