• Proceedings of the Korean Society of Crop Science Conference
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• 한국작물학회 2022년도 추계학술대회
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• pp.198-198
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• 2022

• Journal of the Chungcheong Mathematical Society
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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 ${\mathbb{{Q}}}({\sqrt{3d}})$.

• KOREAN JOURNAL OF CROP SCIENCE
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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.

• Proceedings of the Korean Society of Crop Science Conference
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• 한국작물학회 2020년도 추계학술대회
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• pp.150-150
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• 2020

• Bulletin of the Korean Mathematical Society
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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.

• Journal of Agricultural Extension & Community Development
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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.

• Communications of the Korean Mathematical Society
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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.

• Journal of Bio-Environment Control
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• 제21권4호
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• pp.392-397
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• 2012

In this study, we investigated the changes of growth characteristics, mineral and chlorophyll content of young leafy vegetable of Chinese toon grown under greenhouse and open fields. Results showed that growth of young leafy vegetable of Chinese toon was somewhat accelerated in greenhouse compared to the open field. In case of apical bud growth, several parameters such as plant height, number of branch, fresh weight and chlorophyll content showed similar tendency in both greenhouse and open field. In the changes of minerals, N content in apical buds recorded significant increase to 3.1 times compared to that of later buds. Its content was 1.2 times higher in greenhouse than that of open field. Mineral contents including P, Ca, Mg and Fe were significantly increased in greenhouse. Highest ascorbic acid content was observed in lateral buds grown in greenhouse and then it was followed such as lateral bud in open field, apical bud in open field, and apical bud in greenhouse, in turn. These results indicate that greenhouse culture could be applicable to new culture in order to produce young leafy vegetable of Chinese toon with high quality.

• 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.