http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
원통형조사창에서의 절리선 길이분포를 이용한 암반 내 절리직경분포 추정에 관한 연구
전기환(Kihwan Jeon),송재준(Jae-Joon Song),조영도(Young-Do Jo) 한국암반공학회 2011 터널과지하공간 Vol.21 No.5
본 연구에서는 암반 내 원통형 공동면에 나타나는 절리선 길이분포를 이용하여 암반 내에 존재하는 절리의 직경분포를 추정하기 위한 알고리듬을 제안하였다. 암반 내 절리의 직경분포를 추정하기 위해서 송재준(2005)에 의해 제시된 Joint Center Volume(JCV)의 개념이 적용되었다. 평면 조사창에 나타나는 절리선에 대한 JCV 값을 산정하는 송재준(2005)의 알고리듬을 확장하여 원통형 공동면을 조사창으로 하는 경우의 암반 내절리 직경분포 추정을 위해 전수조사 기법을 적용한 JCV 계산 알고리듬을 개발하였다. 추정된 절리 직경분포는 Monte-Carlo 시뮬레이션 기법을 이용하여 절리직경 모분포와 비교 검증하였으며 추정된 절리 직경분포가 모분포와 20% 내외의 오차 범위에서 수렴하는 것을 확인하였다. This study suggests an algorithm for estimating joint diameter distribution in rock mass from the joint trace length distribution around a circular tunnel. For estimating the joint diameter distribution the concept of Joint Center Volume (JCV) suggested by Song. (2005) was applied and the calculation method of JCV for the cylindrical window survey was developed by using the complete survey method. The estimated joint diameter distribution was verified against the original joint diameter distribution by Monte-Carlo simulation. It was observed that the estimated joint diameter distribution was converged to the original joint diameter distribution with less than 20% of error.
시스템 사고를 활용한 낙동강 지역의 생태계서비스 분석 및 회복력 향상 계획: 합천창녕보 지역을 중심으로
송기환 ( Song Kihwan ),전진형 ( Chon Jinhyung ),최남희 ( Choi Namhee ) 한국시스템다이내믹스학회 2021 한국시스템다이내믹스 연구 Vol.22 No.2
The purpose of this paper is to analyze the feedback structure of the ecosystem services changed after the development of the Four Major Rivers using systems thinking in the Nakdong river area and to suggest resilience improvement plans. First, this study classify ecosystem services in the Nakdong river area by provisioning, regulating, cultural, and supporting ervice categories and derived related variables for each category. Second, this study analyze the changes in ecosystem services and the relationship between each ecosystem service in the process of the development of the Four Major Rivers through causal loop diagrams. Third, this study suggest plans to improve resilience to provide ecosystem services continuously based on the principles of ecosystem service resilience. The results of this study can provide background information for policies to adequately solve the various problems and issues in river development in national units. These findings also provide a basis for the development and restoration of rivers that can improve the resilience of ecosystem services at the national level.
Khin Thanda Win,Chunying Zhang,Kihwan Song,Sanghyeob Lee 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Cucumber is a typical monoecious plant with individual male and female flowers, and sex expression in cucumber is mainly determined by three major genes: F/f, M/m and A/a. Gynoecy plays an important role in cucumber hybrid breeding and use of gynoecious lines as maternal parent ensures high productivity. The purpose of this study is to identify a co-dominant molecular marker linked to F locus to distinguish homozygous and heterozygous gynoecious plants for cucumber breeding programme. Firstly, we analyzed the sequence polymorphism of 5 gynoecious and 5 monoecious inbred lines to detect polymorphism to develop the marker linked to F locus. A pair of specific primer based on insertion/deletion polymorphism on branched-chain amino acid transaminase (BCAT) gene was designed and examined the polymorphism in the parents, F1 and F2 segregating population derived from gynoecious (WJEF11) and monoecious (WNEF8) inbred lines. The result showed that the specific fragment amplified with Cs-Female-F/Cs-Female-R, was identified as a co-dominant marker and co-segregated with sex phenotype in F2 population. Furthermore, we present a new linkage map for F locus using Indel markers. This is the first report for the development of F locus specific co-dominant marker which can distinguish homozygous and heterozygous gynoecious and it could be used in marker-assisted selection in cucumber breeding.