Relationship between Meteorological Elements and Yield of Hot Pepper in Yeosu Area of Korea

Kwon,Byung-Sun,Choi,Seong-Kyu,Shin,Jeong-Sik,Shin,Jong-Sup,Shin,Dong-Young,Hwan,Kyu-Hyun,Kim,Hak-Jin,Kuk,Yong-In,Choi,Kyong-Ju 한국자원식물학회 2003 Plant Resources Vol.6 No.1

This study was conducted to investigate the relationships between yearly variations of meteorological elements and yearly variations of productivity in hot pepper. In addition, correlation coefficients among the yields and yield components were used to find out the relationships between meteorological elements and productivity. Yearly variation of the mean air temperature in May and July showed large with coefficients of variation(C.V.) of 25.0,8.9%, respectively, but the variation of the duration of sunshine in May were relative small. Yield and plant height was greatly with C.V. of 7.14,11.6%, respectively, diameter of fruit showed more or less C.V. of 2.28% and length of fruit showed less variation. Correlation coefficients between maximum temperature in period of cultivation from May and yield are positively significant at the level of 1 %. Correlation Coefficients between precipitation in period of cultivation from May to August and yield are negative significant at the level of 5 and 1 %, respectively. Correlation coefficients amount the plant height, length of fruit, diameter of fruit per plant, and seed yield were positively significant at the level of 1 %, respectively.

고성능 유도 전동기를 위한 퍼지 속도 제어기

권병휘,全光鎬,崔秉淑,鄭雨均 홍익대학교 산업기술연구소 1997 産業技術 Vol.7 No.-

In this dissertation a novel speed control system that implements the fuzzy logic controller(FLC) is proposed. The proposed FLC used the speed error its rate of change, and the drive current as three fuzzy variables. The real command output current is chosen by the defuzzification of fuzzy output extracted from the fuzzy control rules. The flex and the torque of the induction motor are estimated using the dynamic model with an excellent dynamic response over a wide speed range and with the rotor flux field-oriented scheme of the decoupling characteristics The performance of this control system is substantiated by computer simulations.

Closing Volume "폐쇄량“ : a review

최병권,조형상 중앙대부설한국의과학연구소 1977 한국의과학 Vol.9 No.4

수혈의 부작용과 그 처치법

최병권 중앙대부설한국의과학연구소 1975 한국의과학 Vol.7 No.7

신경외과 영역에서의 호흡관리

최병권 대한신경외과학회 1982 Journal of Korean neurosurgical society Vol.11 No.4

In neurosurgical field, respiratory therapy is frequently used. So proper respiratory management is very important to maintain patient's life support and sometimes decrease intracranial pressure. In this paper, simple principles and useful methods of respiratory therapy were reviewed, and the effects of anesthetics, analgesics & sedatives were also touched on.

악성 고열증 : A Review

최병권 중앙대부설한국의과학연구소 1975 한국의과학 Vol.7 No.12

뷰캐넌의 클럽재이론에 관한 연구 : Emphasis on Pareto Optimality Condition 파레토최적조건을 중심으로

최성수,천병권 호남대학교 1997 호남대학교 학술논문집 Vol.18 No.3

Following its conclusion in Readings in Microeconomics, Professor Buchanan's seminal paper on the economic theory of clubs can now be regarded as a standard reference. The purpose of this paper is to provide an alternative analysis of the theory of clubs which, it is believed, will overcome some of the shortcomings of Buchanan's analysis. In this paper, we have to include another set of variables, the number of clubs, into our maximization ploblems. However, this is not necessary, as we can interpret a new club for same good as the consumption of a new good. It can easily be seen that our analysis is applicable even if the number of clubs exceeds one. While Buchanan's condition is satisfied only for certain numbers of individuals, the analysis of this paper is applicable to any number of individuals, whether with identical or with different tastes, and even to cases where some individuals may choose to belong to two or more clubs.

Effect of Activated Charcoal on Growth of Zingiber mioga ROSC

Choi,Seong-Kyu,Yun,Kyeong-Won,Chon,Sang-Uk,Seo,Young-Nam,Seo,Kyoung-Sun,Kwon,Byung-Sun 한국자원식물학회 2004 Plant Resources Vol.7 No.2

Activate charcoal (AC) can be utilized as a soil conditioner in agricultural crop areas. This study was conducted to investigate the effect of AC on growth and yield of Zingiber mioga ROSC as affected by different amounts of AC. The results obtained are summarized as follows. Growth characteristics including plant height and leaf length were the highest when activated charcoal added with 10-30%, suggesting that optimum amount of activated charcoal was ranged from 10 to 30%. Growth and enlargement of the root were improved by 10% AC with higher rhizome length and weight.

