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김성한,윤인길,송성주,김영의,권오섭 ( Seong Han Kim,In Kil Yoon,Seong Ju Song,Young Eui Kim,O Seob Kwon ) 한국하천호수학회 1996 생태와 환경 Vol.29 No.3
Depth profiles of physico-chemical parameters and distributions of benthic microorganisms were measured at the sediments of Ulsukdo, Naktong Estuary to identify the relatedness with the anaerobic degradation of sedimented organic matters. The organic contents, total nitrogen, and total phosphorous were decreased with increasing depth, but the patterns of inorganic nutrients of porewater showed no distinct profiles. Among inorganic sulfur compounds, the concentration of sulfide was varied with the depth. The observation that the highest cell numbers of total bacteria, heterotrophic bacteria, sulfur-oxidizing bacteria, anaerobic photosynthetic bacteria, and sulfate-reducing bacteria were found in the uppermost layer of the sediment was well coincided with the depth profiles of parameters of nutrient loading. At the upper layer of sediments, the density of methanogens was lower than that of sulfate-reducing bacteria, but at the lower layer, the former was higher. With this result, it could be supposed that at the upper sediments layer of Ulsukdo the fermentation products of organics were degraded mainly by sulfate-reducing bacteria but at the lower layer methanogens were the main degrading ones. Although the depth profiles of organic contents and sulfur bacteria had similar patterns, the distributions of inorganic sulfur compounds except sulfide were nearly constant and the cell numbers of sulfur bacteria were only a very few portions of total bacterial counts. These resulsts suggest that the effects of sulfur bacteria on the cycling of sedimented organics might be negligible at Ulsukdo of Naktong River Estuary.
비포화대 지연배수 효과를 고려한 지하수위 변동모델의 개선 및 적용
김성한,박은규,김용성,김남진,Kim, Seong-Han,Park, Eun-Gyu,Kim, Yong-Sung,Kim, Nam-Jin 한국지하수토양환경학회 2011 지하수토양환경 Vol.16 No.3
Recently, a physically based model of water-table fluctuation due to precipitation is developed based on aquifer water balance model. In the model, it was assumed that the water infiltration into ground surface is advection dominant and immediately reaches to water-table. The assumption may be suited for the sites where the water-table is shallow and/or the permeability of the unsaturated zone is high. However, there are more cases where the model is not directly applicable due to thick and low permeable unsaturated zone. For the low permeability unsaturated zone, the pattern of water flux passing through unsaturated zone is diffusive as well as advective. In this study, to improve the previously developed water-table fluctuation model, we combined the delayed drainage model, which has long been used in well hydraulics, to the water-table fluctuation model. To test the validity of the development, we apply the developed model to 5 different domestic sites. The model parameters are calibrated based on the groundwater hydrograph and the precipitation time series, and the correlation analyses among the parameters are pursued. The overall analyses on the delineated model parameters indicate that the delayed drainage parameters or delay index used in the developed model are able to reveal drainage information in the unsaturated zones.
XML 기반의 e-비즈니스 문서 생성을 위한 폼 생성시스템
김성한,김창수,정회경,Kim, Seong-Han,Kim, Chang-Su,Jeong, Hoe-Gyeong 한국정보처리학회 2002 정보처리학회논문지D Vol.9 No.4
In this paper, XML form generator is designed and implemented on the basis of e-business's DTD (Document Type Definition) document. Rapid evolving for internet services and information infrastructure give many impacts on the e-business, it need to make a new kinds of web-based or electronic-based document formats for e-business transaction trading. In current situations, there are many kinds of document formats on conventional business documents for each companies. And, it has many problems on the aspects of the document reusability and cost to support interoperability between documents for the trading partners. To solve this interoperability of documents, the constructed XML form generator is changing XML form document into HTML (HyperText Markup Language) based web document by XSLT. And it also generates XML business message validating for e-Business DTD by user Inputs. 본 논문에서는 e-비즈니스 DTD(Document Type Definition) 문서를 기반으로 한 XML 폼 생성기(Form Generator)를 설계 및 구현하였다. 인터넷 보급과 정보환경 변화는 e-비즈니스에 있어서 많은 변화를 제공하였고, 거래에 사용될 비즈니스 문서 양식에 있어서도 웹 형식이거나 전자화된 전용 양식 형태로 변환될 필요가 있게 되었다. 이러한 상황에서 각각의 업체별로 다양한 문서 포맷을 사용하여, 상호주체 간에 포맷 호환성 제공을 위한 필요성이 제기되며, 따라서 재사용성과 포맷 호환성 지원에 따른 비용의 문제를 안고 있다. 이에 따라, 논문에서 제안하는 XML 폼 생성기는 XSLT를 이용하여, 생성 결과인 XML 폼 문서에 HTML(HyperText Markup Language) 형태의 웹 문서로 생성 후에, 사용자 입력을 통해 e-비즈니스 DTD 문서 구조에 유효한 XML 비즈니스 메시지를 작성할 수 있다.
김성한,윤인길,권오섭 ( Seong Han Kim,In Kil Yoon,O Seob Kwon ) 한국하천호수학회 1997 생태와 환경 Vol.30 No.3
Under the laboratory batch systems, we measured the nutrient release from the sediment of Seo-Naktong River to the overlying water. The concentration of NH_4+ in the water columns appeared the maximum at the beginning of incubation and decreased until 10-day incubation, and after that time the concentrations were relatively constant. The variation pattern of NO-3- was reversely matched with the pattern of NH_4+, and the maximum of PO-43- was detected at 24-day incubation. With this concentration changes of nutrients, NH_4+ release from the sediment layer to the water column of Seo-Naktong River was calculated as 53.9 mg-N/m^2/d, and PO_43- release as 5.3 mg-P/m^2/d. Considering the changes of nutrients, dissolved oxygen, and pH of water column and sediment porewater in the incubation chambers, and the field data of Seo-Naktong River, the mechanism of nutrient release in Naktong River was supposed that high concentrations of NH_4+ released are oxidized to NO-3- via nitrification, and the resulting anaerobic condition, especially in bottom layer of water column, stimulates the release of P0_43-.
김성한,Kim, Seong-Han 한국건설안전협회 2009 建設 安全技術 Vol.49 No.-
"해수면 상승의 위협은 이미 나타나기 시작했고, 또 미래 어느 순간에는 되돌리기 힘든 재앙으로 다가올지 모른다."