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최정윤 ( Choe Jeong Yun ),김정봉 ( Kim Jeong Bong ) 한국수산경영학회 2003 수산경영론집 Vol.34 No.2
This study analysis the market status and competitive structure of Korean fishery in Japan import market, and derive policy implications for seeking main causes. Specifically, trade state between Korea and Japan is discovered and theoretical model is also used to analysis competitiveness between two countries. And then real measuring methods of competitive index is introduced, the status of Korean fishery products in Japan import market is analysed totally through the study of comparative predominance and export competition. The analysis in based on the statistical methods such as RCA, RMI, and CMS. In summary, first Korean fishery products have the comparative predominance in Japan, China and Thailand, but they have the comparative inferiority in USA, considering research results. Second, competitiveness of fishery products between Korea and in Japan import market extreme, relatively, competitiveness of Korean fishery products for Thailand`s fishery products is lowest. Third, Korean fishery products maintain unconstant pattern, but competitive inputs result in increasing export to Japan generally.
최정윤 ( Choe Jeong Yun ),남수현 ( Nam Su Hyeon ),강석규 ( Kang Seog Gyu ) 한국수산경영학회 2003 수산경영론집 Vol.34 No.2
The purpose of this study is to evaluate the managerial efficiency of fisheries cooperatives in Korea by using data envelopment Analysis(DEA). The DEA method is a relative evaluation method on the basis of linear programming. Also, it is known as a useful method for the evaluation of not-for-profit organizations which cannot be measured by mere monetray units for their performances. The 50 units have been taken for the purpose of analysis. All of the units are homogeneous groups, and the produce multiple services with multiple inputs. Input variables are na number of employee, fixed assets, and business managerial costs. Output variables include a number of deposits, a number of loans, a total deposits, a total loans, and operational income for one year. The empirical results of this study are as follows. First, the average technical efficiency showed 82.35% which revealed about 17.65% of non-efficiency in 2001. Second, in 15 DMUs, the overall inefficiency is mainly attributed to their efficient operations or management. To be opposed, in 18 DMUs, the overall inefficiency is mainly attributed to their scale efficiency. Third, efficiency ranking results by DEA do not agree with the ratio analysis by fisheries cooperatives. Fourth, average efficiency level by year was improving gradually by 0.7408 in 1999, 0.8023 in 2000, and 0.8235 in 2001 at significant 10% level.
"편리해서 너무 좋다" 시간과 공간을 뛰어넘는 신규 무선통신 서비스의 종류와 내용
최성열,최정윤,Choe, Seong-Yeol,Choe, Jeong-Yun 한국정보통신집흥협회 1995 정보화사회 Vol.97 No.-
무선통신은 장소나 시간상의 제약에서 자유로울 수 있다는 장점으로 인해 미래 정보통신의 시스팀의 한 대안으로 각광받고 있다.
Jae-Moon Shin(신재문),Yun-Jeong Jeong(정윤정),Kwan-Kyu Park(박관규),Jung-Yoon Choe(최정윤),Sang-Mi Han(한상미),Kwang-Gill Lee(이광길),Joo-Hong Yeo(여주홍),Il-Kyung Chung(정일경),Young-Chae Chang(장영채) 한국생명과학회 2012 생명과학회지 Vol.22 No.1
봉독은 동양의학에서 관절염, 류마티즘 및 각종 암을 포함하여 다양한 질병을 치료하기 위하여 이용되었다. 최근 봉독의 신생혈관 억제효과에 대한 연구가 보고되었으나 정확한 분자메커니즘에 대해서는 보고가 미흡하다. 따라서, 본 연구는 봉독이 인간결장암세포인 HCT116세포에서 신생혈관생성과 종양진행에 중요한 역할을 하는 HIF-1α와 VEGF 발현 억제효과를 조사하였다. 그 결과 봉독은 CoCl₂로 유도한 저산소 상태에서 VEGF와, HIF-1α의 발현을 감소시키며 HIF-1α의 promoter 영역인 HRE 활성을 억제하였다. 이러한 봉독의 HIF-1α 발현억제효과는 ERK1/2의 인산화 조절을 통한 것이며, 봉독은 p38, JNK, AKT의 인산화에는 영향을 끼치지 않았다. 또한 봉독의 효과를 나타내는 단일물질 탐색을 위해 봉독의 생리활성 물질로 알려진 아파민과 멜리틴을 조사한 결과, HIF-1α와 VEGF 억제효과는 아파민에 기인하는 것이라고 예상 할 수 있었다. 