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A solution of Eggert's conjecture in special clases
김세경,박종률 호남수학회 2005 호남수학학술지 Vol.27 No.3
Let M be a finite commutative nilpotent algebra over a perfect field k of prime characteristic p and let Mp be the sub-algebra of M generated by xp,x ∈ M. Eggert[3] conjectures that dimkM ≥ pdimkMp.In this paper, we show that the conjecture holds for M = R+/I, where R = k[X1,X2, ,Xt] is a polynomial ring with indetermi nates X1,X2, ,Xt over k and R+ is the maximal ideal of R generated by X1,X2, ,Xt and I is a monomial ideal of R con taining X1 n1+1,X2 n2+1 , ,Xtnt+1 (ni ≥ 0 for all i).
Marsh와 Pond 형태의 인공 습지를 이용한 Parathion 농약의 처리에 관한 연구
김세경,최종규,오세희,강호정,조경덕,Kim, Se-Kyung,Choi , Jong-Kyu,Oh, Se-Hee,Kang, Ho-Jeong,Zoh, Kyung-Duk 한국환경보건학회 2004 한국환경보건학회지 Vol.30 No.3
The microcosm type wetland systems were constructed in order to treat wastewater contaminated with parathion. The microcosm reactor consisted of marsh and pond type. The experiment was carried out using batch (marsh or pond) and continuous (marsh-pond and pond-marsh type) systems. In the batch reactor, marsh-type wetland completely removed parathion in water within 8 days, while pond reactor removed 97% of parathion during the same period. During parathion degradation, the amount of 4-nitrophenol production, one of the metabolites from parathion degradation, was higher in marsh-type batch reactor. In the continuous systems, both marsh-pond and pond-marsh combination systems effectively removed parathion from water, and the production of 4-nitrophenol was also minimal. In the extraction experiment, the parathion and its metabolite were not found in the wetland soil and the plant. In order to achieve both aerobic and anaerobic conditions, the continuous wetland system combining marsh and pond type can be the alternative for the non-point source pollutants such as parathion pesticide.