This appears similar to the work in this research: http://researchspace.csir.co.za/dspace/bitstream/10204/7552/3/Smith_2014.pdf http://researchspace.csir.co.za/

This appears similar to the work in this research: http://researchspace.csir.co.za/dspace/bitstream/10204/7552/3/Smith_2014.pdf http://researchspace.csir.co.za/dspace/bitstream/10204/7552/... -- something called Rock Garden, but I don't think they are related.