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Low-Dye 테이핑 적용이 아치회복운동을 시행한 편평족의 장딴지근력에 미치는 효과
박재규,김광록,김건우,김민지,노수빈,성누가,김진아,Park, Jae-Gyu,Kim, Gwang-Rok,Kim, Gun-Woo,Kim, Min-Ji,No, Su-Bin,Sung, Nu-Ga,Kim, Jin-A 한국임상보건과학회 2016 한국임상보건과학회지 Vol.4 No.3
Purpose. The purpose of this study was to progress the effect of gastrocnemius strength when groups are applicated on low-dye taping group and without taping group of flatfoot with arch-recovery exercise. Methods. Subjects were measured navicular drop test to confirm of 16 university student in J city, low-dye taping group and without taping group were applicated both with arch-recovery exercise, three times per a week for four weeks. The power track were measured four weeks, total 3 times. Comparative analysis of the control group and experimental group were investigated of gastrocnemius strength. Results. The results, we found that after of arch-recovery exercise were significantly increased than before of arch-recovery exercise in each foot. And application of low-dye taping(experimental group) in flatfoot with arch-recovery exercise were significantly increased than control group. Conclusions. In conclusion, the arch-recovery exercise application were effective to low-dye taping significantly increase the gastrocnemius strength of flatfoot.
박재규,한상필,김성일,송민협,김기수,Park, J.,Han, S.P.,Kim, S.,Song, M.,Kim, K.S. 한국전자통신연구원 2021 전자통신동향분석 Vol.36 No.3
Recently, LNOI photonics technology has attracted attention as a photonics platform capable of integrating ultra-high-speed, low power consumption, and high nonlinearity optical devices, as it is possible to manufacture LiNbO<sub>3</sub> optical waveguides with ultra-low optical loss and a radius of curvature of several tens of micrometers. Here, we will briefly compare various photonics platforms, such as Si, InP, SiN, and LNOI, describe the current research trends of LNOI photonics, and discuss the direction of photonics technology at the conclusion.
인력물자취급작업시 작업 대상물의 위치가 신체자세동요에 미치는 영향
박재규,박성하,Park, Jae-Gyu,Park, Seong-Ha 대한인간공학회 2004 大韓人間工學會誌 Vol.23 No.4
The objective of this study is to identify the effects of material position and physical fatigue on postural stability. Ten male subjects participated in this study. After bicycling exercises, their centers of pressure (COPs) were measured under four material handling positions and four excercise levels. The measured COPs were then utilized to calculate postural sway length in each experimental condition. Subjects' postural stability was quantified using the sway length. Results showed that the effect of different material handling position was significant on the postural sway length in both the posterior-anterior axis and the medio-lateral axis. Results also showed that the postural sway length was increased as physical fatigue accumulated, significantly in subject's posterior-anterior axis. The results imply that bearing a material on the back or front with both hands appeared to cause least sway length and instability.
박재규,오병성,유영문,윤만영,김대중,최용대,Park, J.G.,O, Byung-Sung,Yu, Y.M.,Yoon, M.Y.,Kim, D.J.,Choi, Y.D. 한국진공학회 2007 Applied Science and Convergence Technology Vol.16 No.3
Hot wall epitaxy 방법으로 우물층의 두께를 바꾸어가며 ZnSe/CdSe/ZnSe 단일 양자우물을 성장하였다. 양자우물층의 두께는 TEM을 이용하여 측정하였다. 광발광의 세기와 반치폭의 변화로부터 양자우물층의 임계두께는 약 $9{\AA}$임을 알 수 있었다. 우물층의 두께가 임계두께 보다 작을 때 광발광과 PLE 스펙트럼의 비교로부터 stoke's shift를 확인하였고, 이는 엑시톤 결합 에너지에 의한 것임을 알 수 있었다. 우물층의 두께에 대한 광발광 피크의 에너지 이동은 이론치와 잘 일치하였다. ZnSe/CdSe/ZnSe single quantum wells with different well thickness were grown by hot wall epitaxy. The quantum well thicknesses were measured by TEM. The critical thickness of single quantum well layer was found to be about $9{\AA}$ from the intensities and the full-width at half maximum of photoluminescence(PL) spectra. When the thickness of quantum wells was less than the critical thickness, the Stoke's shift was confirmed from the comparison between PL and photoluminescence excitation spectra, and it may be due to the exciton binding energy. The PL peak energy dependence on the quantum well thickness was coincident with the theoretical values.
박재규,송민제,한상필,김성일,송민협,Park, Jaegyu,Song, Minje,Han, Sang-Pil,Kim, Sungil,Song, Minhyup 한국전자통신연구원 2019 전자통신동향분석 Vol.34 No.5
Optical frequency comb generators have been investigated as a signal source capable of generating highly stabilized ultrafast pulse lasers. The precise control of the optical frequency comb spacing by RF clock signals has led to a revolutionary paradigm shift in the precise measurement of time and frequency. Optical frequency combs also have advantages such as stable frequency spacing, stable number of lines, and robustness. Owing to these characteristics, optical frequency combs have been applied to the fields of high precision optical clock, communication, spectroscopy, waveform generation, and astronomy. In this article, we introduce the properties (i.e., generation methods, advantages, and so on) of various optical frequency combs, and discuss the expected future technological trends and applications.