1. Department of Mechanical and Aerospace Engineering, and Food Science Program, Division of Food Science System & Bioengineering, University of Missouri, Columbia, Missouri 65211, Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, and Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77081