Two three-meter high structures lie in the backyard of the Agency for the Assessment and Application of Technology’s (BPPT) Geostech Building at the Serpong Science Research Center, Banten. The structures are rusty and smothered by shrubs and ivy. Ravaged by time and weather, the equipment’s yellow and orange casings   are faded. “These are the remnants of first- and second-generation tsunami buoys,” said Iyan Tu