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      • 옥상정원의 식재디자인 기법

        李英武,金秀炫 弘益大學校 科學技術硏究所 2003 科學技術硏究論文集 Vol.14 No.-

        There are significant difference in planting design between the ground planting and roof planting because of the foundation of planting. The major difference is the depth of the planting medium. The natural ground has the bottomless depth of soil where the capillary pores can ample spacs for the root growth. But on the roof the depth of soil has to be limited due to the stress to the building structure. Consequently the plants are chosen among the species which have shallow root system and ability to resist draught. The next problem is presence of strong wind. It provokes the forced evaporation is the from the leaves. So draught resistant plants are again recommended. The suitable species come from the coastal area where wind is strong and soil is sandy. The sandy soil drains fast and shallow roots are developed to catch the water fast. Another problem is the growing weight of the plants themselves. If the condition is favorable the plants grow and their weight pores stress to the building structure. It is wise to choose the shrubs whose mature weight is less than the full size trees. Also it is recommended to plant the heavy trees above the columns underneath to withstand the weight. If there is a seasonal prevailing wind the species like Pinus thunbergii should be planted towards the wind to form a barrier which in turn would protect the less handy species behind. In general low lying shrubs and ground covers are recommended unless the roof garden is planned forehand. It means the planting design is oriented towards more graphic patterns such as the parterre, knot garden or free flowing abstract design. This design approach is even more effective if the roof garden can be viewed from higher structures.

      • 고층건물의 벽면조경기법에 관한 연구

        李英武,李松宜 홍익대학교환경개발연구원 2001 환경개발연구논문집 Vol.6 No.-

        The purpose of this study is to consider the importance as well as the various techniques of landscaping the wall of architecture, and to examine the characteristics of the plants used on landscaping the wall of high rise buildings and present appropriate applicable techniques. Modern urban development was considered as a monument of mankind's volition and technology although it brought destruction of the natural environment. However the adverse reactions have gradually been perceived and now the importance of nature has been acknowledged. These days, for the expansion of urban green space, the restoration of the urban ecosystem and the normalization of abnormal climates in the city (the heat-island phenomenon, urban floods, exhaustion of underground water etc.) new attempts such as indoor gardens or rooftop gardens, wall surface landscapes etc. have come up rapidly. Many papers and studies related to this have been published. Especially due to the high-rise and highly dense structure of today's cities the effectiveness of wall surface landscaping has become increasingly highlighted. The techniques of landscaping the wall of high rise buildings improve the urban ecosystem and scenery while also creating amenity in urban spaces by providing habitats for insects and birds by screening the exterior of the desolate modern city with natural green life. Also by reducing radiation from the surface of buildings it helps control abnormal city climates such as the heat island phenomenon etc. and by reducing the change of surface temperature it cuts down on the energy of the whole city. Beside this it also protects the surface of the architecture and strengthens the structure as well as reducing air pollutions by expanding green space. Landscaping wall techniques ultimately provide citizens with a sense of security both mentally and emotionally, bringing vigor into the city. Although, as seen above, landscaping wall techniques can bring life into urban space in many ways, these have not been progressively inducted into present domestic landscape architecture. It is still being empirically applied, therefore presenting many limits to the expansion of new urban forest. This paper tries to cast a light to a new horizon.

      • KCI등재후보

        열분해성 고분자 도입에 따른 탄소분자체막의 기체 투과 특성

        이영무,이지민,박호범,김연국 한국막학회 2003 멤브레인 Vol.13 No.3

        Carbon molecular sieve (CMS) membranes were prepared by the pyrolysis of polyvinylpyrrolidone containing polyimide precursors. We have prepared the polymer precursors, pyrolyzed polymer and investigated the effect of pyrolyzing polymer on the characteristics of carbon structures and gas separation properties of the CMS membranes. Thermogravimetric analysis (TGA) showed the two-step decomposition of polymer precursor. First decomposition of the pyrolyzing polymer began around 400oC while carbonizing polymer showed the decomposition around 550oC. The gas permeabilities through the CMS membranes were enhanced by the introduction of the pyrolyzing polymer and decreased with increased final pyrolysis temperature. The CMS membrane pyrolyzed at 550oC derived from precursor containing 5wt% PVP as a pyrolyzing polymer showed gas permeability for O2 of 808 Barrers [10-10 cm3 (STP)cm/cm2scmHg] and O2/N2 selectivity of 7. Polyvinylpyrrolidone을 포함하는 폴리이미드 전구체의 열분해 공정을 통해 탄소분자체막을 제조하였으며 열분해성 고분자를 포함하는 전구체를 통해 제조된 막의 구조 및 기체 투과 특성에 대해 연구 하였다. 열분해성 고분자를 포함하는 전구체의 열적 특성을 조사한 결과 열적으로 안정한 폴리이미드의 경우 550oC에서 분해되는 것을 확인할 수 있었으며 열분해성 고분자의 경우 400oC에서 분해가 시작되는 것을 TGA를 통해 확인하였다. 제조된 탄소분자체막의 기체 투과 특성을 조사한 결과 최종 열분해 온도가 증가 됨에 따라 기체 투과도는 감소하였으며 열분해성 고분자를 포함한 전구체로부터 제조된 탄소분자체막의 경우 기체 투과가 향상 됨을 알 수 있었다. 열분해성 고분자를 함유하는 전구체로부터 550oC에서 열분해를 통해 제조된 탄소분자체막의 경우 O2 투과도 808 Barrer [10-10 cm3 (STP)cm/cm2scmHg]과 O2/N2 선택도 7을 나타내었다.

