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이재기 ( Jea Ki Lee ),봉왕근 ( Woang Keun Bong ) 충북대학교 건설기술연구소 2011 建設技術論文集 Vol.30 No.2
대상사면의 유지관리를 위한 기존계측방법은 육안에 의한 정기점검, 간이 인장계를 이용한 사면의 균열 측정과 사면 전반에 걸쳐 관측점을 설치하여 모니터링 하는 방법이 대부분이었다. 본 연구에서는 관측점 자체를 직접 암반위에 설치하고 위험 구간에 대해서는 대상물에 레이저빔을 투사하여 대상을 표면에 대한 수많은 측점의 3차원 공간좌표를 연속적으로 얻을 수 있는 3차원 레이저 스캐닝 방법을 이용하여 실험하였다. 본 연구에서는 대형구조물의 안정성 확보를 위하여 그 구조물 주위의 굴착한 암반사면에 주기적인 상시 계측 시스템을 도입하여 변위를 측정하고, 분석된 자료를 토대로 위험 구간을 설정하여 3차원 레이저 스캐너로 정밀 계측을 하는 암반 사면의 유지관리를 위한 기법을 제시하고자 하는데 그 목적이 있다. 본 연구를 통하여, 위험 사면지역의 반사경 설치를 토사위에 설치하는 것보다 암반위에 설치함으로써 사면 이동 여부를 정확히 알 수 있었다. Rock slope are mostly sharp slope, methods to judge the joint and discontinuities in the rock slope to manage effectively have extreme limitation and restriction due to accessibility. If these rock slope are destroyed, loss of life and property directly would have been occurred. Take the additional damages into consideration, we are necessary that measurement systems are build for maintenance of rock slope regularly. This study analyzed existing measuring data and then selected the danger region of rock sliding. Nine measuring point on the soil are installed directly on the rock. And automatic measurement systems are introduced for observation a deformation of rock slope. Also the danger region adopted terrestrial 3D laser scanning technology, and developed the technology to analyze the entire deformation of rock slope periodically.
Mo 하지층의 첨가원소(Ti) 농도에 따른 Cu 박막의 특성
홍태기,이재갑,Hong, Tae-Ki,Lee, Jea-Gab 한국재료학회 2007 한국재료학회지 Vol.17 No.9
Mo(Ti) alloy and pure Cu thin films were subsequently deposited on $SiO_2-coated$ Si wafers, resulting in $Cu/Mo(Ti)/SiO_2$ structures. The multi-structures have been annealed in vacuum at $100-600^{\circ}C$ for 30 min to investigate the outdiffusion of Ti to Cu surface. Annealing at high temperature allowed the outdiffusion of Ti from the Mo(Ti) alloy underlayer to the Cu surface and then forming $TiO_2$ on the surface, which protected the Cu surface against $SiH_4+NH_3$ plasma during the deposition of $Si_3N_4$ on Cu. The formation of $TiO_2$ layer on the Cu surface was a strong function of annealing temperature and Ti concentration in Mo(Ti) underlayer. Significant outdiffusion of Ti started to occur at $400^{\circ}C$ when the Ti concentration in Mo(Ti) alloy was higher than 60 at.%. This resulted in the formation of $TiO_2/Cu/Mo(Ti)\;alloy/SiO_2$ structures. We have employed the as-deposited Cu/Mo(Ti) alloy and the $500^{\circ}C-annealed$ Cu/Mo(Ti) alloy as gate electrodes to fabricate TFT devices, and then measured the electrical characteristics. The $500^{\circ}C$ annealed Cu/Mo($Ti{\geq}60at.%$) gate electrode TFT showed the excellent electrical characteristics ($mobility\;=\;0.488\;-\;0.505\;cm^2/Vs$, on/off $ratio\;=\;2{\times}10^5-1.85{\times}10^6$, subthreshold = 0.733.1.13 V/decade), indicating that the use of Ti-rich($Ti{\geq}60at.%$) alloy underlayer effectively passivated the Cu surface as a result of the formation of $TiO_2$ on the Cu grain boundaries.
