Gregory A Campbell Editor

Prof. Gregory A. Campbell is Professor Emeritus at Clarkson University, NY. He formerly directed a research group at GM Research and managed polymer fabrication at Mobil Chemical Research.

Dr. Mark Spalding is a Fellow in the Materials & Parts Processing Group at The Dow Chemical Company, where he has worked since 1985. He has performed fundamental research in single-screw extrusion, developed methods to measure resin physical properties that are important to polymer processing, developed numerous techniques to debug and increase the rates of extrusion lines, and has developed new mathematical models for extrusion simulation.