      • KCI등재

        투과증발법을 이용한 염소계 화합물 수용액의 분리

        이영무,유승민,오부근 한국막학회 1996 멤브레인 Vol.6 No.1

        본 연구는 독성이 매우 강하여 체내에 미량이 흡수되어도 큰 영향을 미치며, 난분해성 물질로서 재래식 방법으로는 잘 제거가 되지 않고 있는 염소계 유기화학물들인 트리클로로에틸렌(TCE)과 퍼클로로에틸렌(PCE)의 효과적인 분리 제거를 위하여 고분자 복합막을 이용한 투과증발법을 적용하여 검토하여 보았다. 고분자 복합막은 염소계 유기화합물에 대한 선택층으로써 폴리이소부틸렌(PIB), 기계적 강도를 높이기 위하여 지지층으로써 부직포위에 코팅된 다공성 폴리에테르술폰으로 구성되었다. 용해도 파라미터차(Δps)를 구한 결과, TCE 및 PCE에 대한 용해도 파라미터차가 물과의 용해도 파라미터차에 비해 훨씬 작음을 알 수 있으며, 이를 통해 폴리이소부틸렌은 염소계 유기화합물에 대한 복합막의 선택층 소재로 사용하기에 적합함을 알 수 있다. 투과증발법을 이용하여 TCE 및 PCE의 분리를 실시한 결과, 폴리이소부틸렌 복합막의 경우 TCE 및 PCE의 선택적 분리에 적합함을 알 수 있으며, TCE 보다 PCE의 선택적 제거에 더 적합함을 알 수 있었다. Polysulfone ultrafiltration membrane was coated with polyisobutylene(PIB) as a top layer to separate chlorinated hydrocarbons. The solubility parameter differences between PIB, water and perchloroethylene(PCE) or trichloroethylene(TCE) show that the solubility parameter difference between PIB and TCE or PCE is similar while that between PIB and water is far less, indicating that PIB is selective to chlorinated hydrocarbons. The pervaporation separation of TCE and PCE shows that TCE is concentrated more than four times, by PIB composite membrane, while PCE is concentrated more than thirteen times. This result shows that PIB composite membrane in this study seems to be an appropriate selective layer for the separation of TCE and PCE from aqueous organic solutions.

      • 옥상정원의 시설물 설치기준에 관한 연구

        李英武,李承勳 홍익대학교환경개발연구원 2002 환경개발연구논문집 Vol.7 No.-

        The purpose of this thesis is to provide a guideline for the installation of landscape facilities on a roof garden. The space where roof gardens can be installed are flat slab rooftop of buildings, terraces, top of underground garages, top of bridges and top of podium. The items to be considered when installing landscape facilities are, first, the weight should be lighter than the buildings carrying capacity and equally distributed. The second consideration is the waterproofing of the slab surface. When trees are planted in planter box and irrigated the seepage through the rooftop may occur. This is one of the major problems of roof garden construction especially in the case of pools and fountains. The third item is the problem of strong wind. The wind screen can be built around to prevent the ball of trees and wilting by the forced evaporation. The fourth problem is the danger of falling of people and articles. This situation can be alleviated by planting shrubs around or building fences. These also prevent dizzy ness. The rest are the position of viewing facilities towards good views, screening such undesirable structures as water tanks, ventilation pipes, cooling towers. The last consideration is the easy access of bulky materials during the garden construction. The major facilities of a roof garden are pavings, pergola, deck, gazebo, gable, bench, trash can, drinking fountain, vending machine, pool fountain, planter, fence, container, lighting, irrigation pipe, drain, billboard, helipad, gondola, wind screen, sculpture and play structure. Besides the construction guidelines the layout of facilities should be done from the viewpoint of adjacent tall buildings. The garden can be viewed as a canvas of a painting.

      • SCOPUSKCI등재

        액정성 히드록시프로필키틴의 유기용매에 대한 용해성

        이영무,김성수,김선정,성용길,강인규,손태일 ( Young Moo Lee,Seong Soo Kim,Seon Jeong Kim,Yong Kiel Sung,In Kyu Kang,Tae Il Son ) 한국공업화학회 1993 공업화학 Vol.4 No.2

        키틴과 프로필렌 옥시드를 반응시켜 히드록시프로필 키틴(HPCH)을 얻었고 할로겐화 유기용매내에서 HPCH의 액정형성능을 관찰하였다. 키틴과 HPCH의 고체 ^(13)C NMR 스펙트럼 분석 결과 히드록시프로필기의 도입을 확인하였다. 원소분석결과 히드록시프로필기의 치환도는 0.8정도였다. WAXD패턴 측정결과 키틴에 히드록시프로필기가 도입됨에 따라 결정성은 감소하였고 유기용매에 대한 용해도는 증가하였다. HPCH를 디클로로아세트산과 1, 2-디클로로에탄 혼합용매에 녹여 편광현미경으로 관찰한 결과 25% 이상의 용액농도에서 클레스테릭 액정상에서 전형적으로 관측되는 지문영역이 나타남을 알 수 있었다. 용액의 점도는 시간변화에 따라 감소함을 알 수 있었다. Hydroxypropyl chitin(HPCH) was prepared from chitin by reacting it with propylene oxide. The formation of liquid crystalline character of HPCH was investigated using halogenated organic solvents. Solid state ^(13)C NMR spectra for chitin and HPCH confirmed the incorporation of hydroxypropyl moiety. The degree of substitution of HPCH was around 0.8 as detected by elemental analysis. WAXD patterns of chitin and HPCH showed that an incorporation of hydroxypropyl unit in chitin contributed to reducing the crystallinity and enhancing the solubility in organic solvents. Polarized light microscopic pictures of concentrated HPCH solution showed that HPCH formed cholesteric liquid crystalline character at about 25w/v% solution in dichloroacetic acid and 1, 2-dichloroethane. Inherent viscosity of HPCH solution in a mixed solvent showed a transient decrease.

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