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      • KCI등재

        해외재난 위기시 구호지원활동의 성공요인에 관한 연구

        양철호(Chul Ho Yang)(楊澈鎬),박효선(Hyo Sun Park)(朴孝善) 위기관리 이론과 실천 2013 Crisisonomy Vol.9 No.9

        최근에 아이티, 일본, 터키, 중국의 대지진은 많은 사상자와 더불어 엄청난 재산 피해를 발생시켜, 국제사회에서는 이들 국가에 구조팀을 파병하고 의료품, 식량 같은 구호물자를 지원 하는 등 피해복구 및 재건을 위한 공동의 노력을 전개하였다. 대한민국에서도 아이티 대지진시 UN 안보리 결의안에 따라 재건지원단(단비부대)을 파병하여 도로ㆍ건물 피해복구, 의료지원, 급수지원 등 공공시설 복구 및 주민 재건을 적극 지원하였다. 이 연구는 아이티 대지진시 재건지원단을 파병하여 피해복구 및 재건지원을 한 사례를 분석 성공요인을 도출하여 향후 대규모국제적 재해ㆍ재난으로 인한 해외파병 정책업무에 기여하는데 목적이 있다. 이를 위해 2010년 2월 6일부터 12월 31일까지 파병된 아이티 재건지원단 1,2진의 활동사례를 재건지원단 해외파병 성공요인 분석 틀(METT+TC)을 활용하여 분석하였다. 분석결과 아이티 재건지원단은 대한민국 최초 외국의 대규모 재해ㆍ재난지역에 대한 국제적 파병이었으며, 그 임무를 성공적으로 완수하였다. 성공요인은 첫째, 파병에 대한 정부ㆍ국회의 신속한 의사결정과 파병부대의 현지 상황과 특성에 맞는 통합적 지원이었다. 둘째는 현지 여건과 주민들의 성향을 고려한 효과적인 민사작전의 전개였다. 셋째는 현지에 파병되어온 외국군과의 다양한 교류활동과 협력이었다. 그러나 파병 후 조기 임무수행을 위한 사전 충분한 준비, 현지의 특성에 맞는 인력과 장비의 편성 등의 보완이 요구되었다. 따라서 아이티 재건지원단의 사례를 토대로 추가 발전시킨다면, 외국의 대규모 재해ㆍ재난 위기 발생시 성공적인 임무수행이 가능할 것이라 판단된다. Recent earthquake in Haiti, Japan, Turkey, and China, caused a huge property damage and the number of casualties. International community developed the joint efforts to support for disaster recovery and reconstruction including dispatching rescue teams, and sending relief supplies such as medical supplies, and food. According to the UN Security Council Resolution, the Republic of Korea dispatched the reconstruction support group, Danbi, to support both public recovery and civil reconstruction including road and building restoration, medical and water supply support. This study is aimed to contribute to the support services of overseas dispatch by analyzing the case and deriving the success factors of Danbi. For this, activities of the first and second Danbi from Feb 6 to Dec 31 in 2010, were analyzed by using frameworks for success factors of overseas dispatch(METT+TC). As a result of the analysis, Haiti reconstruction support group(Danbi) was Republic of Korea's first international dispatch for large-scale disaster and the mission was successfully accomplished. The first success factor was a rapid decision of the government and Congress, and the integrated supports according to the characteristics of the local situation. Second was the development of effective civil operations which considered the conditions of the local residents and the tendency. Third was a wide range of exchanges and cooperations with dispatched foreign troops. However, sufficient preparation for early missions and formation of personnel and equipment based on the local characteristics were required. Thus, if additional improvements are made based on the case of Haiti reconstruction support group, Danbi, it is considered that the successful mission could afford when foreign large-scale disaster occurs.

