Last December I was fortunate to be in Adelaide and encountered an intriguing installation by the Japanese artist Chiharu Shiota.  The artist, her two assistants and the Art Gallery of South Australia’s own installation team worked around the clock, seven days a week, for three weeks to create the specially commissioned work, Absence Embodied.   “An installation is about the moment,’’ said Shiota, 46, “It has the power to evoke the meaning of life and death for the audience.”