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11 to 20 of 27 Results
Thermal analysis of brazing seal and sterilizing technique to break contamination chain for Mars sample return
Mar 8, 2015
Bao, Xiaoqi; Badescu, Mircea; Bar-Cohen, Yoseph, 2015, "Thermal analysis of brazing seal and sterilizing technique to break contamination chain for Mars sample return", https://hdl.handle.net/2014/45712, SPIE Smart Structures, San Diego, California, March 8-12, 2015, JPL Open Repository
The results show that the sealing and sterilization process can be controlled such that the samples' temperature is maintained below the potentially required level.
Actuators using piezoelectric stacks and displacement enhancers
Mar 8, 2015
Bar-Cohen, Yoseph; Sherrit, Stewart; Bao, Xiaoqi; Badescu, Mircea; Lee, Hyeong Jae; Walkenmeyer, Phillip; Lih, Shyh-Shiuh, 2015, "Actuators using piezoelectric stacks and displacement enhancers", https://hdl.handle.net/2014/45715, SPIE Smart Structures, San Diego, California, March 8-12, 2015, JPL Open Repository
The developed actuators and performance will be described and discussed in this paper.
Signal processing for determining water height in steam pipes with dynamic surface conditions
Mar 8, 2015
Lih, Shyh-Shiuh; Lee, Hyeong Jae; Bar-Cohen, Yoseph, 2015, "Signal processing for determining water height in steam pipes with dynamic surface conditions", https://hdl.handle.net/2014/45716, SPIE Smart Structures, San Diego, California, March 8-12, 2015, JPL Open Repository
An enhanced signal processing method based on the filtered Hilbert envelope of the auto-correlation function of the wave signal has been developed to monitor the height of condensed water through the steel wall of steam pipes with dynamic surface conditions.
Non-destructive testing for corrosion detection and high-temperature applications
Jul 25, 2012
Bar-Cohen, Yoseph; Sherrit, Stewart; Badescu, Mircea, 2012, "Non-destructive testing for corrosion detection and high-temperature applications", https://hdl.handle.net/2014/42438, Presentation to the Fellows of Chevron, Pasadena, California, July 25, 2012., JPL Open Repository
No abstract provided
Piezoelectric actuated drills developed at JPL and the Percussive Augmenter of Rotary Drills (PARoD)
Jun 28, 2012
Bar-Cohen, Yoseph; Sherrit, Stewart; Badescu, Mircea; Bao, Xiaoqi; Chang, Zensheu, 2012, "Piezoelectric actuated drills developed at JPL and the Percussive Augmenter of Rotary Drills (PARoD)", https://hdl.handle.net/2014/42442, Presentation to Schlumberger and Placidus, Pasadena, California, June 28, 2012, JPL Open Repository
No abstract provided
Biomimetic sensors and actuators
Apr 16, 2012
Bar-Cohen, Yoseph, 2012, "Biomimetic sensors and actuators", https://hdl.handle.net/2014/42449, 41st Annual Symposium of the Ultrasonic Industry Association, JPL Open Repository
No abstract provided
Humanlike robots – the upcoming revolution in robotics
Aug 2, 2009
Bar-Cohen, Yoseph, 2009, "Humanlike robots – the upcoming revolution in robotics", https://hdl.handle.net/2014/44616, SPIE Nanoscience and Engineering Symposium, San Diego, California, August 2-3, 2009, JPL Open Repository
Humans have always sought to imitate the human appearance, functions and intelligence. Human-like robots, which for many years have been a science fiction, are increasingly becoming an engineering reality resulting from the many advances in biologically inspired technologies. The...
High temperature piezoelectric drill
Mar 8, 2009
Bao, Xiaoqi; Scott, James; Boudreau, Kate; Bar-Cohen, Yoseph; Sherrit, Stewart; Badescu, Mircea, 2009, "High temperature piezoelectric drill", https://hdl.handle.net/2014/44652, 2009 SPIE Conference on Smart Structures and Materials, San Diego, California, March 8-12, 2009, JPL Open Repository
The current NASA Decadal mission planning effort has identified Venus as a significant scientific target for a surface in-situ sampling/analyzing mission. The Venus environment represents several extremes including high temperature (460°C), high pressure (~9 MPa), and potentially...
Transport powder and liquid samples by surface acoustic waves
Mar 8, 2009
Bao, Xiaoqi; Bar-Cohen, Yoseph; Sherrit, Stewart; Badescu, Mircea; Louyeh, Sahar, 2009, "Transport powder and liquid samples by surface acoustic waves", https://hdl.handle.net/2014/44651, 2009 SPIE Conference on Smart Structures and Materials, San Diego, California, March 8-12, 2009, JPL Open Repository
Sample transport is an important requirement for In-situ analysis of samples in NASA planetary exploration missions. Tests have shown that powders or liquid drops on a surface can be transported by surface acoustic waves (SAW) that are generated on the surface using interdigital...
Electroactive Polymer (EAP) actuators for future humanlike robots
Mar 8, 2009
Bar-Cohen, Yoseph, 2009, "Electroactive Polymer (EAP) actuators for future humanlike robots", https://hdl.handle.net/2014/44618, 2009 SPIE Conference on Smart Structures and Materials, San Diego, California, March 8-12, 2009, JPL Open Repository
Human-like robots are increasingly becoming an engineering reality thanks to recent technology advances. These robots, which are inspired greatly by science fiction, were originated from the desire to reproduce the human appearance,functions and intelligence and they may become o...
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