      • KCI등재SCOPUS

        엔진 실린더헤드 강건 설계 방안

        양철호(Chullho Yang),한문식(Moonsik Han) 한국자동차공학회 2011 한국 자동차공학회논문집 Vol.19 No.6

        Maintaining adequate sealing in engine cylinder head is a crucial factor in engine design. Failure of engine operations occurs mainly owing to the leaking by decreased sealing pressure. Reliability-robustness concept is applied to the engine cylinder head system. Deterministic way to obtain engineering solution in CAE industry may not consider the effects of noises and disturbances experienced during operation. However, analytical reliability-robustness concept may make possible to reduce the sensitivity of system with noise factors. Influences of design factors including noise factors would be predicted in analytical way. Optimized design may be obtained by shrinking variability and shifting to design target. Three-dimensional finite element analyses have been performed to apply analytical reliability-robustness concept.

      • KCI등재SCOPUS

        설계인자변화에 따른 엔진 벌크헤드 내구성 향상

        양철호(Chullho Yang),한문식(Moonsik Han) 한국자동차공학회 2011 한국 자동차공학회논문집 Vol.19 No.2

        Three-dimensional finite element analyses have been performed to improve the durability of bulkhead. To keep pace with design changes and concentrate on regions of interest, SUBMODEL technique in ABAQUS was used for analysis. An analysis was conducted with following load cases: 1) Cap press-fit, 2) Bearing crush, 3) Bolt assembly, 4) Hot assembly, 5) Firing load, 6) Alternating firing load, 7) 2nd hot assembly. Fatigue analysis was done using commercial software FEMFAT and fatigue factors at the interested regions such as bolt tip area, counter bore, breathing hole, honing clearance were calculated and compared to aid design validation. Finite element modeling in the area of thread engagement used a simple constraint equations. Increasing bolt length, to a minimum of 39 mm above joint face gives a better fatigue resistance to the bulkhead. Breathing hole helps not only circulate the air in the crankcase but also fatigue resistance of bulkhead by relieving the stress at the critical locations.

      • KCI등재SCOPUS

        정상유동 장치에서 유동 특성 평가 방법에 대한 연구(6)

        양철호(Cheolho Yang),엄인용(Inyong Ohm) 한국자동차공학회 2018 한국 자동차공학회논문집 Vol.26 No.2

        In the previous studies, the assumption of the solid rotation, the velocity profiles, the evaluation position, and the eccentricities were discussed. In addition, the swirl coefficient and swirl ratio were assessed and compared via measurement of the conventional impulse swirl meter(ISM) and calculation based on the velocity by particle image velocimetry(PIV) from 1.75B position, which was 1.75 times bore position apart from the cylinder head, to the 6.00B position. In this study, the influence of the axial flow on the flow evaluation was examined from 1.75B position to the 6.00B position in order to check the constant axial velocity assumption. For this purpose, the evaluation was performed under the assumption that the axial velocity is proportional to the tangential velocity, and the results were compared with the previous ones. The results showed that the influence of the axial velocity was larger than the effect of the evaluation center setting. Also, the swirl coefficient increased because the increase in momentum around the cylinder wall was much larger than the decrease of the one around the evaluation center when the axial velocity was considered. Furthermore, the tangential and axial velocity distributions were quite similar, but there was also a backflow by recirculation in the axial direction, thereby distorting the measured values. On the other hand, when the momentum was conserved, the swirl coefficient measured by the ISM changed according to the measurement plane position due to the momentum conversion caused by the flow structure change. In the ISM evaluation before 5B, the effects of the change of the flow structure and the backflow were significant. After 5B, the effect of friction increased because the structural change was reduced by the flow development. Finally, despite the angle of attack variation due to the flow progression, its effect was not observed because the influences of tangential and axial flows were offset against each other, and the evaluation value increased as the structure of the flow gradually turned to the ideal form in the evaluation of the PIV.