김재현 ( Jae Hyun Kim ),최진형 ( Jin Hyung Choi ),조인기 ( In Ki Cho ),정화정 ( Hwa Jeoung Jeong ),허은지 ( Eun Ji Heo ),임승범 ( Suang Bum Lim ),신다혜 ( Da Hye Shin ),윤의정 ( Eui Jeong Yoon ),이지선 ( Ji Sun Lee ),이재인 ( Jea 대한신경치료학회 2012 신경치료 Vol.16 No.1
Purpose The purpose of this study was carried out to determine the normal predictive equation of pulmonary function and related factors in Korean young adult(university students) using spirometer. Methods Measured the FVC (Forced Vital Capacity), FEV 1 (Forced Expiratory Volume in one second), ERV(expiratory reserve volume),VC(vital capacity) and surveyed body height, body weight. years. Study group was total I02(male 57, female 45)who were sampled from healthy young adults(Age is 18-28) at the shinsung university in dang gin city. Result The results of this study were summarized as follows: (I) FVC in male and female was 4.6±0.6 L. 3.3±OA L. FEV1 in male and female was 3.9±0.5 Land 2.7 ±OAL. (2) In correlation analysis, FVC, FEV1 showed positive correlation with body height body weight and negative correlation with age. (3) The prediction equation for FVC was 0.077 X height(cm)+0.020 X years +0.002 x weight-9.387 in male, and 0.030xheight(cm)+0.023xyears+0.006xweight-2A68in female. (4) The prediction equation for FEV1 was 0.055 x height( cm) -0.007 x years +0.003 x weight-5.855 in male, and 0.32 x height( cm) +0.007 x years -0.0 11 x weight (kg)-2.029 in female. Conclusion In conclusion, these results suggest that body height, body weight have significant association with pulmonary function. More research is need in the further for using these parameters in predictive equation.
이기준,이재락 한국화학공학회 1981 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.19 No.1
線形 高分子物質로서 國內에서 生産되는 PVC, LDPE, HDPE, 및 PP 等의 유리전이 현상과 弛緩영역에 대한 可塑劑의 영향, 분자구조형태의 영향 및 분자운동론적 특성을 Rheovibron DDV-II-C를 사용하여 조사하였다. 실험결과를 Zener 모델등을 써서 검토하였는 바, PVC-36과 直線形구조를 갖는 PP의 유리전이는 單一이완의 형태를 보이며, PP의 구조형태는 유리질 상태에서의 彈性率과 유리전이 영역에서의 거동에 주로 영향을 미쳤다. 그리고 PVC-52의 경우에는 유리이완의 頂點 以上의 溫度에서 가소제와 樹脂사이에 相分離현상이 일어남이 관찰되었다. 또한 LDPE의 경우에는 β이완이 유리전이에 못지 않게 중요함을 보여주나 WLF式의 적용은 곤란하였다. HDPE에 대해서는 그 分子鎖가 충분히 線形으로 배열된 E3O8의 경우에는 log a(T)=-0.71(T-T_g)/T-T_g + 17.41 의 관계식이 성립됨을 보였다. Transition phenomena of linear polymers such as polyvinylchloride, low density polyethylene, high density polyethylene and polypropylene manufactured locally were investigated with the Rheovibron Model DDV-II-C. Plasticisers employed, morphology, and molecular characteristics of the polymers gave notable effects and these were discussed using the Zener model. Both the PVC-36 and the linearly oriented PP showed single relaxations in the glass transition. The glass transition and the dynamic storage modulus of the PP at the glassy state were affected mostly by its morphology. In case of the PVC-52, remarkable phase separation was observed beyond the peak temperature of the glass transition. The β relaxation seems to be as much important as the γ relaxation for the LDPE, but the WLF equation could not be employed for the analysis. The equation could be used for the linearized HDPE E 308 and the relationship. log a(T)=-0.71(T-T_g)/T-T_g+17.41 was established accordingly.