resonance test' and 'pulse echo overlap.' In sonic resonance test, sonic wave or impulse are applied to the specimen for finding the resonance frequency of the sample. In other words, pulse echo overlap method uses an echo that is generated by the wave in which penetrates the sample.
2-1-1. Measurement of Young's modulus using sonic resonance
The principal idea behind the sonic resonance t
It is based on the principle of resonant magnetic induction.
Its coil generates a magnetic field at a frequency that will resonate with a second coil in a device.
Ⅰ. Rapid and widespread growth of mobile technology in the 21st century
ex) Dr pepper and Seven Up inc
Ⅱ. Companies worldwide are going mobile
ex) United Parcel Service, FedEx
Abstract- This paper presents an X-band voltagecontrolled
hairpin resonator oscillator using GaAs
MESFET varactor. To get wide tuning range, the
hairpin resonator is combined with the MESFET
varactor. It is incorporated into the series feedback
oscillator. The measurement of the oscillator
showed the frequency tuning range of 11.15 MHz
with the output power flatness less than 0.10 dB at
t
Nuclear Magnetic Resonance는 물리나 화학분야에서 분자의 구조를 알아냄으로서 spectroscopic analysys를 하는 방법으로 이용 되어 왔다. 이것이 의학적 진단에 이용될때는 현재 진단된 signal과 그 기원을 알아내기 위하여 sectional image를 재구성하기 위해서는 공간적 정보가 필요하게 된다.
NMR이 개발된 것은 최근
개인 정보 & 성향 에 관한 설문입니다
1.귀하의 성별은? ① 남 ② 여
2 귀하의 나이는?
① 10대 ② 20~24세 ③ 25~29세 ④ 30~34세 ⑤ 35~39세 ⑥ 40세 이상
3 귀하의 직업은?
① 중, 고등학생 ② 대학(원)생 ③ 직장인 ④ 주부 ⑤ 기타
4. 귀하의 한달 평균 용돈은 얼마입니까?
① 10~20만원미만 ② 20~30만