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Each communication station, at least, periodically transmitsreceives a beacon at regular intervals and manages the transmissionreception using a neighboring-station list, thereby managing the network of the communications station in a distributed manner. More particularly, this invention relates to nucleic acid-based optical sensors, sensor arrays, sensing systems and sensing methods for intelligent sensing and detection of unknown materials by way of real-time feedback and control of sampling conditions. The biodegradable polyester mixture further comprises 10 to 25 wt %, based on the total weight, of calcium carbonate; and 3 to 15 wt %, based on the total weight, of talc.