• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.198-198
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• 2022

• 충청수학회지
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• 제25권1호
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• pp.91-95
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• 2012

In this paper, we show how to construct the first layer $k^{\alpha}_{1}$ of anti-cyclotomic ${\mathbb{{Z}}}_{3}$-extension of imaginary quadratic fields $k(=\;{\mathbb{{Q}}}(\sqrt{-d}))$ when the Sylow subgroup of class group of k is 3-elementary, and give an example. This example is different from the one we obtained before in the sense that when we write $k^{\alpha}_{1}\;=\;k({\eta}),{\eta}$ is obtained from non-units of ${\mathbb{{Q}}}({\sqrt{3d}})$.

• 한국작물학회지
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• 제45권2호
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• pp.103-107
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• 2000

The viviparity of 28 rice varieties was tested at 25 days after heading(DAH), 35DAH, and 45DAH in the laboratory and field condition for 12 days. The incubation temperature was 20/l$0^{\circ}C$ (day/night), 25/15$^{\circ}$C$ and 30/20$^{\circ}$C$ in the laboratory test, and under field water conditions in the field test. The biggest varietal difference of viviparity was found in the laboratory test when examined at 45DAH with the 6-day incubation under 25/15$^{\circ}$C$ . At this conditions the mean viviparous ratio was 32.1 % with the range of 53.9 and the variance of 259.5. In the field test, the significant varietal difference in the viviparity was also found in the lodging treatment at 45 DAH for 6 days. Correlation coefficient analysis between the field and laboratory tests was highly significant from 4 days after incubation at 45 DAH and after 6-day incubation at 35 DAH, and correlation coefficient was higher as incubation days in the laboratory and submerged days under field water became longer. Considering the correlation between the field and laboratory tests, varietal difference of viviparity and convenience of testing, the laboratory test at 45 DAH for 6-day incubation under 25/15$^{\circ}$C$ was the most efficient evaluation method for the viviparity of rice cultivar.

• Korean Journal of Mathematics
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• 제21권3호
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• pp.265-270
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• 2013

In this paper, using a theorem of Brink for prime decomposition of the anti-cyclotomic extension, we explicitly construct the first layer of the anti-cyclotomic $\mathbb{Z}_3$-extension of imaginary quadratic fields.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2020년도 추계학술대회
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• pp.150-150
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• 2020

• 대한수학회보
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• 제43권1호
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• pp.77-80
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• 2006

Let K be a number field, $K_n$ its ray class field with conductor n and L a Galois extension of K containing $K_n$. We prove that $L/K_n$ has a relative integral basis (RIB) under certain simple condition. Also we reduce the problem of the existence of a RIB to a quadratic extension of $K_n$ under some condition.

• 농촌지도와개발
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• 제15권4호
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• pp.621-658
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• 2008

The study uses case study to explore the relations between the Living Improvement Project as a cooperative agricultural extension since 1948 and the Rural Tourism Development as a community development since 1992. And this study aims to examine the extension agent's field activity and tourism impacts to be supported by means of government policies during fifty years.

• 대한수학회논문집
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• 제18권1호
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• pp.159-168
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• 2003

In this paper we discuss the Construction Of 3 new extension field of characteristic odd and analyze the complexity of arithmetic operations over such a field. Also we show that it is suitable for Elliptic Curve Cryptosystems(ECC) and Digital Signature Algorithm(DSA, 〔7〕) as an underlying field. In particular, our digital signature scheme is at least twice as efficient as DSA.

• 생물환경조절학회지
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• 제21권4호
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• pp.392-397
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• 2012

참죽나무 순채 조기생산을 위하여 하우스와 노지재배에서 생산된 잎의 무기성분을 분석한 결과는 다음과 같다. 참죽나무 순채의 생장속도는 노지에 비하여 하우스 재배에서 다소 빠른 경향이었고, 정아의 경우 초장, 가지수 등 생육과 생체 중, 엽록소 함량 등 품질은 노지와 하우스재배 처리 간 큰 차이가 없었다. 참죽나무 순채의 색도(a값)는 측아보다는 정아에서 적색도가 다소 높았으나 하우스와 노지재배 간에는 차이가 거의 없었다. 참죽나무 정아 및 측아의 pH는 5.7~6.2 정도였고 N 함량은 측아의 평균 $500.5mg{\cdot}kg^{-1}$에 비해 정아에서 3.1배 많았고, 노지재배($1,430mg{\cdot}kg^{-1}$)보다는 하우스 재배에서 1.2배 많았다. P, Ca, Mg 및 Fe 함량도 노지재배에 비하여 하우스 재배에서 유의성 있게 높았는데, P는 1.1배, Ca는 1.7배, Mg는 2.0배, Fe는 2.3배 정도 많았으나 K 함량은 하우스 재배의 $2.94mg{\cdot}kg^{-1}$에 비하여 노지재배에서 1.6배 많았다. Ascorbic acid 함량은 하우스 측아에서 $1,461mg{\cdot}kg^{-1}$으로 가장 높았고 노지 측아, 노지 정아, 하우스 정아 순이었다. 이상의 결과를 종합하면 고품질 참죽나무 순채 생산을 위해서 하우스 재배가 필요한 것으로 생각된다.

• The Journal of Asian Finance, Economics and Business
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• 제8권2호
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• pp.1215-1224
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• 2021

This research aims to discuss the relationship between the courage, anticipation, and satisfaction comprehensively. This study will be complemented by gratitude as a variable that moderates the relationship between courage and anticipation, as well as the relationship between the courage and satisfaction. The large area as survey location is the reason for sampling conducted in 2 stages: (1) taking 15 districts through judgement sampling, (2) allocated sub-districts sample through proportional random sampling. The sample used in this study were 155 sub-districts in East Java. Respondents in each sub-district consisted of 1 farmer and 1 field extension officer to get a total of 310 respondents. The analysis method used to test the hypothesis was Structural Equation Modeling (SEM). The findings of this research are: (1) The courage of field extension officers' have a positive but non-significant direct effect on farmers' anticipation, however, the effect significantly strengthen with religiosity as moderation; (2) The courage of field extension officers' and farmers' anticipation have a significant and positive effect on satisfaction. This study will be complemented by gratitude as a variable that moderates the relationship between the courage and anticipation, as well as the relationship between courage and satisfaction.