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다목적 계획법을 활용한 김해와 부산지역 절화생산 농가의 영업계획 수립에 관한 연구
채수천,차재호,손기철 건국대학교 생명과학연구원 1994 생명과학지 Vol.1 No.-
본 연구는 절화 생산농가의 경영실태를 파악하고 경영진단을 위한 제 지표를 작성하고 주어진 가용 자원조건하에서 농가 gross margin의 극대화와 농번기 고용노동의 극소화를 동시에 얻을 수 있는 영농 계획수립 대안을 제시해 보고자 다목적 계획법(Multiobjective Programming)분석을 시도하였다. 본 연구의 기초가 되는 자료의 조사는 부산, 김해지역의 18개 절화 전업농가를 대상으로 하였으며, 그 결과를 요약하면 다음과 같다. 1) 조사농가의 호당 평균 경지면적은 1,550평이었으며 그중 75.7%는 임대경지로서 매우 영세하였고 호당 자가 노동력은 2.4인이였으며 고용 노동력은 1.7인이었다. 2) 재배현황은 Carmation, 장미, 안개초, Gerbera, 국화, Gladiolus, Iris, 금어초, Freesia 등의 9작목에 21개의 작부형태였다. 3) 작목별 노동 투하시간은 장미가 1,578시간으로 가장 많았으며, 글라디올러스 Ⅲ가 296시간으로 가장 적었다. 이익계수는 장미가 7,748천원으로 가장 높았고 다음은 Carnation, 안개초의 순이었다. 4) 다목적 계획 수립 기법을 이용한 이익의 극대화와 농번기 노동력의 최소화를 동시에 만족시켜주는 해결책으로는 위험을 선호하는 형(A, E 대안), 위험을 기피하는 형 (B대안), 중립적인 형(D대안)의 4가지 형태의 대안으로 나타났다. This case study is to investigate a real management condition of cut flower production farm houses and then to make indices for economic analysis, and on the basis of that, to generate a few possible alternatives for farmer's decision-making from problems involving conflicting goals which were related to maximize total gross margin and to minimize labour requirements in labour peak season such as April by multiobjective programming using NISE method. 18 farms located in Kimhae and Pusan area were selected as sample farms and surveyed for analysis. The results were as follows; Average farm area per farm house surveyed was 1,550 pyeong and 75.7% of area was leased, and self labour power and employment labour power per farm house was 2.4 and 1.7 persons, respectively. 9 crops such as carnation, rose, gypsophila, gerbera, chrysanthemum, gladiolus, iris, snapdragon and freesia were presently cultivated as 21 cropping patterns. Labour requirement was the largest for rose by 1,578 hours, and benefit coefficient was the largest for rose by 7,748 thousand won per 100 pyeong and followed by carnation and gypsophila. The alternatives of possible policies for cut flower production were found to be A and B as aggressive policies and C as a moderate policy, finally B as a conservative policy.
溫度 및 生長 調節劑 處理가 덴드로비움 노빌계의 揷木繁殖에 미치는 影響
채수천,손기철 한국화훼연구회 1996 화훼연구 Vol.5 No.2
Effects of temperatures and growth regulators on the shooting and rooting rate on the cutting propagation of Denbrobium nibile Lindle, Yukidaruma 'King' was investigated. The rate of shooting and rooting was increased and sprouting time was promoted by the treatment of high teaperature(30-35℃) but decreased by the treatment of low temperature(15-20℃). In the case of growth regulators(IAA, IBA GA3, and BA) experiment, the rate of shooting and rooting was higher in all growth regulators than control in which 200 ppm BA was the most effective. Finally, it was shown in combination treatments of temperature and growth regulator that application of growth regulator was not suitable for improving shooting and rooting under high temperature condition(30-35C). Under low temperature(20-25C) , however, 200 ppm BA treatment among growth regulators was found to be very effective in increasing shooting and rooting, and promoting sprouting time.
