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황희진,신기일,Hwang, Hee-Jin,Shin, Key-Il 한국통계학회 2009 응용통계연구 Vol.22 No.2
국내외적으로 지역통계에 관한 관심이 높아지고 있으며 이와 관련하여 소지역 추정에 관한 많은 연구가 진행되고 있다. 소지역 추정에 사용되는 추정량의 대부분은 MSE(moan squared error)를 최소화하여 얻어진다 (Rao, 2003). 최근 황희진과 신기일 (2008)은 MSPE(mean squared percentage error)를 최소화하는 추정량을 사용한 소지역 추정법을 제안하였다. 본 논문에서는 노동통계 중 지청별 일인당 평균 임금총액 추정에 황희진과 신기일 (2008)이 제안한 방법을 적용하여 보았으며 2007년 매월 노동통계 자료를 이용하여 기존의 MSE를 최소화 하여 얻어진 여러 추정량과 우수성을 비교해 보았다. 또한 노동통계를 위 한 소지역 추정의 실제 사용 가능성을 살펴보았다. Many researches have been devoted to the small area estimation related with the area level statistics. Almost all of the small area estimation methods are derived based on minimization of mean squared error(MSE). Recently Hwang and Shin (2008) suggested an alternative small area estimation method by minimizing mean squared percentage error. In this paper we apply this small area estimation method to the labor statistics, especially monthly wages by a branch area of labor department. The Monthly Labor Survey data (2007) is used for analysis and comparison of these methods.
황희연,조만호,부성희,Tae-Ryong Hahn 한국식물생명공학회 2013 Plant biotechnology reports Vol.7 No.3
Leaf starch synthesized during the day fortransient storage of photoassimilated carbon is degradedthe following night to support respiration and growth inplants. Maltose is a major product of starch degradation,and is exported to the cytosol through the maltose transporter(MEX1). The Arabidopsis mex1 mutant displaysgrowth retardation and an exceptional chlorotic phenotypethat is not observed in other mutants demonstratingdefective starch synthesis or degradation. Consistent withthe chlorotic phenotype, proteomic analysis revealeddegeneration of the photosynthetic machinery in mex1, andthe down-regulation of essential components for photosynthesiswas also observed. The chlorosis observed inmex1 occurs during vegetative growth period under normalgrowth conditions, which is distinct from general senescence-induced chlorosis. No up-regulation of senescencerelatedgenes was found in the proteomic analysis of mex1,suggesting that the chlorotic process occurring in mex1 islikely distinct from senescence-dependent processes. Onthe other hand, cellular processes needed to survive stresssituations caused by the blocking of maltose export areinduced in mex1 by up-regulation of stress-related proteins,such as a germin-like protein and glutathione S-transferase. The increased abundance of heat shock protein 93-V participatingin chloroplast biogenesis and rubisco activase, aregulatory protein of photosynthesis, likely reflects anattempt by the mex1 mutant to maintain chloroplast functionto survive stress conditions.