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김병환 ( Byung Hwan Kim ) 한국개혁신학회 2012 한국개혁신학 Vol.33 No.-
본 논문은 현재 교회의 질적·양적 성장 면에서 문제가 되고 있는 한국기독교의 현실에 대한 한 대안으로서 작성된 것이다. 논문 전개의 방법으로서 먼저, 제네바에서 목회활동을 통해 한 도시 전체를 변화시켰던 칼빈의 사회봉사활동의 훌륭한 점들을 한국 기독교의 현실 속에 적용시켜보려고 시도했다. 그리고 물론 한국에서도 수많은 기독교인들의 사회봉사를 위한 단체들이 있지만, 그 중에서도 제네바에서의 칼빈의 사회봉사활동과 유사한, 가나안농군학교로 대변되는 김용기 장로의 사회봉사활동과의 비교를 통해 한국기독교 공동체의 변화를 위한, 사회변혁의 한 가지 대안을 이끌어 내고자 한다. 본 논문이 밝히고자 하는 질문들은, 먼저 칼빈은 사회봉사활동에 대해 어떤 사상을 가지고 있었는가? 그리고 칼빈은 실제로 사회봉사에 대해 어떤 구체적인 구조와 계획과 특징을 가지고 있었는가를 규명하는 것이다. 또한 칼빈의 사회개혁사상은 실제로 그 당시의 제네바의 사회생활에 어떠한 영향을 끼쳤으며, 지금의 현실에서 그와 같은 칼빈의 사상은 한국교회에 어떤 방법으로 적용될 수 있는가? 하는 것이다. 그리고 교회적인 대안의 마련을 위해 지금 한국에서 실제 봉사활동을 펼치고 있는 가나안농군학교의 활동을 칼빈의 봉사활동과 비교하여 차이점과 공통점을 분석하여 한국교회의 문제점을 파악하고, 한국교회가 사회적인 면에서 지향해야 할 목표를 설정하는 것을 그 목적으로 할 것이다. 그럼으로써 한국교회와 기독교공동체를 주축으로 사회의 인식변화를 이끌어 냄으로써, 복음을 통한 사회변화와 전체 기독교와 한국교회 성장을 위한밑거름을 삼고자 한다. This essay is written to make an alternative plan to solve the critical problems with which many korean churches are recently confronted at their quantitative, qualitative growth. First of all, I tried to apply to korean churches remarkable things of Calvin`s social service activity which had caused to change the whole city of Geneva through his pastoral activity. Needless to say, there are a lot of christian organizations for social service in Korea. But I want to induce an alternative plan for the reformation of the korean churches through the comparison of the social service activity of presbyter Kim Yong-gi at Canaan farmer`s school with that of Calvin at Geneva. The first question that this essay try to answer is what idea Calvin had in the social service activity in Geneva. Next is to find out what practical and concrete plan and project Calvin had in social service activity. And it is handled how far Calvin`s reformation ideas for social service made an influence to civil life in Geneva and how they can be applied to korean churches. The purpose of this essay is the comparison and analysis of the social service activity of Calvin in Geneva and that of Canaan farmer`s school which is developing active social service in Korea as a model of the true christian community. And it aims at the establishment of the goal that korean churches intend to in the areas of the society. I hope it causes korean churches and christian communities lead the change of the consciousness of the korean society and lay the foundation of the change of korean society and the growth of the korean church through the gospel.
반복하중상태의 철근 콘크리트 휨균열폭 예측에 관한 연구
오병환 ( Oh¸ Byung-hwan ),김세훈 ( Kim¸ Se-hoon ),김대욱 ( Kim¸ Dae-wook ),김지상 ( Kim¸ Ji-sang ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.1
Repeated loading produces a progressive deterioration of bond that may increase crack width under same stress level. Repeated loading also produces cyclic creep strain in concrete of RC beams. Cyclic creep strain of concrete in compression zone increases curvature, crack width of RC beams. this study presents expectation method of crack width in RC beams under repeated loading, this method can consider effects due to bond deterioration and cyclic creep.
