... 10.1243/03093247JSA5 35, 55 5 -56 2, 2009. [34] W. Zhang, J. Suhr and N. Koratkar, “Carbon nanotube/polycarbonate composites as multifunctional strain sensors,” Journal of Nanoscience and Nanotechnology, ... engine and gearbox performance and provide rotor track and balance. HUMS could also be configured to monitor auxiliary power unit usage and exceedances, and include built-in test and Flight ... Issue 8, pp. 40 15- 5030, August 19 95. [ 25] J.F. Tressler, S. Alkoy, R.E. Newnham, “Piezoelectric sensors and sensor materials,” Journal of Electroceramics, Vol, 2, Issue 4, pp. 257 -272, 1998....