The invention relates to a PEM fuel cell which has a new type of edge structure, in which a reservoir of water is formed in a minute gap between membrane and edge seal, which considerably improves the utilization time of a polymer electrolyte membrane, in particular with dry process gases. The navigation system comprises: a healthcare information system configured to have access to at least patient information, healthcare resource information and healthcare facility information; and an identification device provided to a patient in the healthcare facility, configured to communicate at least the current location of the patient to the hospital information system. An alternative method monitors the health characteristics of the member for multiple time intervals and calculates the changes in the health characteristics of the member stored in the database between the two time intervals. A buffer region of the first polarity type is formed in the HV well between and in self-alignment with inner edges of the gates. The media display application monitors the geolocation and position of the mobile device and determines whether the geolocation and position of the mobile device meet the access conditions of the selected media item.