So far we have developed Emergency Telemedicine System (ETS) which is a robust system using heterogeneous networks. In disaster areas, however, ETS cannot be used if the primary network channel is disabled due to damages on the network infrastructures. Thus we designed network management software for disaster communication network by combination of Mobile Ad hoc Network (MANET) and Wireless LAN (WLAN). This software maintains routes to a Backbone Gateway Node in dynamic network topologies. In this paper, we introduce the proposed disaster communication network with management software, and evaluate its performance using ETS between Medical Center and simulated disaster areas. We also present the results of network performance analysis which identifies the possibility of actual Telemedicine Service in disaster areas via MANET and mobile network (e.g. HSDPA, WiBro).

Electrode contact measurement is important in the field of bio-potential amplifiers, particularly home healthcare measurement devices, since measured signal quality depends on the contact impedance between the human body and the electrode. The incorporation of either current or voltage source to the home healthcare device can cause to increases in the number of circuit components and the risk of electrical shock if an electrical circuit malfunction occurs. In this paper, we propose a simple and relative electrode contact monitoring method by using power line interference noise source without additional measurement circuit components. The experimentation demonstrates the feasibility of the proposed measurement method for steady home healthcare devices.