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고등학교의 시설 및 교원조직 운영 실태: 공학과 별학 간의 비교
권오남,곽삼근,임 형,허라금 이화여자대학교 사범대학 교과교육연구소 2001 교과교육학연구 Vol.5 No.2
남녀공학 교육형태가 세계적으로 확산되는 추세 속에서 우리 나라 공학 교육은 실질적인 양성 평등교육에 대한 충분한 사전 준비 없이 확대·시행되고 있다. 이러한 상황에서 공학교육의 실태와 문제점을 양성평등의 실현이라는 차원에서 분석해 보고자 한다. 성별 학교 유형에 따른 학교 운영상의 차이점을 파악하기 위해 남녀공학, 여학교, 남학교의 학교 운영 실태 및 시설현황을 분석해 본다. 연구 방법은 서울, 대구, 경기, 전북, 제주의 일반계 고등학교를 대상으로 1·2차의 수정작업을 거쳐 개발된 설문지를 사용하여 연구를 수행하였다. 연구 결과에 따르면, 의사결정직의 구조에서 상위직의 여성의 비율이 남녀 공학과 남학교에 비해 여학교의 경우에 상대적으로 높게 나타나고 있으며, 계열별 주요 교과 교사의 성별 분포에서는 인문계 교과에서 여교사 비율이 높게 나타나고 있음을 알 수 있었다. 이러한 인문계 영역의 여성의 편중 현상은 인문계 계통의 대학에 여학생의 진학 비율이 높게 나타나고 있는 데에서도 보여지고 있다. 또한 연구결과를 살펴보면, 교복 착용이나 교훈 등에서 여학생의 활동을 제약하는 요소들을 내재하고 있는 것으로 밝혀졌고, 시설물도 부족하게 제공받고 있음을 볼 수 있었다. 학교의 운영체계는 학생들에게 역학 모델로서 큰 영향이 미칠 수 있다. This study attempted to compare co-educational and single-sex Korean high schools in terms of their facilities for each gender and organization of teachers for decision-making processes. The subjects of this study were 43 high schools in Seoul, Daegu, Kyonggi, Chonbuck, and Cheju areas. Data were collected by the questionnaire which includes questions on gender distribution of teachers for decision making processes, educational golas, school facilities for each gender, and others. The percentage of male teachers involving decision-making processes was higher than that of females teachers in both co-educational high schools and single-sex high schools. Further, this study revealed that girls were lacking for school facilities such as playground, toilets. This study suggested that teachers, educators, policy makers should aware of these facts in order to achieve gender equity and equality in high schools.
서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)
김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2
Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.
Kwon, Boseong,Park, Jun-Hwan,Jang, Seong-Cheol,Oh, Seong-Geun Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.12
Alumina particles were grafted onto the surface of manganese oxide particles via the coprecipitation process using surfactant and cosurfactant. The phase of Mn/Al salts (Phase I) and the phase of precipitation agent (Phase II) were prepared in aqueous surfactant solution, separately. Phase II was added into Phase I and the reaction was performed to form the precursors of composites through hydrogen bonding between $Mn(OH)_2$ and $Al(OH)_3$ prepared by the reaction of Mn/Al salts with the precipitation agent. The alumina-grafted manganese oxide particles were obtained as a final product after calcination. The concentrations of Al salt and surfactant were varied to investigate their effects on the formation and the crystallinity of composites. In addition, the crystal structure of products could be controlled by changing the calcination temperature. Through thermal analyses, it was found that the thermal stability of manganese oxide was improved by the introduction of alumina on its surface.
H<sub>2</sub>O/LiBr+HO(CH<sub>2</sub>)<sub>3</sub>OH계 공냉형 이중효용 흡수식 냉방시스템의 사이클 해석
권오경,문춘근,윤정인,Kwon, Oh-Kyung,Moon, Choon-Geun,Yoon, Jung-In 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.2
A cycle analysis was achieved to predict the characteristics by comprehensive modeling and simulation of an air-cooled, double-effect absorption system using a new $H_2O/LiBr+HO(CH_2)_3OH$ solution. The simulation results showed that the new working fluid may provide the crystallization limit 8% higher than the conventional $H_2O/LiBr$ solution. With a crystallization margin of 3wt%(weight%), the optimal solution distribution ratio was found in the range of 36 to 40%. Variation of cooling air Inlet temperature has a sensitive effect on the cooling COP and corrosion problem. The simulation of heat exchangers with UA value revealed that the absorber and the evaporator are relatively important for an air-cooled system compared with the condenser and the low temperature generator. The effect of cooling air flow rate, circulation weak solution flow rate and chilled water inlet temperature were also examined. The new working fluid may provide the COP approximately 5% higher than the conventional $H_2O/LiBr$ solution.
과도안정도와 미소신호안정도 관점에서 국내 전력계통의 임계관성계수 평가
백종오(Jong-Oh Baek),정인주(In-Joo Jeong),하정민(Jung-Min Ha),맹창엽(Chang-Yeop Maeng),권오근(Oh-Geun Kwon),이배근(Bae-Geun Lee),김수배(Soobae Kim) 대한전기학회 2019 전기학회논문지 Vol.68 No.9
The increase of inverter-based renewable energy sources reduces inertia constant of power systems and the loss of the system inertia may cause power system stability problems. To ensure a secure energy delivery system, these problems should be analyzed thoroughly from various perspectives about power system stability. This paper presents the estimation of the critical inertia of Korean power systems, which is the minimum amount of inertia required to maintain power system dynamic securities. The estimation has been made by gradually reducing the system inertia of Korean power systems and then by analyzing the change of dynamic securities in terms of transient and small signal stabilities. In the transient stability aspect, the decrease of critical clearing time(CCT) has been analyzed with four different reduced inertial models of Korean power systems. With the small signal stability perspective, the change of the system damping ratio has been studied. Based on the results from the stability studies, the critical inertia has been determined and it can be considered as the indirect limit of renewable energy shares in Korean power systems.
Kwon, Hyunah,Ham, Juyoung,Kim, Dong Yeong,Oh, Seung Jae,Lee, Subin,Oh, Sang Ho,Schubert, E. Fred,Lim, Kyung-Geun,Lee, Tae-Woo,Kim, Sungjun,Lee, Jong-Lam,Kim, Jong Kyu Wiley Blackwell (John Wiley Sons) 2014 ADVANCED ENERGY MATERIALS Vol.4 No.7
<P>A three-dimensional indium tin oxide (ITO) nanohelix (NH) array is presented as a multifunctional electrode for bulk heterojunction organic solar cells for simultaneously improving light absorption and charge transport from the active region to the anode. It is shown that the ITO NH array, which is easily fabricated using an oblique-angle-deposition technique, acts as an effective antireflection coating as well as a light-scattering layer, resulting in much enhanced light harvesting. Furthermore, the larger interfacial area between the electrode and the active layer, together with the enhanced carrier mobility through highly conductive ITO NH facilitate transport and collection of charge carriers. The optical and electrical improvements enabled by the ITO NH electrode result in a 10% increase in short-circuit current density and power-conversion efficiency of the solar cells.</P>
A case of right sided aortic arch with atrial septal defect
( Geun Jin Ha ),( Myeung Joon Sung ),( Jung Hyeun Kim ),( Jin Wook Jung ),( So Yeon Kim ),( Jin Bae Lee ),( Jae Kean Ryu ),( Sub Lee ),( Ji Young Choi ),( Oh Chun Kwon ),( Kee Sik Kim ),( Sung Gug Cha 대한내과학회 2009 대한내과학회 추계학술발표논문집 Vol.2009 No.-