1 to 10 of 261 Results
Apr 19, 2021
Bar-Cohen, Y.; Lee, H. J.; Badescu, M.; Sherrit, S.; Bao, X.; Metz, B. C; Lih, S-S.; Vance, S.; Panning, M. P; Hand, K. P, 2021, "Elastic Wave Analyzer for Icy Sub-Surfaces (EWAIS) In the Solar System", https://hdl.handle.net/2014/54597, Earth and Space Conference, Pasadena, California, April 19-23, 2021, JPL Open Repository
No abstract provided |
Apr 21, 2020
Bar-Cohen, Y.; Lee, H. J.; Badescu, M.; Sherrit, S.; Bao, X.; Metz, B. C; Lih, S-S.; Vance, S.; Panning, M. P; Hand, K. P, 2020, "Elastic wave analyzer for icy sub-surfaces (EWAIS) in the solar system", https://hdl.handle.net/2014/52291, Earth & Space 2020 Conference , Seattle, Washington, April 20-23, 2020, JPL Open Repository
The sub-surface structures of water-bearing icy worlds (e.g., Europa, Enceladus, and Titan) and the structures of icy regions on Mars contain critical information about their origin and evolution. These bodies have been identified as high-priority targets in the NRC Planetary Sci... |
Jun 5, 2016
Bar-Cohen, Y.; Badescu, M.; Lee, H.J.; Sherrit, S.; Bao, X.; Freeman, D.; Zacny, K.; Paulsen, G.L.; Beegle, L., 2016, "Deep drilling using the biologically inspired Auto-Gopher", https://hdl.handle.net/2014/46636, CIMTEC 2016 - 7th Forum on New Materials, Perugia, Italy, June 5-9, 2016, JPL Open Repository
No abstract provided |
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... |
Oct 1, 2007
Bar-Cohen, Y., 2007, "Artificial muscles based on electroactive polymers as an enabling tool in biomimetics", https://hdl.handle.net/2014/40871, Proceedings of the Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Science Volume 221, Issue 10, 1149-1156 (2007) doi 10.1243/09544062JMES510, JPL Open Repository
Evolution has resolved many of nature's challenges leading to working and lasting solutions that employ principles of physics, chemistry, mechanical engineering, materials science, and many other fields of science and engineering. Nature's inventions have always inspired human ac... |
Aug 30, 2004
Bar-Cohen, Y., 2004, "Biologically inspired robots as artificial inspectors - science fiction engineering reality", https://hdl.handle.net/2014/8031, ['16th World Conference on NDT - Keynote Presentation', 'Montial, Canada'], JPL Open Repository
No abstract provided |
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... |
