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옥천대의 중생대 이래의 지구조적 운동에 관한 고지자기 연구
이윤수,민경덕,Lee, Youn Soo,Min, Kyung Duck 대한자원환경지질학회 1995 자원환경지질 Vol.28 No.5
Carboniferous and Cretaceous rock samples were collected from 3 and 12 sites respectively in the vicinity of the Okcheon Zone. Mean directions of characteristic component magnetizations from Carboniferous rocks along the Honam Shearzone reveal that the Okcheon zone was considerably rotated and deformed during Triassic. The amount of rotations were clockwisely $80.3^{\circ}$ in Mungyeong and $42.4^{\circ}$ in Hwasun areas. Mean directions of characteristic component magnetizations obtained from Cretaceous Yeongdong and Neungju Basin were identical to those from the Gyeongsang Basin in the Yeongnam Block indicating no relative motion between them since Cretaceous. Cretaceous paleopole position from 4 locations, $204.9^{\circ}E$ in longitude and $65.1^{\circ}N $ in latitude.
혼합효과가 DMA와 CPC를 이용한 입자분포 측정에 미치는 영향에 관한 연구
이윤수,안강호,김상수,Lee, Youn-Soo,Ahn, Kang-Ho,Kim, Sang-Soo 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.3
In the measurement using DMA and CPC in series, there is some time delay for particles classified in DMA to detect in CPC. During this time, the DMA time-response changes due to the velocity profile of sampling tube and the diffusion of particles in the volume that exists between the DMA exit and the detector of ultra-fine CPC. This is called mixing effect. In the accelerated measurement methods like the TSI -SMPS, the size distribution is obtained from the correlation between the time-varying electrical potential of the DMA and the corresponding particle concentrations sampled in DMA. If the DMA time -response changes during this delay time, this can cause the error of a size distribution measured by this accelerated technique. The kernel function considering this mixing effect using the residence time distribution is proposed by Russell et al. In this study, we obtained a size distribution using this kernel to compare to the result obtained by the commercial accelerated measurement system, TSI -SMPS for verification and considered the errors that result from the mixing effect with the geometric mean diameters of originally sampled particles, using virtually calculated responses obtained with this kernel as input data.
가출 청소년의 사회적응성 향상을 위한 쉼터 개선 및 가상현실(VR) 프로그램 활용 방안
이윤수 ( Lee¸ Youn-soo ) 한국소년정책학회 2021 少年保護硏究 Vol.34 No.2
This study has exploration of Virtual Reality Program element for adjustment resilience of review the readiness of independent living of runaway youths at the youth shelters under the assumption that there haven’t been enough studies about the readiness for successful independent living of the runaway youth at those shelters. The purpose of this research is to present fact that the runaway youth have experienced youth misconduct for satisfying their needs and is to emphasis the necessity of youth shelter to protect the runaway youth for prevention of their misconduct and is to present the roles of youth shelter for the runaway youth misdeeds prevention and the right guidance through the facility extension of youth shelter the public relations and service improvement. Especially, this study has focused on the extent of the readiness of the runaway youth, the relevance with sub-variables and influencing factors for independent living at those mid & long-term shelters. community activities and supports from community showed all meaningful relevance to all self-management. this study have been research literature research and Focus group interview of 5 to Youths Shelter manager. Youths Shelters are operated according to three models building a systematic network among shelters and the development of professional expertise are vital to the success of shelters. Shelters of each model type should be characteristically developed. This thesis shows that Viral Reality technique which make a per son be able to look, feel, hear and inter action in the computer generated situation can over come some of the difficulties inherent in the traditional treatment of phobias. Youths Shelter needed appreciated of the various establishment a peculiarity and they connectivity and exploration of Virtual Reality therapy, program, network for the improvement and synergy effect.
마그마의 분화과정과 Eu 동위원소 분별작용: 백두산 화산암과 울릉도 화산암의 비교
이승구(Seung-Gu Lee),Shuang-Shuang Chen,이승환(Seung Hwan Lee),김현철(Hyeoncheol Kim),이윤수(Youn Soo Lee),이태종(Tae Jong Lee),오창환(Chang Whan Oh),최성희(Sung Hi Choi) 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
최근 마그마의 분화과정에 따른 Mg, Fe, Ti 등과 같은 원소들의 안정동위원소 분별작용 발생에 대한 연구결과가 활발하게 보고되고 있다. 희토류원소중의 하나인 Eu은 두개의 동위원소(<SUP>151</SUP>Eu, <SUP>153</SUP>Eu)만을 갖고 있다. 최근 Lee and Tanaka (2019, 2021a)는 희토류원소 중의 하나인 Eu의 안정동위원소의 새로운 분석법을 개발하였고, 이를 토대로 하여 분화된 화강암에서 Eu 동위원소의 분별작용이 발생되었음을 보고하였다(2021B). 현재 화강암을 비롯하여, 다양한 화성암류에서의 Eu 동위원소 분별작용 발생여부에 대한 보고는 거의 없다. 백두산과 울릉도는 우리나라의 대표적인 화산암체 지역이다. 이 발표에서는 백두산과 울릉도에서 채취된 화산암류에서의 희토류원소 분포도의 특성과 Eu 동위원소비의 차이(즉, 동위원소 분별작용)을 비교하여 두 지역에 분포하는 화산암의 동위원소 지구화학적 차이에 대해 토의하고자 한다. Lee, S.-G. and Tanaka, T., 2019, Determination of Europium isotopic ratio by multi-collector inductively coupled plasma mass spectrometry using a Sm internal standard, Spectrochim. Acta Part B, 156, 42-50. Lee, S.-G. and Tanaka, T., 2021a, Gd matrix effects on Eu isotope fractionation using MC-ICP-MS: Optimizing Europium isotope ratio measurements in geological rock samples. Int. J. Mass. Spec., 116668. Lee, S.-G. and Tanaka, T., 2021b, Eu isotope fractionation in highly fractionated igneous rocks with large Eu negative anomaly Geochem. J., 55(4), e9-e17.