There are many ways to reduce or eliminate notching, and this is one of the most innovative! The idea is to build two walls - studs sideways. Then the strawbales go into the frame. Tying the inner and outer studs together will increase strength of the whole wall. The second innovation here is the plaster...formwork is used against the studs, and the plaster is essentially poured between the forms and the straw...nice and thick for excellent thermal mass and excellent bond to the straw.