in the gallery conserve the tide level of the water and their movement was based on an electronic device that predicts second to second the tide in adjustment with the date, the present hour and the table of tides previously published by the port of Singapore. The rhythm of the buoys swaying in the installation corresponds to the tide oscillation, that is extremely slow, almost imperceptible, and only noticeable if we observed the piece at different moments of the day. Final Abierto (Open Ending, 2009) 12 inches vinyl disc redesigned like chronometer needles were the hands of five particular clocks that indicated the days, hours, minutes, seconds and hundredth of second. The needles were of the end of the disc or dead wax. The central label was only a reference of the disc used. The speed of the hand of the clock produces subtle sound combinations every hundredth of second, second, minute, hourly or once a day. That way, the installation becomes an endless sound-time accumulator. The installation becomes an endless sound-time accumulator. 23.90mts (2009) 23.90 meters is the calculated length of a short wave antenna to synchronize 5960 khz, the NHK International Japanese Radio frequency for Central America and part of the North between 9:00 and 10:00 pm. The 23.90 meters of the aluminium installation functioned as a short wave antenna, which rescue and return the japanese language to a trolleybus through the NHK International Japanese Radio for Central America. The sound installation produces a simultaneous bond with the japanese language and activating the exhibition place's memory in a trolleybus donated by Japan to Mexico City in the year 2000. To build the antenna-installation, parts of three aluminium tubular chairs were taken apart and reused. With the new chairs geometry, a line of 23.90 meters was obtained. When two short wave radios were connected, the radio station broadcast from Tokyo could be received. Signal Mirrors (Espejos de señal, 2008) Construction of live landscape to blur a city's mountainous topography: in a mountainous city several people kilometers away from each other and in the same topographic height produced a horizontal gesture making sparkles with signal mirrors. The collaboration was requested tof inhabitants whose houses were marked under an extensive imaginary horizontal trace, that the natural landscape of the city does not have. During the action, a group of art students made signals (sparkles), from houses located in the horizontal outline