• KOREAN JOURNAL OF CROP SCIENCE
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• v.65 no.1
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• pp.47-55
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• 2020

This study was conducted to evaluate the flowering characteristics of 22 soybean (Glycine max Merrill) varieties of North Korea and classify the flowering group by the flowering date. The flowering date and the days required for flowering with the different planting times on May 31, June 19, June 30, July 3, and July 4 were investigated at the agricultural experimental field of Korea University for three years from 2017 to 2019. The flowering date and the days for flowering of "Yeonpungkong", an early maturing soybean cultivar of Korea, were July 18 and 48 days, respectively, at the planting time of May 31, those of "Daewonkong", a mid-late maturing cultivar, were July 30 and 60 days, respectively. Based on the flowering dates of "Yeonpungkong" and "Daewonkong", North Korean soybean varieties were classified into six flowering groups. Eight North Korean soybean varieties had the flowering dates earlier than "Yeonpungkong", including "Brekkhat" classified into the early flowering group. The range of flowering date was July 2 to 15 at planting time of May 31. Twelve North Korean soybean varieties had flowering dates similar to or later than "Daewonkong", including "Chang Dan Bac Mok" classified into the mid-late flowering group. The range of flowering date was July 24 to 30 at the planting time of May 31. For flowering response to environmental stimulus, all of the mid-late flowering varieties of North Korea responded to "photosensitive or day-length" for flowering reaction. The early flowering varieties were divided by "photosensitive" response and "temperature" response variety.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.07a
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• pp.226-227
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• 2015

본 논문에서는 개화기 소설과 신문사설에 나타난 담화방식을 연구한 것이다. 개화기 소설과 신문 사설은 당시 대표적인 담론 매체였다. 대중들에게 쉽게 전달할 수 있는 담화방식은 개화기소설의 경우 대화체 토론체 연설체 담화방식으로 나타났다. 이는 신문 사설이 갖고 있는 한계인 설명 추상보다 진일보한 것으로 당대의 시대정신을 잘 구현한 것으로 볼 수 있다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.25 no.3
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• pp.9-14
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• 1980

This experiment was carried out to examine the effect of water stress at anthesis on the grain maturation and to interpret the immediate and resulting growth response in barley. The dry weight of root, stem, internode, flag leaf and grain under water stress was remarkably more reduced than that under no-water stress, respectively. Water stressed plants had heavier grain dry weight during 7.14 days after water stress than that under no-water stress, but this early response was reversed significantly in the later period. The relative turgidity of organs except grain under water stress was severely lowered than that under no-water stress. The net photosynthsis by rewatering after water stress had been kept at the lower level than that under no-water stress ti1l the late maturation.

• Korean Journal of Agricultural and Forest Meteorology
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• v.14 no.4
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• pp.189-195
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• 2012

To predict the blooming date of 'Yumyeong' peach trees, the models for flower bud developmental rate (DVR) were constructed. The DVRs were calculated from the demanded times at controlled air temperatures. The branches of 'Yumyeong' peach trees were incubated at three different temperatures of 9.7, 15.2, and $18.9^{\circ}C$. The DVRs were also constructed with blooming dates and air temperatures in the field, collected from 1979 to 2008 at the experimental orchard of National Institute of Horticultural and Herbal Science, Suwon, Korea. All the DVRs increased linearly or exponentially with air temperature. The DVR equations evaluated under controlled air temperatures were y=0.0018x+0.0051 and y=$0.0125e^{0.0603x}$. The DVR equations under field conditions were calculated as y=0.0039x-0.0112 and y=$0.0062e^{0.1512x}$. These DVR equations offer developmental indices and predict the date for blooming with air temperature data. These DVR equations were validated against the blooming data observed in the field. When the blooming dates were calculated with exponential DVR equations and daily air temperature data, the root mean squared errors between the observed and predicted dates were around 2 days. These results suggest that the DVR models are useful to predict the blooming date of 'Yumyeong' peach trees.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.25 no.4
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• pp.86-90
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• 1980

To define the effect of planting time on the flowering of the peanut varieties, Cheonyup banlip and 9 other varieties were planted seven times at 15 day interval from April 15. The days to flowering of all peanut varieties were shortened proportionately with delayed planting time. The significant negative correlation (r =-0.86**) was recognized between the shortening rate of the days to flowering by later planting time and the days to flowering of peanuts planted at standard seeding time. The short day treatment did not have any effect on the chance of the days to flowering of each variety. A significant negative correlation was recognized between the number of flowers and the days to flowering of the peanut varieties planted at standard seeding time.

