premise: The UCT also co-operates with a project known as Aluka, which is tasked with building an "online, digital library of scholarly resources from and about the developing world, beginning in Africa. "
  The project aims not only at "virtual preservation" but also at assisting with the physical conservation of these sites, which are being eroded by the weather, time and human settlement, Ruther said.
  The Kilwa fortress in Tanzania, made of coral stone, dates back to the year 1503. It is being eroded by storms and the wind.
  Ruther explained that the accuracy of the 3D models, between one and five centimeters of the original, would assist with reconstruction should it become necessary.
   What do Project Aluka's tasks include?
hypothesis: assisting with the physical conservation