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Professor John Moosbrugger Appointed Associate Dean of Engineering at Clarkson University

Professor John Moosbrugger
(Associate Dean of Engineering)

Dr. John C. Moosbrugger, Professor of Mechanical and Aeronautical Engineering at Clarkson University, has been appointed Associate Dean for Academic Programs of the University's Wallace H. Coulter School of Engineering. He joined the Clarkson faculty in 1989 and has taught courses in mechanism kinematics and dynamics, machine design, mechanics of materials, dynamical systems, vibrations, robotics, plasticity and continuum mechanics. Moosbrugger served as department chair from 2001-2005 and as Associate Director of the University Honors Program since 2007.

Professor Moosbrugger received the Alcoa Young Faculty Award in 1990, the American Society for Engineering Education-Dow Outstanding Young Faculty Award in 1992, was inducted into the Georgia Tech Council of Outstanding Young Engineering Alumni in 1996, received the Society of Automotive Engineers' Ralph R. Teeter Education Award in 1998, and was a co-recipient of the Boeing Outstanding Educator Award in 2001.

In the summer of 1990 he worked at the Oak Ridge National Laboratories with the support of an Oak Ridge Associated Universities Fellowship. Professor Moosbrugger received his B.S. degree in materials science and engineering from Wright State University and his M.S. and Ph.D. in mechanical engineering from the Georgia Institute of Technology. He has pursued research interests in the plasticity and viscoplasticity of metals and semiconductor materials and has published over 60 articles in refereed journals, books, and conference proceedings. His work has been supported by the Engineering Foundation (U.S. Air Force AFOSR Research Initiation Grant), DuPont Corporation, Northrup-Grumman Corporation, SUNY Research Foundation, the Department of Energy, the Army Research Office and the National Science Foundation.

Moosbrugger served as Associate Technical Editor for the ASME Journal of Mechanical Design from 2001-2004 and as guest editor for the International Journal of Plasticity. In addition, he is a member of the American Society of Mechanical Engineers, the American Academy of Mechanics, the Society of Automotive Engineers, and the American Society for Engineering Education.

A Novel Technique to Measure the Work-of-Adhesion for Individual Toner Microspheres

CAMP Professor Cetin Cetinkaya, Co-Director of the Nanomechanics/Nanomaterials Laboratory, describes a novel method for measuring the work-of-adhesion between a toner microsphere and a substrate. The new technique is based on rolling moment resistance. It provides experimental evidence for the existence of rolling resistance moment and data on the critical rolling distance prior to detachment. Previously it has been argued that the critical rolling distance should be related to the lattice size and/or the molecular length of the particle and surface materials. The current new approach can be employed to measure the work of adhesion between a spherical toner particle and a flat surface, without the prior knowledge of the particle diameter since the rolling moment stiffness is directly proportional to the work of adhesion with no dependency on the diameter of the particle. Experimental results were compared with the available data and good agreement was found between the theoretical predictions and the experimental values. Presently, the Nanomechanics/Nanomaterials Laboratory is applying the technique to the characterization of EA toner and pharmaceutical excipient particles. For more information, see the following reference (W. Ding, A. Howard, M.D.M. Peri, and C. Cetinkaya, “Rolling Resistance Moment of Microspheres on Surfaces: Contact Measurements,” Philosophical Magazine , Vol. 87, Issue 36, pp. 5685 – 5696, 2007).

Figure 3. Rolling is initiated if the lateral force F is increased above a certain level. Provided are an overall SEM view of the toner particles tested and AFM cantilever beams.

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