Visible Random Groupings (VRG)

I was first introduced to VRG's by Laura Wheeler who told me the idea came from Peter Liljedahl a professor at Simon Fraser University in Burnaby British Columbia.

Vertical Non-Permanent Sufaces (VNPS)

• I first found out about VNPS on Laura Wheeler's Blog.  She referred her findings to Peter Liljedahl , who is responsible for bringing VNPS to the forefront.