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개구부가 있는 밀폐공간내 화재의 복합열전달 및 연소가스 분석에 관한 연구
박찬국,추병길,김철 (社團法人)韓國火災·消防學會 1997 한국화재소방학회논문지 Vol.11 No.1
The natural convection and combined heat transfer induced by fire in a rectangular enclosure is numerically studied. The model for this numerical analysis is partially opened right wall. The solution procedure includes the standard k-ε model for turbulnt flow and the discrete ordinates method (DOM) is used for the calculation of radiauve heat transfer equation. In numerical study, SIMPLE algorithm is applied for fluid flow analysis, and the investigations of combustor gas induced by fire is performed by FAST model of HAZARDI program. In this study, numerical simulation on the combined naturnal convection and radiation is car ried out in a partial enclosure fifed with absorbed emitted gray media, but is not considered scattering problem. The streamlines, isothermal lines, average radiation intensity and kinetic energy are compared the results of pure convection with those of the combined convection-radiation, the combined heat transfer. Comparing the results of pure convection with those of the combined convection-radiation, the combined heat transfer analysis shows the stronger circulation than those of the pure convection. Three different location of heat source are considered to observe the effect of heat source location on the heat transfer phenomena. As the results, the circulation and the heat transfer in the left region from heating block are mich more influenced than those in the right region. It is also founded that the radiation effect cannot be neglected in analyzing the building in fire. And as the results of combustion gas analysis from FAST model, it is found that O_2 concentration is decreased according to time. While CO and CO_2 concentration are rapidly increased in the beginning(about 100sec), but slowly decreased from that time on.
김병국(Byeong-Kuk Kim),김종규(Jong-Kyu Kim),이문옥(Moon-Ock Lee) 전남대학교 수산과학연구소 2020 수산과학연구소논문집 Vol.28 No.2
Eight temperate seagrass species have been previously reported in coastal waters off the Korean Peninsula. Recently, the species, Halophila, which are mainly predominant in tropical and subtropical areas, have been discovered in the southern coast of Korea for the first time. This species were identified as Halophila nipponica. H. nipponica has been distributed in a warm temperate region of Japan where is under the influence by Tushima Warm Current, and was not previously found outside the Japanese archipelago. In this study, we carried out some numerical experiments to understand the process how the spores of H. nipponica disperse under the influence of the flow in coastal waters of Korea. For this, we used the EFDC to reproduce the dispersion process of the spores in terms of a particle tracking method. The numerical results represented a clockwise circulation of the flow at ebb tide with a velocity of roughly 3 cm/s. However, the particles did not move away too far from the spores site because the flow is fairly weak. In addition, the flow patterns had no significant difference from season to season.
기획논문 : 지방자치와 주민주권 ; 지방자치제도 하의 주민주권 확보방안: 시론적 연구
김병국 ( Byeong Kuk Kim ),최철호 ( Cheol Ho Choe ) 한국지방행정연구원 2012 地方行政硏究 Vol.26 No.1
최근 세계적인 정치-행정 패러다임은 다양화, 분권화로 요약할 수 있으며, 이는 지방자치를 통한 국가권력의 분권화, 다양한 지역특성을 고려하는 다양화를 추구하는 것을 보여준다. 즉, 지역의 특성을 고려한 국가권력의 이양은 기존의 국민주권으로부터 주민주권으로의 논의의 확대 또는 새로운 논의의 필요성이 제기되었다. 국가단위의 대의정치의 한계와 지방분권은 국민보다는 지역주민의 권리에 대한 논의가 이루어져야할 시점이다. 따라서 본 연구에서는 주민주권의 개념, 주민주권의 주요가치, 주민주권의 확보를 위한 제도적 한계와 개선방안에 관한 시론적 수준의 제안을 하였다. 첫째, 주민주권의 개념은 지역의 문제를 해결하는데 주민의 의사결정을 반영하는 것, 즉, 주민의 의사결정권을 의미하는 것이다. 둘째, 주민주권 확보를 위한 방안으로 지방정책에 대한 주민 스스로의 결정력 확대와 지방행정에 대한 주민 신뢰도 향상을 제시하였다. 셋째, 주민주권의 주요 가치로는 법리적 가치와, 제도적 가치로 구분할 수 있으며, 궁극적으로, 이들 가치는 법리적 형평성, 주민의 선택기회의 보장성, 그리고 주민참여의 절차적 타당성을 의미한다. 본 연구는 주민주권의 확보와 강화에 관한 연구로써, 향후 국민주권으로부터 주민주권으로의 권한이양에 따른 다양한 논의를 통해, 궁극적으로, 지방자치, 지방분권의 이상적 틀을 마련하는데 기여할 수 있을 것이다. The devolution of the national functions with concerns of the regional quality raises the necessity of new debate, including the expansion of the existing debate, about the sovereignty of the people from the national scope to the local scope. This study aim to propose the concept, the major values of the sovereignty of residents, and the institutional limits and the reformation to secure it. First, the concept of the sovereignty of residents is to reflect the residents` intention for the regional problem. Second, the expansion of the decision making by themselves and the improvement of the credibility for the local administration are proposed as a plan to hold the sovereignty of residents. Third, the major value of sovereignty of residents is composed of the legal value and institutional value. Those values express the legal equity, the guarantee of the chance for residents`s choice, and procedural validity of the residents` participation. This study can contribute to make ideal frameworks of the local government and the decentralization with the discussion of the devolution from the national scope to regional scope.