But this return may involve new conceptual systems and new symbols: new modes of analysis. (religion-online.org)
The new conceptual system would be designed to give air traffic controllers the tools necessary to optimize the flow of air travel over an entire country or region. (treehugger.com)
Over the course of her 40 - year career, Jennifer Bartlett (born 1941) has tirelessly explored painting's expressive possibilities through a series of rigorous conceptual systems. (locksgallery.com)