http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Mobility Energy Gap and Dielectric Constant in SiOC film
YoungHun Yu,ChangSil Yang,ChiKyu Choi,SangChil Lee,WonKi Jung 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.5
The SiOC films used in this research were prepared by using an inductively coupled plasma chemical vapor deposition (ICPCVD) method, and the carbon concentration in the SiOC films was controlled by using mixed gases of bistrimethylsilymethane (BTMSM) and oxygen. The relations between the carbon concentration and the energy gap and between the energy gap and the dielectric constant were studied. The energy gap was calculated from the current - voltage relation. The energy gap increased with carbon concentration, but the dielectric constant decreased as the energy gap increased. The mechanism of decreasing dielectric constant with increasing energy gap is discussed in the context of the Penn Model.
테라헤르츠 발광 반도체 다이오드의 열 저항에 대한 연구
유영훈,김두철,최치규 濟州大學校 基礎科學硏究所 2001 基礎科學硏究 Vol.14 No.2
Green 함수를 이용하여 테라헤르츠 발광 다이오드 정적, 동적 액티브내의 열 흐름을 조사하였다. 전류가 공급되면 약 300㎲이후에 온도 증가가 포화되는 것을 알 수 있었다. 또한 온도분포가 공급되는 전류의 크기와 관계되며, 다이오내 액티브의 위치에 관계되는 것을 알 수 있었다. A detailed analysis of the dynamic and static heat flow in a terahertz light emitting diode is carried out by Green function. The results show that the temperature rises very quickly in initial transient, and after ~300㎲ it saturates. And the distribution of increasing temperature depends on the current density and location of active layer.
Younghun Jeong,Jihwan Park,Jin Yu,Sunyeong Lee,Jihee Ha,Yeonki Choo,Taeyoung Oh 국제물리치료연구학회 2019 Journal of International Academy of Physical Ther Vol.10 No.1
Background: There have been many studies on self-myofascial release (SMR) stretching, but there are few comparative studies on the effects of massages using a release ball, which is a type of the SMR method. Objective: To investigate the immediate effects of release ball massage and self- stretching on proprioceptive sensory, hamstring’s temperature, range of motion (ROM) muscle strength,. Design: Crossover study. Methods: Thirty women in 20’s at S University in Busan voluntarily participated in the study. Participants were random to release ball group (n=15) or selfstretching group (n=15). Both groups performed 3 sets of exercises, stretching for 30 seconds and resting for 15 seconds in each position. The proprioceptive sensory, temperature of the hamstring muscle, ROM, and strength were measured before exercise, 5 minutes after exercise, and 30 minutes after exercise. Results: Release ball group showed significant differences in muscle length and temperature over time (p<.05). The comparison between two group over time showed significant differences in muscle length, temperature, and muscle strength (p<.05). Conclusions: These results demonstrate that release ball massage and selfstretching are beneficial for improving hamstring's temperature, ROM and muscle strength.