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동해 극전선역의 영양염류 순환과정 4 . Clorophyll a 분포 , 신생산 및 질산염의 수직확산
문창호(Chang Ho Moon),양성렬(Sung Ryull Yang),조현진(Hyun Jin Cho),이승용(Seung Yong Lee),김석윤(Seok Yun Kim) 한국수산과학회 1998 한국수산과학회지 Vol.31 No.2
A study on the biological and chemical characteristics in the middle last Sea of Korea was carried out at 31 stations in October 11∼18, 1995 on board the R/V Tam-yang. The chlorophyll a concentration, new and regenerated production, and the vertical diffusion of nitrate from the thermocline structure were investigated. From the vertical distribution of chlorophyll a, subsurface maxima were observed near the thermocline at most stations including the frontal zone, except at the southern stations where the maximum chlorophyll a concentration occurred at the surface. The nanophytoplankton was the most dominant fraction comprising 83.5% of total phytoplankton cell numbers, but netphytoplankton were common at the southern stations where the dominant species were Rhizosolenia sp. Nitrogenous new production and regenerated productions were measured using the stable isotope (15)^N nitrate and ammonia uptake method. The vertically integrated nitrogen production varied between 8.410 and 72.945 ㎎ N m^(-2) d^(-1), The f-ratio, which is the fraction of new production from primary production, waried between 0.03 and 0.72, indicating that 3% to 72% of primary production was Supported by the input of nutrients from below the euphotic zone and the rest are supported by ammonia recycled within the euphotic layer. This range of f-ratio encompasses from extremely oligotrophic to eutrophic area characteristics, The differences in productivity and f-ratio among stations were related to frontal structure and the bottom topography. The values were high near the frontal ions and low outside of it, and the station near Ulleng Island showed the highest f-ratio. Vertical diffusion coefficients were calculated from both the water column stability (Kz-1) of King and Devol`s equation (1979) and new nitrogen requirement (Kz-2), The values of Kz-2 (0.11∼0.55 ㎠/s) were relatively low compared to the valutas reported prewiously.
창의적 혁신전략 대 모방적 혁신전략의 성과효과: 상황적 관점
문창호(Chang-Ho Moon) 한국전략경영학회 2020 전략경영연구 Vol.23 No.3
본 연구의 목적은 창의적 혁신 대 모방적 혁신의 두 혁신전략 유형에 대한 기존의 연구를 기반으로 이 두 혁신전략의 개념적인 특성 및 차이에 대해 비교 논의하고 상황적 관점에 의거하여 어떠한 요인들이 모방적 혁신전략 대비 창의적 혁신전략의 성과 향상에 더 기여하는 지를 실증적으로 분석하는 데에 있다. 최근의 혁신 연구자들은 창의적 혁신전략과 모방적 혁신전략 모두 각각의 장점과 단점을 갖고 있기 때문에 두 혁신전략 유형 중 어느 한 혁신전략 유형이 본질적으로 우월하지 않다는 점을 제시한다. 따라서, 두 혁신전략 유형 간의 성과 차이를 상황적 관점에서 조사하는 것이 더 의미 있어 보인다. 기존에 혁신전략 대 모방전략 그리고 이와 비슷한 맥락에서 기술 선도자와 후발자 사이의 성과 차이에 대한 상황적 관점의 연구가 있었지만, 기존의 어떤 연구도 창의적 혁신전략 대 모방적 혁신전략의 성과차이에 대한 실증적인 연구 분석은 이루어지지 않은 것으로 보인다. 본 연구에서는 그러한 두 혁신전략유형의 성과 창출에 상대적으로 다른 영향을 미치는 상황요인으로 국제 다각화, R&D 집중도 및 조직혁신의 세 가지 요인을 채택하고 본 연구의 실증분석 목적을 달성하기 위하여 한국기업혁신조사(Korean Innovation Survey: KIS)에서 추출한 자료를 이용하였다. 실증분석 결과, 국제 다각화와 조직혁신이 각각 증가할수록 모방적 혁신전략 대비 창의적 혁신전략의 성과 기여도가 더 커지는 것으로 나타났다. 반면, R&D 집중도는 두 혁신전략 유형의 성과 차이에 영향을 미치지 않는 것으로 나타났다. 본 연구결과의 이론적 및 실무적 의미와 중요성에 대하여 논의하였다. Based on a typology of creative versus imitative innovation strategies previous researchers identified, this research examined the conceptual characteristics and differences regarding the two types of innovation strategy and empirically investigated what factors made more contribution to creative innovation strategy as compared with imitative innovation strategy from a contingency perspective. Recently innovation scholars have pointed out that since both creative and imitative innovation strategies possess their own merits and demerits, there is no inherent superiority of one of the two innovation strategies over the other. Thus, it seems to make more sense to examine the performance differences between creative and imitative innovation strategies in a contingency framework. Although there was some research focusing on the contingency aspect of performance differences between innovation and imitation strategies and in a similar vein between technological leaders and followers, to the best of the author’s knowledge, no previous research has empirically investigated the performance effects of creative versus imitative innovation strategies. This study suggested three contingency factors of international diversity, R&D intensity and organizational innovation as making a differential effect on the firm performance of those two innovation strategies. The results of empirical analysis using data from Korean Innovation Survey(KIS) showed that as international diversity and organizational innovation increased respectively, the use of creative innovation strategy made more contribution to firm performance as compared with imitative innovation strategy. On the other hand, it was found that R&D intensity did not make a differential effect on the performance of the two innovation strategies. The theoretical and practical implications for results of this research were discussed.
가솔린기관의 합성가스 배기분사 기술의 최적화에 관한 실험적 연구
문창호(Chang-Ho Moon),장익규(Ik-Kyoo Jang),박영준(Young-Joon Park),이성욱(Seang-Wock Lee),조용석(Yong-Seok Cho) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
During a cold-start period of an SI engine, fast increase in exhaust gas temperature is very crucial to improve emission due to the enhancement of catalytic performances. Synthetic gas reformed from hydrocarbon-based fuel consists of H₂, CO and N₂. Hydrogen contained in the synthetic gas is very useful species in chemical process due to its wide flammability range and fast burning speed. In this study, ESGI(Exhaust Synthetic Gas Injection) system is used to shorten the light-off time of a three-way catalyst through combustion of synthetic gas injected in exhaust manifold, during cold-start period of an SI engine. Engine control variables such as synthetic gas injection pressure, air-fuel ratio, activation time of catalyst heating function and timings of air-fuel ratio control are varied precisely using an engine management system in order to find out the tendencies of the temperature variation of the catalyst and harmful emissions. Optimized injection pressure and engine variables are suggested for the reduction in harmful exhaust emission.
문창호(Moon Chang-Ho) 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
The purpose of this study is to present and analyze the process and contents of architectural design and supervision of a house in Kunsan. The contents of study is consisted of design condition, architectural programming, architectural basic planning, and supervision of construction. The major points of the house design and supervision could be summarized as follows; searching for architectural solution from the conflicts of view and orientation, compromise and utilization of site slope, pursuit of familiar appearance and dynamic interior space, convenience of operation and maintenance, minimization of energy loss in outer wall, contract method(overhead and direct management), and regular progress meeting at site for Quality control.