Putative association of RUNX1 polymorphisms with IgE levels in a Korean population
채수천,박병래,박춘식,류하정,양윤식,이수옥,최유현,김은미,우수택,김용훈,김가경,오범석,정헌택,김규찬,신형두 생화학분자생물학회 2006 Experimental and molecular medicine Vol.38 No.5
RUNX1, a member of the runt domain gene family of transcription factors, encodes a heterodimeric transcription factor and regulates the expression of hematopoiesis and myeloid differentiation. RUNX1 has been one of the target genes for research into various autoimmune disea-ses due to its properties as a transcription factor and functional distribution for chromosomal trans-location. In an effort to identify additional gene polymorphisms in which variants have been implicated in asthma, we investigated the genetic polymorphisms in RUNX1 to evaluate it as a potential candidate gene for a host genetic study of asthma and IgE production. We identified 19 sequence variants by direct DNA sequencing in 24 individuals of which four common variants were selected for genotyping in our asthma cohort (1,055 asthmatic patients, 384 normal controls). Using logistic regression analysis for association with the risk of asthma, while controlling for age, gender, and smoking status as of asthma were detected. However, two poly-morphisms in the promoter region (-2084G> C and -1282G>A) showed a marginal association with total IgE levels (0.03 and 0.03 in recessive models, respectively). Our findings suggest that poly-morphisms in RUNX1 might be one of the genetic factors for the regulation of IgE production
Association of TBX21 polymorphisms in a Korean population with rheumatoid arthritis
채수천,심승철,정헌택 생화학분자생물학회 2009 Experimental and molecular medicine Vol.41 No.1
TBX21 (T-bet) is a member of the T-box family of transcriptional factors that contain a conserved DNA binding domain. TBX21 is a critical regulator of the commitment to the Th1 lineage and IFN-γ production. Th1 and Th2 cells cross-regulate the differentiation of each other, and in this way TBX21 could be an attractive candidate gene for treating autoimmune disease such as rheumatoid arthritis (RA). In present study, we analyzed the genotypic frequencies of six polymorphisms of the TBX21 gene between the 367 RA patients and the 572 healthy controls. We showed that the g.-1514T>C and c.99C>G polymorphisms are suggestively associated with RA susceptibility. It is interesting that the genotypic frequencies of the TBX21 polymorphisms (g.-1514T>C and c.2103A>C) in the male RA patients were significantly different from the male control group (P = 0.0016 and 0.045, respectively). We also found that the g.-1514T>C and c.2103A>C polymorphisms of the TBX21 gene in the male RA patients have significant association with the levels of anti-CCP (P = 0.05) and rheumatoid factor (P = 0.03), respectively. These results suggest that the polymorphisms of the TBX21 gene might be associated with the susceptibility to male RA patients.
고준위 방사성 폐기물의 고정화를 위한 다상 고화체 합성
채수천,장영남,배인국,류경원,Chae Soo-Chun,Jang Young-Nam,Bae In-Kook,Ryu Kyung-Won 대한자원환경지질학회 2006 자원환경지질 Vol.39 No.2
석류석과 스피넬의 혼합성분$(Gd_3Fe_5O_{12}+(Ni_xMn_{1-x})(Fe_yCr_{1-y})_2O_4)$으로부터 고준위 방사성 폐기물의 고정화를 위한 다상 고화체를 $1200{\sim}1400^{\circ}C$에서 합성하였다. 이들 화학조성에서는 석류석, 페롭스카이트 및 스피넬이 관찰되었으며, 특히 석류석은 Fe의 함량이 가장 높았던 조성에서만 관찰되는 특성을 보임으로써 Fe의 함량이 석류석의 형성과 밀접한 관계를 지시하고 있다. 석류석의 성분은 Gd와 Fe가 각각 초과 및 결핍된 양상을 보였다. 이같은 석류석의 비화학 양론적인 조성은 상들과 원소간의 선호적 배분관계에 기인된 것으로 사료된다. The synthesis of polyphase waste form, which is an immobilization matrix fur the high level radioactive wastes, was performed with the mixed composition of garnet and spinel $(Gd_3Fe_5O_{12}+(Ni_xMn_{1-x})(Fe_yCr_{1-y})_2O_4)$ in the range of 1200 to $1400^{\circ}C$. The phases synthesized from all stoichiometric compositions were garnet, perovskite, and spinel. Especially, garnet was synthesized only in the composition of the highest content of Fe(y=0.9), whereas it was not synthesized in other compositions. This result indicated that the content of Fe was closely related to the formation of garnet. The composition of garnet revealed that the content of Gd was exceeded and that of Fe was depleted. Preferential distribution of elements in the phases can be attributed to the nonstoichiometric composition of garnet.