| [ jobOpportunity ] in KIDS 글 쓴 이(By): juyoon () 날 짜 (Date): 1997년10월31일(금) 01시52분48초 ROK 제 목(Title): Postdoctoral position at NASA To Ph.Ds in physics, electronics, material or other area related to this topic Dr. Sang H. Choi, a scientist working at NASA Langley Research Center is finding a candidate for post-doctoral position to help him. He wants agressive, hardworking and enthusastic person. The candidate doesn't need to have specific knowledge about his area. This is his mail. ========================================== The program we have is related to NASA's next generation space telescope which will be deployed around 2010. Our role is to develop actuators that are remotely controlled and activated for the surface correction (max 30 nm level) of mosaically fragmented adapted optical reflectors. New concept we proposed is the microwave-driven smart material actuators. Microwave that is incident on rectenna patches on smart material actuators is converted into DC power (with high voltage and low current). And this DC power provides threshold voltage that is needed for activating and controlling actuators. Our job is to provide the science and engineering community the followings: (1) Demonstration of the concept (proof-of-principle), (2) Survey and development of new candidate smart materials, (3) Development of a single patch based actuator, (4) Development of an array of multi-rectenna patches for power distribution, and (5) Development of control-logic imbedded smart material actuators for power utilization. As you see, the overall concept is new and is under patent application for invention. The rectenna concept is already developed and pretty much well known. However, it still needs to be tailored to fit this application. Smart materials, such as piezoelectric materials, are also pretty much well known but the properties required for this application are the low threshold voltage susceptability and low temperature effects. New breed of piezoelectric material might be searched or developed. However, this area of research is not heavily emphasized, especially for development at this situation since the proof of concept has to be preceded. We have another group who is heavily involved in materials development and applications. They might be very helpful to assist our effort. The area we are talking about is new and gives a great deal of challenge and interests. I believe the challenges ahead of us are the very good subject for post-doctoral work. Please note that, as you see, the nature of program requires a total dedication of an individual for demonstrating the proposed technology. Hence, I would like to have any one who is interested in to work full time here at NASA Langley Research Center without any interruption. On top of the job requirement, I have some concern about the funding schedule for supporting post-doctoral researcher since the fund to this year(to 1998/9) is completely decided(unchangeable). So, I want someone who can get the fund from other source(eg. Korea Science Foundation) for 1 year. I want him/her to work at least for 2 years or more, too. Next year funding(from 1998/10) may be supported by NASA depending on outcome of this year. Thank you very much for your interest. Sang H. Choi (s.h.choi@larc.nasa.gov) (757) 864-1408 ========================================================================== Dr. Choi said it's very urgent. If you have interest, please mail or call him now. @He is a Korean and 52 years old. @He is highly experienced scientist. |