이와 같은 결과를 통하여 본 연구에서는 봉독의 혈관신생 억제에 대한 새로운 신호전달기전 및 인간 결장암세포 전이 억제제로서의 잠재성을 확인하였다. Bee venom (BV) has been used in medicine to treat a variety of diseases including arthritis, rheumatism, and various cancers. Recent reports indicate that BV has anti-angiogenic effects, but the precise molecular mechanism underlying the effects of BV against colorectal cancer remains to be elucidated. We examined the effects of BV and its major components (melittin and apamin) on tumor angiogenesis and found that BV significantly decreased protein levels of hypoxia-inducible factor-1α (HIF-1 α), an important factor involved in angiogenesis and tumor progression, in human colorectal carcinoma HCT116 cells. BV also suppressed the transcription of HIF-1α under hypoxia, leading to a decrease in the expression of vascular endothelial growth factor (VEGF), a major target gene of HIF-1α. We also found that these effects were mainly elicited by apamin, but not melittin. BV specifically inhibited the phosphorylation of ERK1/2 without changing the total levels of this protein, but had no effect on kinases of p38/JNK and AKT. Our results suggest that BV may inhibit human colorectal cancer progression and angiogenesis by inhibiting HIF-1α and VEGF expression, thereby providing a novel potential mechanism for the anticancer action of BV.
어린이박물관에서의 아동과 어머니의 전시참여형태와 아동과 어머니 간의 상호작용에 관한 연구
이경희(Lee Gyeong Hui),최정윤(Choe Jeong Yun) 한국아동학회 2004 兒童學會誌 Vol.25 No.1
The present study conducted in the Children`s Museum investigated patterns of participation by type of exhibit and interaction with 150 5-to 12-year-old children and 50 mothers. A timing and tracking observation checklist was used to document time spent at each type of exhibit and the interaction of children and mothers. All children chose and spent more time interacting with participatory than non-participatory exhibits and they chose more participatory exhibits than mothers. Mothers chose more non-participatory than participatory exhibits and spent more time with non-participatory exhibits than the preschool group. The preschool age group interacted with mothethan other interactions.
국내 에이즈환자에서 발견된 새로운 인간면역부전 바이러스 아형
김남중,이선희,박상원,최희정,김도마,최정윤,김진욱,김의석,Feng Gao,오명돈,최강원 대한감염학회 2001 감염 Vol.33 No.2
Backgroud : In the previous study, we determined subtypes of Human Immunodeficiency Virus type 1 (HIV-1) in Korean patients by partial sequence analysis. We showed that eighteen of the nineteen sequences of HIV-1 from Korean fell into subtype B and one fell into subtype A. At that study, HIV-1 identified as subtype A showed 40% diversity from reference sequences and presumed to be a variant of subtype A. The aim of present study is to determine the molecuar biological characteristics of HIV-1 previously identified as subtype A. Methods : Growth curve was determined. SI/NSI phenotype was determined using a cocultivation assay using MT-2 cells. A complete genome sequence was obtained by amplifying overlapping PCR fragments. Cowork was done to identify the subtype of HIV-1 previously identified as variant A from Korea (97-KRO04), Cyprus (94CY017), Democratic Republic of Congo (97CDKTB48, 97CDKFE4, 97CDKS10, 97-CDKP58). Phylogenetic analysis, distance analysis, diversity plot analysis, bootstrap anlysis were done to identify the subtype of these newly characterized strains. Results : We found that 97KR004 was SI pheno-type. Complete sequence of 97KR004 was determined (AF286239). Phylogenetic analysis showed that the four newly characterized strains (94CY017, 97CDKTB-48, 97CDKFE4, 97CDKS10) were closely related to subtype A. Subtype distance tool showed that these four strains fell to sub-subtype A2. Diversity plot an-alysis and bootstrap analysis were done to identify subtype of 97KR004. Nine subtype reference strains and 94CY017 strain were used as reference sequences. These analyses confirmed that 97KR004 represented sub-subtype A2/subtype D recombinant. Conclusion : We showed that 97KR004 fell into newly identified sub-subtype A2. (Korean J Infect Dis 33:71∼77, 2001)