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홍순경 대한전기협회 1993 대한전기협회지 Vol.- No.202
전력계통의 분석은 첫 번째로 특수조건하에서 기존 또는 계획된 전력계통의 성능을 예측 하거나 개선하는데 사용되는 기술로서, 이 기술을 산업체의 전력계통에 적용할 때 안정성, 신뢰성, 고품질의 전력 그리고 초기투자와 운전비의 절감과 같은 전력계통 설계의 목적을 달성 하는데 크게 공헌하게 된다. 산업체의 전력계통 분석은 주로 단락사고, 보호설비의 협조, 전력조류, 전동기의 기동, 접지, 과도적 과전압, 역률개선, 기타의 설계 등을 위한 계산이 포함된다. 전력계통 분석은 전력계통을 신설 또는 개조할 때는 물론이고 기존시설의 부하나 용량이 현저하게 변경되었을 때 또는 기존시설의 고장을 진단할 때에 반드시 실행되어야한다.
홍창수(CS Hong),황순경(SK Whang),이정기(JG Rhee),정구명(KM Chung) 대한산부인과학회 1969 Obstetrics & Gynecology Science Vol.12 No.4
Since Brenner`s original description in 1907, much information on Brenner tumor of the ovary has been recorded such as a grooss and microscopic pathology. But three aspects of this tumor re,mains unsettled, the histogenesis, the possibility of estrogen production and their potential for malignancy. We reviewed a literatues on the Brenner tumor with a case of postmenopausal patient.
최병순,홍순경 한국과학교육학회 1991 한국과학교육학회지 Vol.11 No.1
The purpose of this study was to investigate the effectiveness of Learning Cycle approach to change the concept of density. The results of the study were as follows; 1) Students already had various types of preconception related to density before formal learning. These preconceptions mostly differ from scientific concepts. 2) Male students were much better than female ones in the development of scientific concepts before formal learning. These differences were found statistically significant(P<0.01). 3) The higher the cognitive level of the students, the better the development of scientific concepts. 4) In the change of preconceptions to scientific concepts by treatment, there was significant difference between control group and experimental group at the 0.05 level. It was found that Learning Cycle approaches were more effective than traditional approaches in aquiring the concept of density. 5) It was found that there was no significant difference on the retention level of the concept of density between control group and experimental group.
최병순,홍순경 한국교원대학교 과학교육연구소 1991 청람과학교육연구논총 Vol.1 No.1
The purpose of this study was to investigate the effectiveness of Learning Cycle approach to change the concept of density. The results of the study were as follows: 1) Students already had various types of preconception related to density before formal learning. These preconceptions mostly differ from scientific concepts. 2) Male students were much better than female ones in the development of scientific concepts before formal learning. These differences were found statistically significant(P<0.01). 3) The higher the cognitive level of the students, the better the development of scientific concepts. 4) In the change of preconceptions to scientific concepts by treatment, there was significant difference between control group and experimental group at the 0.05 level. It was found that Learning Cycle approaches were more effective than traditional approaches in acquiring the concept of density. 5) It was found that there was no significant difference on the retention level of the concept of density between control group and experimental group.