1 to 6 of 6 Results
Mar 18, 2013
Paulsen, G.; Zacny, K.; Melrowicz, B.; Craft, J.; Bar-Cohen, Y.; Beegle, L.; Sherrit, S.; Badescu, M.; Corsetti, F.; Ibarra, Y., 2013, "Wireline deep drill for the exploration of ivy bodies", https://hdl.handle.net/2014/44135, 44th Lunar and Planetary Science Conference (LPSC 2013), Woodlands, Texas, March, 18–22, 2013, JPL Open Repository
One of the most pressing current questions in space science is whether life has ever arisen anywhere else in the universe. Water is a critical prerequisite for all life-as-we-know-it, thus the possible exploration targets for extraterrestrial life are bodies that have or had copi... |
Feb 7, 2009
Badescu, Mircea; Sherrit, S.; Bao, X.; Aldrich, J.; Bar-Cohen, Y.; Jones, C., 2009, "Extended life PZT stack test fixture", https://hdl.handle.net/2014/41632, Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, San Diego, CA, 2008, JPL Open Repository
Piezoelectric stacks are being sought to be used as actuators for precision positioning and deployment of mechanisms in future planetary missions. Beside the requirement for very high operation reliability, these actuators are required for operation at space environments that are... |
Mar 9, 2008
Sherrit, S.; Bao, X.; Bar-Cohen, Y., 2008, "Solid Micro Horn Array (SMIHA) for acoustic matching", https://hdl.handle.net/2014/44816, 2008 SPIE Conference on Smart Structures and Materials, San Diego, California, March 9-13, 2008, JPL Open Repository
Transduction of electrical signals to mechanical signals and vice-versa in piezoelectric materials is controlled by the material coupling coefficient. In general in a loss-less material the ratio of energy conversion per cycle is proportional to the square of the coupling coeffic... |
Mar 3, 2008
Sherrit, S.; Bao, X.; Badescu, M.; Aldrich, J.; Bar-Cohen, Y.; Biederman, W., 2008, "1KW power transmission using Wireless Acoustic-Electric Feed-through (WAEF)", https://hdl.handle.net/2014/41735, ASCE American Society of Civil Engineers, Earth and Space 2008, Long Beach, California, March 03, 2008., JPL Open Repository
A variety of space applications require the delivery of power into sealed structures. Since the structural integrity can be degraded by holes for cabling we present an alternative method of delivering power and information using stress waves to the internal space of a sealed stru... |
Aug 24, 2004
Sherrit, Stewart; Badescu, M.; Bao, X.; Bar-Cohen, Y.; Chang, Z., 2004, "Novel horn designs for power ultrasonics", https://hdl.handle.net/2014/41503, IEEE Symposium on Ultrasounics, Montreal, Canada, August 24-27, 2004., JPL Open Repository
Ultrasonic horns are used in a variety of industrial and medical applications. At JPL a rock-sampling tool based on an ultrasonic horn was developed to drill, abrade and core rock samples including hard basalts. This device is an impact device, which uses ultrasonic vjbratlons th... |
Mar 1, 2004
Bar-Cohen, Y.; Sherrit, S.; Chang, Z.; Wessel, L.; Bao, X.; Doran, P. T.; Fritsen, C. H.; Kenig, F.; McKay, C. P.; Murray, A.; Peterson, T., 2004, "Subsurface ice and brine sampling using an ultrasonic/sonic gopher for life detection and characterization in the McMurdo Dry Valleys", https://hdl.handle.net/2014/38140, SPIE Smart Structures Symposium, San Diego, CA, March 15, 2004, JPL Open Repository
There is growing evidence for ice and fluids near the surface of Mars with potential discharge of brines, which may preserve a record of past life on the planet. Proven techniques to sample Mars subsurface will be critical for future NASA astrobiology missions that will search fo... |
