• Proceedings of the KIEE Conference
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• 1998.11a
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• pp.31-33
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• 1998

The sensitivity of induction watthour meter was reviewed by characteristic tests under the effects of each input harmonics and the variation of power factor of inverter input/output terminal. This paper presents experimental data on the characteristics of induction watthour meter under the effect of harmonics.

• Proceedings of the KIPE Conference
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• 2016.11a
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• pp.176-177
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• 2016

본 논문에서는 효율적인 배터리 팩 설계를 위해 300개의 18650 리튬이온 셀의 전기적 특성을 비교분석하였고 통계적 분석을 기반으로 스크리닝 기법을 적용하였다. 300개의 고출력 원통형 18650 리튬이온 배터리 셀을 사용하여 전류적산법 기반 방전 용량(discharged capacity)과 HPPC(hybrid pulse power Characterization) test 기반 충전저항과 방전저항을 추출하였다. 추출한 파라미터를 바탕으로 통계적 분석을 수행하고 스크리닝 기법을 적용하였다. 스크리닝 기법을 적용한 셀과 랜덤으로 추출된 셀을 비교 및 분석하였다.

• 한국약용작물학회:학술대회논문집
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• 2009.05a
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• pp.135-136
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• 2009

• 한국약용작물학회:학술대회논문집
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• 2009.05a
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• pp.139-140
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• 2009

• Proceedings of the Korean Society of Crop Science Conference
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• 2018.10a
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• pp.58-58
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• 2018

• Journal of the Korean Recycled Construction Resources Institute
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• v.6 no.4
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• pp.127-133
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• 2012

In this paper, tests were carried out to monitor the effect of the curing temperature on autogenous shrinkage of the high strength cement mortar incorporating silica fume, blast furnace slag and fly ash ranged from 10%~30% by mass of cement. The curing temperatures were varied from $5^{\circ}C$ to $35^{\circ}C$, respectively. According to results, the setting time exhibited to delay with increase of admixture and drop of temperature. As for the effect of curing temperature on autogenous shrinkage, the increase of SF and BS resulted in an increase of autogenous shrinkage, while the use of FA decrease. The higher the curing temperature is, the greater the autogenous shrinkage is. This is due to the accelerated hydration rate of cement. It is found that the maturity does not consider the effect of curing temperature on autogenous shrinkage.

• Journal of Bio-Environment Control
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• v.7 no.2
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• pp.144-150
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• 1998

It was studied about the effects of irrigation schedules by integrated solar radiation on fruit sweetness of cherry tomato in perlite and polyurethane(PUR) culture. In PUR culture. the brix % was decreased with frequent irrigation and their differences were increased as high as the cluster. The brix % in PUR culture was higher than in perlite culture and their differences were large in proportion as the Plant grew when the Percentage of drainage was 25%. The a＊ value, expressing red color. was not affected by irrigation schedules when the medium was PUR. On the other hand, the value of a＊ in PUR was higher than that in perlite. and its tendency was large as high as the cluster. The fresh weight of fruit was higher in perlite culture than in PUR culture. From this study it Is recommended that the percentage of drainage is maintained to 25% in PUR culture in view of Productivity and quality of fruits.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.423-426
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• 2002

The foundation for developing a cost estimation system based on historical data has been being prepared in Korea. Historical data is a priori of developing a cost estimation model. Cost Index, one of the historical data, is used to estimate construction cost and to adjust the amount of contract money in the foreign country, whereas it is not used in domestic except for the road construction project in Korea. Construction cost indices can be used by an estimator in tender analysis, pricing, price adjustment, cost planning, and forecasting. In this regards, this paper identified the problems in developing Cost Index evaluation process by comparing the standard of framing Cost Index used in British to the one used in Korea. Then, the scheme for improving a Cost Index required for Site Developing Construction was proposed. Twenty-two cases of engineering estimate data were used to compare the domestic standard to the foreign one in deriving a Cost Index.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.35 no.6
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• pp.481-486
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• 1990

A survey was carried out on the cold-induced sterility of paddy rice in 1988 in the alpine area of Kangweon province when cold spell occurred during late July to early August, During this period minimum temperature as low as 8.5$^{\circ}C$ and 5.7$^{\circ}C$ was recorded at Dunnae and Jinbu, respectively. The rice cultivars, which encountered this cold spe]J at meiotic stage of microspore, were damaged by sterility in most alpine areas of higher than 300m in altitude. To secure spilkelet fertility higher than 80% it was estimated that the minimum and average air temperature accumulated during 13 days of meiotic stage should be higher than 2$25^{\circ}C$ and 285$^{\circ}C$, respectively and/or the duration of lower than 17$^{\circ}C$ in minimum temperature should not exceed fivedays during that period.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.47 no.3
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• pp.254-258
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• 2002

The characteristics of yield and quality in 3 rice varieties according to harvest time of 40, 50, 60 and 70days after heading(DAH) was investigated to obtain basic information for the production of high quality rice. The protein content of milled rice increased significantly as increase the ripening period from 40 to 70DAH. The palatability value measured by rice taster was the highest in ripening period of 40DAH and decreased with increase of ripening period. The optimum time for harvest in terms of both rice yield and quality was 4050DAH in Daejinbyeo, and 4060DAH in Seojinbyeo and Chucheongbyeo, however, it was considered to be 4050DAH only for rice quality. The palatability value measured by rice taster showed a highly negative correlation with protein content of milled rice(1=-0.94$^{**}$) and cumulative ripening temperature(r=-0.79$^{**}$).