      • KCI등재
      • KCI등재후보

        동특성 시뮬레이션을 이용한 공기, 지열 및 지하 저수조 열원 소형 열펌프의 경제성 분석

        양철호(Chul-Ho Yang),김영일(Youngil Kim),정광섭(Kwang-Seop Chung) 한국지열·수열에너지학회 2012 한국지열에너지학회논문집 Vol.8 No.4

        Due to reinforcement of international environment regulation and high oil prices, interest in renewable energy is growing. Countries participating in UNFCCC are continuously putting efforts in reducing greenhouse gas after enforcing Kyoto Protocol into effect on Feb, 2005. Energy used in buildings, which relies heavily on fossil fuel accounts for about 24% of total energy consumption. In this study, air, geothermal and water source heat pump systems for an 322 ㎡ auditorium in an office building is simulated using TRNSYS version 17 for comparing energy consumptions. The results show that energy consumptions of air, geothermal and water source heat pumps are 14, 485, 10,249, and 10,405 kWh, respectively. Annual equal payments which consider both initial and running costs become 5, 734, 521, 6, 403,257 and 5,596,058 Won. Thus, water source heat pump is the best economical choice.

      • KCI등재

        레바논 파병 동명부대의 국제평화유지활동 성공요인에 관한 연구

        양철호(Yang, Cheol-Ho) 국방부 군사편찬연구소 2016 군사 Vol.- No.101

        Most domestic researches for the performance evaluation of ROK Forces’ Peace-Keeping operations are used qualitative evaluation method and have suggested policy alternatives in normative level, and there are no researches by conceptual framework for success factors in Peace-Keeping operations. Therefore, The study analyze the successful factors on Peace-Keeping operations of the Dong-Myung Unit in lebanon by METT+TC framework. The success factor indexes suggested by METT+TC framework in this study is ideal type or prototype. Thus each performance evaluation of Peace-Keeping operations should select main factors in METT+TC success factors and apply performance evaluation of Peace-Keeping operations. In this context, analysis and evaluation for Peace-Keeping operations of the Dono-Myung Unit in lebanon also select 21 main indexes among 36 indexes, and discuss ‘success’ or ‘failure’ for main success factors on the basis of detailed fact sheets. This study is the first and tentative attempt for the evaluation performance of Peace-Keeping operations of ROK Forces by MRTT+TC framework. Detailed fact sheet is suggested to analyze whether success or failure of main success factors, it is not settled the criteria for judging success or failure. It can not be denied to be included subjective view in a heuristic dimension.

      • 지하 저수조 미활용 에너지를 이용한 소형 수열원 히트펌프의 경제성 분석

        양철호(Chul-Ho Yang),김영일(Youngil Kim),정광섭(Kwang-Seop Chung) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.6

        Due to reinforcement of international environment regulation and high oil prices, interest in renewable energy is growing. Countries participating in UNFCCC are continuously putting efforts in reducing greenhouse gas after enforcing Kyoto Protocol into effect on Feb., 2005. Energy used in buildings, which relies heavily on fossil fuel accounts for about 24% of total energy consumption. In this study, air, geothermal and water source heat pump systems for an office building is simulated using TRNSYS version 17 for comparing energy consumption. The results show that energy consumptions of air, geothermal and water source heat pumps are 14,485, 10,249, and 10,405 kWh, respectively. Annual equal payments which consider both initial and running costs become 76,383,037, 80,864,689 and 75,246,579 Won. Thus, water source heat pump is the best economical choice.

      • KCI등재SCOPUS

        베어링 캡 유한 요소 해석 설계 방법

        양철호(Chullho Yang),한문식(Moonsik Han) 한국자동차공학회 2009 한국 자동차공학회논문집 Vol.17 No.1

        Main bearing cap is one of the essential structural elements in internal combustion engine. Main bearing cap guides and holds the crankshaft, withstanding the full combustion and inertia loads of the engine. A seamless design methodology using FEA has been proposed to produce a reliable design of main bearing cap. A Levy’s thick cylinder model was applied to calculate the contact pressure between bearing shell and housing bore. A calculated contact pressure at housing bore is within the allowed limit comparing with that from bearing shell model. An adequate FEA model was suggested to obtain reliable solutions for the durability of main bearing cap. 3D global model consists of engine bulkhead, main bearing cap, and bolts. Sub­model consisting of cap and part of bolts is used to get detailed solution of main bearing cap. A very careful contact modeling practice is needed to resolve the convergence problems frequently encountering during combined geometric and material non­linear problems. A proposed methodology has been applied to the main bearing cap model successfully and obtained reliable stress results and fatigue safety factors.

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