안테나 소형화를 위한 Co₂ 페라이트의 마이크로파 특성
김재식(Jae-Sik Kim),최의선(Eui-Sun Choi),김강(Kang Kim),이영희(Young-Hie Lee),송성호(Sung-Ho Song),안종복(Jong-Bok Ahn),김병환(Byung-Hwan Kim),최지영(Ji-Young Choi) 대한전기학회 2011 전기학회논문지 Vol.60 No.12
The sintering behavior and microwave properties of ferrite (Ba3Co2-2xZn2xFe24O41 ceramics) were investigated for microwave applications. Also PIFA type antenna with ferrite was simulated. All samples were prepared by the solid state reaction method and sintered at 1350℃. All ceramics had relatively density above of 92% compare with theoretical density of Ba₃Co₂Fe24O41 ceramics. From the XRD pattens, the Z-type phase was existed as main phase in Ba₃Co2-2xZn2xFe24O41 ceramics. The permittivity and permeability of Ba₃Co2-2xZn2xFe24O41 ceramics were increased with Zn additions and decreased rapidly over frequency of 200~600 ㎒. Several PIFA type antennas with ferrite and FR4 were simulated. All antenna structure had return loss of less than -10 ㏈ at each resonant frequency. Simulated antenna using both ferrite and FR4 showed size reduction of 25% without a significant decrement of efficiency.
알칼리 흡수제의 탄산화반응을 이용한 고농도 CO<sub>2</sub> 포집특성
김병환 ( Byung-hwan Kim ),강필선 ( Pil-sun Kang ),유승관 ( Seung-kwan Yoo ) 한국폐기물자원순환학회(구 한국폐기물학회) 2016 한국폐기물자원순환학회지 Vol.33 No.3
Mineral carbonation is one of the safest permanent carbon dioxide sequestration methods. Carbon Capture & Utilization (CCU) is a process that utilizes available resources by removing carbon dioxide in a method of mineral carbonation. It can be applied to industries producing high carbon dioxide emissions. This study aims to investigate the absorption performance of carbon dioxide at high concentrations. Calcium hydroxide suspension was used as an absorbent. In addition, NaOH and Mg(OH)<sub>2</sub> were used as additives. Carbon dioxide removal efficiency with NaOH increased from 30% to 90% when the additive amount was increased from 1wt% to 3wt%. In the case of Mg(OH)<sub>2</sub>, carbon dioxide absorption efficiency was minimal regardless of the additive amount. In addition, the solid byproducts werec onfirmed by X-ray diffraction spectra and SEM images.
[제4분과/구조거동/재료Ⅱ] 반복하중을 받는 철근콘크리트의 부착슬립 모델
오병환(Oh Byung Hwan),김세훈(Kim Se Hoon),김지상(Kim Ji Sang) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
The crack widths of reinforced concrete flexural members are influenced by repetitive fatigue loadings. The bond stress-slip relation is necessary to estimate these crack widths realistically. The purpose of the present study is, therefore, to propose a realistic model for bond stress-slip relation under repeated loading. To this end, several series of tests were conducted to explore the bond-slip behavior under repeated loadings. Three different bond stress levels with various number of load cycles were considered in the tests. The present tests indicate that the bond strength and the slip at peak bond stress are not influenced much by repeated loading if bond failure docs not occur. However, the values of loaded slip and residual slip increase with the increase of load cycles. The bond stress after repeated loading approaches the ultimate bond stress under monotonic loading and the increase of bond stress after repeated loading becomes sharper as the number of repeated loads increases. The bond stress-slip relation after repeated loading was derived as a function of residual slip, bond stress level. and the number of load cycles. The models for slip and residual slip were also derived from the present test data.
초음파 펄스를 이용한 철근콘크리트 구조물의 균열 깊이 측정에 관한 연구
오병환 ( Oh Byung-hwan ),김지상 ( Kim Zi-sang ),김세훈 ( Kim Se-hoon ),백낙승 ( Paek Nak-seung ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.1
Ultrasonic pulse velocity method is employed for evaluation of crack depth in concrete structures. Due to the heterogeneous nature of concrete and the indirect transmission arrangement for the transit time measurement through the surface-opening cracks in concrete structures, ultrasonic pulse velocity has so many variations as crack depths and transmission length vary. In this study, ultrasonic pulse velocity method is investigated to evaluate the surface-opening crack depth of concrete slabs, reinforced concrete slabs, reinforced concrete flexural members. A resonable method is presented to detect the crack depth of concrete structures.