• Communications of Mathematical Education
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• v.20 no.2 s.26
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• pp.207-214
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• 2006

Mathematics can be divided into practical mathematics and logical mathematics. The 'Enlightenment Period' is the period in which our mathematics shifted from practical mathematics to logical mathematics. Considering the change of our school mathematics and mathematics education in the enlightenment period, we reach the following conclusions. First, the contents and forms of mathematics books followed to Western style, but the attitudes adhered to on. Second, making much of results than process, we are afraid of proof. Third, we necessitate the mathematics culture of enjoying itself.

• Journal of Climate Change Research
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• v.3 no.3
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• pp.161-181
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• 2012

The Enlightenment period (1876~1910) of Joseon was the age of turbulence in terms of introduction of the Western science and technology. The interaction of modern and oriental science in the enlightenment period can be got insights from the records of Westerners. This study especially focuses to the viewpoints of Western visitors toward the weather and climate of the Korean peninsula. As a result, there are three characteristics in Westerners' awareness of Korean climate: quantitative records using numeric; interpretation of weather in the system of the modern science; and the distinct records about rainfall. In conclusion, from these result, it can be suggested that the Western visitors systematically grasped the climate of Korean peninsula.

• The Korea Beekeeping Bulletin
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• s.330
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• pp.61-61
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• 2008

본 협회에서는 농촌진흥청과 협조하여 도 기술원, 시.군 농업 기술센터에 행정 지시하여 과수농가 봄철 사과, 배 개화기에 맹독성농약사용을 금지하도록 협조 요청했다.

• Journal of the Korean Chemical Society
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• v.48 no.4
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• pp.427-435
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• 2004

Characteristics of chemistry education during the enlightenment period in Korea are examined by analyzing chemistry textbooks used in the period. Specifically, the analysis is made from the aspects of science, students and teachers. As a result it is found that; first, scientific knowledge itself is emphasized, contrary to those described in the curriculum of chemistry used in the period, and it consists of introduction, non-metals, metals and organic chemistry in chemistry textbook, second, the level of chemistry is similar with that in present high schools, and its technical constitution might have been difficult for a student to study with an experiment, third, terminology lacks consistency and some textbooks include contents of other subject. It is therefore believed that the chemistry textbooks of the enlightenment period is scientifically incomplete and would not have been easy for the teachers to use them to teach the students. In addition, considering the students as a beginner of modern sciences, study level could have been too difficult for them to follow. In conclusion, it appears that chemistry education during the enlightenment period in Korea was not so successful.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2021.04a
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• pp.42-42
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• 2021

산채류 종자는 주로 농가의 자가 채종으로 생산되고 있다. 농가에서는 종자만을 생산하기 위해서 산채를 재배하지 않으며, 대체로 산채를 수확한 후 채종하는 실정이다. 하지만 종자생산을 위해서 생채나 나물을 언제까지 수확해야 하는지에 대한 한계기 설정이 불분명하다. 따라서 전북농업기술원 허브산채시험장에서는 개미취와 섬쑥부쟁이는 5년생, 곤달비는 3년생 묘목을 이용하여 종자생산을 위한 적정 생채수확 한계기를 설정하고자 시험을 실시하였다. 55% 차광막을 설치한 노지 재배포장에서 생채 수확 한계기를 각각 2020년 4월, 5월, 6월까지로 두어 한계기별 생채 수량, 상품 수량 및 상품율과 개화 시기, 개화율 및 결실률 등을 조사하였다. 개미취의 생채 상품율은 수확 한계기가 늦어질수록 다소 떨어지는 경향이었으며, 개화 시기는 무처리와 4월까지 수확은 동일하였으나, 5월, 6월까지는 수확 한계기가 늦어질수록 지연되었다. 개화율은 대부분 10% 미만이었으며, 5월과 6월까지 생채를 수확한 경우는 추대 및 개화가 거의 되지 않았다. 섬쑥부쟁이는 생채를 6월까지 수확하면 4월까지 수확한 경우보다 약 2배 이상의 생채를 얻을 수 있으나 상품율은 확연히 떨어졌다. 개화 시작은 무처리와 4월까지 수확이 타 처리에 비해 빨랐으나 개화종은 시기에 상관없이 비슷하였다. 또 4월까지 생채를 수확한 경우 무처리보다 개화율, 결실률이 더 높았다. 5월 이후 수확은 생육 부진으로 이어져 개화 및 결실률이 매우 떨어졌다. 곤달비는 개미취와 섬쑥부쟁이에 비해 생채 수확 한계기가 늦어질수록 상품 수량이 눈에 띄게 증가하였으며, 처리 간 추대 시기도 차이는 없었다. 개화율은 5월 수확 이후 낮아졌으며, 결실률은 6월 이후에 급격히 떨어졌다. 따라서 채종을 위해서는 차광재배 시 개미취와 섬쑥부쟁이는 생채 수확시기를 4월 하순, 곤달비는 5월 하순까지로 한정해야 할 것으로 판단된다.