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A way forward for the future Biofuel vegetable 2 oil markets: Evidence from 3 information flow
Seunghoon Lee(이승훈),Eojin Yi(이어진),Yelim Cho(조예림),Kwangwon Ahn(안광원) 대한산업공학회 2020 대한산업공학회 추계학술대회논문집 Vol.2020 No.11
본 연구는 팜유 및 대두유 시장과 원유 시장 간 정보 흐름을 분석하여 식물성 유지 시장, 특히 팜유 시장의 발전방안을 제시하고자 한다. 그래인저 인과관계 테스트 결과와는 다르게, 전이 엔트로피를 통해 각 시장 간에는 상호 정보 흐름이 존재함을 확인하였다. 특히, 식물성 유지 시장 간 존재하는 순정보흐름은 시장 규모 및 유동성에 따라 대두유 선물 시장에서 팜유 선물 시장 방향으로 나타났는데, 이는 시장의 가격 발견 가설을 지지함과 동시에 아직은 팜유 선물 시장은 여러 제약조건으로 인해 정보가 효과적으로 반영되지 않은 시장임을 보여준다. 정책 입안자들은 이러한 문제를 해결할 수 있는 제도 개선, 즉 xxx를 통해 바이오 연료의 원료로서 팜유 시장의 발전 가능성을 타진해 볼 수 있을 것이다.
학문 목적 한국어 말하기 능력 평가 도구 개발을 위한 요구 분석
홍은실 ( Eunsil Hong ),박현정 ( Hyunjeong Park ),조수진 ( Sujin Cho ),민병곤 ( Byeonggon Min ),안현기 ( Hyunkee Ahn ),오예림 ( Yelim Oh ),강석한 ( Seokhan Kang ) 국제한국어교육학회 2016 한국어 교육 Vol.27 No.4
The purpose of this study is to analyze the interested groups` needs for Korean speaking test for academic purposes. Two hundred twenty nine foreign university students who have studied in undergraduate and graduate schools, one hundred three professors who have taught foreign students, and forty one university institutional staff members whose work is related to foreign students have taken part in the survey. The direction for testing Korean speaking test for academic purposes and the considerations in developing Korean speaking test for academic purposes were investigated through the needs survey. The results indicate that Korean speaking test for the academic purposes should be adopted because the tests for the general purposes could not cover the academic ability for the foreign students. Also the criteria for the test are needed to be set up to mitigate the perception gap of interested groups` academic speaking proficiency. Futhermore, we reviewed various constructs beyond linguistic competence and considered test takers` background variables when we develop Korean speaking test for academic purposes.
Mingyun Lee,Jong-Nam Oh,Gyung Cheol Choe,Kwang-Hwan Choi,Dong-Kyung Lee,Seung-Hun Kim,Jinsol Jeong,Yelim Ahn,Chang-Kyu Lee Asian Australasian Association of Animal Productio 2023 Animal Bioscience Vol.36 No.12
Objective: Nanog homeobox (NANOG) is a core transcription factor that contributes to pluripotency along with octamer binding transcription factor-4 (OCT4) and sex determining region-Y box-2 (SOX2). It is an epiblast lineage marker in mammalian pre-implantation embryos and exhibits a species-specific expression pattern. Therefore, it is important to understand the lineage of NANOG, the trophectoderm, and the primitive endoderm in the pig embryo. Methods: A loss- and gain-of-function analysis was done to determine the role of NANOG in lineage specification in parthenogenetic porcine blastocysts. We analyzed the relationship between NANOG and pluripotent core transcription factors and other lineage makers. Results: In NANOG-null late blastocysts, OCT4-, SOX2-, and SOX17-positive cells were decreased, whereas GATA binding protein 6 (GATA6)-positive cells were increased. Quantitative real-time polymerase chain reaction revealed that the expression of SOX2 was decreased in NANOG-null blastocysts, whereas that of primitive endoderm makers, except SOX17, was increased. In NANOG-overexpressing blastocysts, caudal type homeobox 2 (CDX2-), SOX17-, and GATA6-positive cells were decreased. The results indicated that the expression of primitive endoderm markers and trophectoderm-related genes was decreased. Conclusion: Taken together, the results demonstrate that NANOG is involved in the epiblast and primitive endoderm differentiation and is essential for maintaining pluripotency within the epiblast.