초·중·고 학생들의 과학 지식 성취 수준 추이 분석을 위한 종단적 연구

권재술,최병순,권치순,양일호,이경호,김지나 한국교원대학교 과학교육연구소 1999 청람과학교육연구논총 Vol.9 No.1

학생의 과학 지식 성취도에 대한 장기간의 경향성은 과학 교육 정책의 효율성을 점검하는데 매우 중요한 요인이다. 그러나 지금까지 우리 나라 학생들의 학업 성취도의 경향성을 이해해보려는 진지한 노력이 현실적으로 거의 없었다. 최근까지 한국교원대학교 과학교육연구소에서는 전국에 있는 초·중·고 학생들을 대상으로 학생들의 과학 지식 성취도를 알아보기 위한 연구를 진행시켜왔다. 연구의 첫 단계에서는 평가 문항을 개발하였다. 두 번째 단계에서는 개발된 문항을 전국적으로 투입하고 그 결과를 수집하여 2년간의 변화를 분석하는 것으로써, 이 논문은 두 번째 단계에 관한 내용을 담고있다. 이 연구에서는 권재술 등(1998)이 개발한 국가 수준의 과학 지식 평가 도구를 일부 수정하여 사용하였다. 1997년에는 전국적으로 8,766명의 학생을, 1999년에는 4,398명의 학생을 조사 대상으로 하였다. 조사 대상은 지역별, 성별 등을 고려하여 우리 나라 전체 학생의 모집단을 대표할 수 있는 표본으로 선정되었다. 연구 결과, 2년 동안 초·중·고 학생들의 과학 지식 성취 수준의 서로 다른 변화를 확인할 수 있었다. 초등학생의 경우는 성취도가 감소하였으나, 고등학생의 경우는 증가하였고 중학생의 경우는 두 시기에 의미 있는 차이가 없었다. 과학 지식 영역의 하위 영역별 분석 결과를 보면, 초등학생의 경우 개념 체계에 대한 지식 수준을 유의미하게 향상되었으나, 사실과 원리에 관한 지식 수준은 낮아졌다. 반면 고등학생의 경우는 지식 수준이 향상되었으며 특히, 사실 영역에서 크게 향상 되었다. 연구에서는 이 자료를 성별, 지역별, 행동 목표 수준 그리고 검사 문항의 상황 등으로도 나누어서 분석하였다. 한국교원대학교 과학교육연구소에서 개발한 과학 성취 수준 점검 시스템은 국가 수준에서 학생들의 과학성취도를 점검하는데 효과적인 도구가 될 것이다. The long term trend of studensts' science achievement is a very important factor to check the effectiveness of science educational policy. However, up to date no such effort to understand the trend of Korean students' science achievement has been put into action. Recently, the Science Education Center in Korea National University of Education has been attempted to collect nation wide data for students' science achievement. The first part of the effort was to develop item pools. This study was the second part to collect nation wide data and to check any change during the two year time interval. In this study, the item pools developed by Kwon et. al.(1998) were used with some modification. The data were collected two times; February 1997 and March 1999. The subjects collected nationally were 8,766 students in 1997 and were 4,398 in 1999. The subjects were collected randomly but stratified by region and sex. As the results, the trends of achievement change during the two years were different from elementary to high school. The achievement scores were decreased in elementary schools and increased in high school. In case of middle schools, the change was not significant. However, even in elementary schools the knowledge on theory was increased significantly while knowledge on facts and principles were decreased. In contrast, the knowledge on fact showed the most increase in high schools. In this study, the data were analysed in light of region, sex, behavioral objective levels(ability) and context of test items. The science achievement monitoring system developed by the Science Education Center in Korea National University of Education can be an effective tool for monitoring students' achievement on the national level.

마르에이징강의 기계적 특성에 관한 연구

최병기,최병희,권택용 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.2

Effects of Nb(Niobium) contents and solution annealing on the strength and fatigue life of 18%Ni maraging steel commonly using in aircraft. space field, nuclear energy, and vehicle etc. were investigated. Also the fatigue life stress intensity factor were compared experiment result. The more Nb content, the higher or the lower fatigue life on base metal specimens or solution annealed specimens showing that the fatigue life was almost the same. The maximum stresses of X, Y, and Z axis direction showed about 2.12x10²MPa, 4.40x10²MPa and 1.32x10²MPa respectively. The Y direction stress showed the highest because of the same direction as the loading direction. The fatigue lives showed about 7% lower FEA result than experiment result showing almost invariable error every analyzed cycle. Stress intensity factor of the FEA result was lower about 3.5~10% than that of the experiment result showing that the longer fatigue crack length, the higher error. It considered that the cause for the difference was the modeled crack tip having always the same shape and condition regardless of the crack growth.