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.

「IMF 시대」대미 외교의 방향

김성한 한국전략문제연구소 1998 전략연구 Vol.5 No.3

Ⅰ Korea's economic crisis has begun to force potentially important changes in the peace-building process on the Korean peninsula. The inauguration of President Kim Dae-jung under the financial crisis has led to a more conciliatory South Korean policy toward North Korea, thereby broadening public support in South Korea for the 'engagement' policy to North Korea while dampening desires for near-term Korean reunification. Recent developments on the Korean peninsula will require closer policy coordination between the United States and Korea on a broad range of issues including the KEDO process. Tactical coordination on such issues as food aid. progress in the pace of North-South relations, how to apply or relieve political and economic sanctions on North Korea, and how to respond to sudden economic and political changes in North Korea is exceedingly difficult, but critical. In order to make the Korea-U.S. policy coordination more effective, first of all, the Korean government needs to convince the U.S. government that the U.S. remain South Korea's ally rather than playing the role of a mediator between the two Koreas. The Clinton Administration could attempt to mediate between the two Koreas in the four-party peace process. Thus, Korea needs to. emphasize to the U.S. for instance, that the past data on North Korea's nuclear program be preserved and that the issue of North Korean missiles be dealt with not only in terms of their export problem but also of their development and deployment on the peninsula. Second. Korea and the U.S. should make all efforts to make their alliance enter a consolidation stage in which they frequently consult each other on bilateral as well as regional issues and seek agenda-building on the basis of shared democratic values between the two countries. In order to make it possible. Korea needs to well manage. through the political leadership. its relationship with China and the increasing cynicism of the conservative middle class to the U.S. Finally. on the basis of the mutual security alliance between Korea and the U.S.. a collective security system for the Northeast Asian region needs to be created. While bilateral security arrangements will remain the backbone of Northeast Asian security for a considerable period of time. the emerging new order raises the need for such a multilateral setting as the NEASED that was proposed by the Korean government in 1994. Korea should try to make it feasible and also actively participate in the multilateral activities at the track-II level. Ⅱ One important area where the interests coincide between the U.S. and Korea is one in which Korea. for the purpose of survival. and the U.S.. in order to protect its leadership, need an equilibrium within the region where Korea is located. An hegemonic order in Northeast Asia would threaten the U.S. leadership position as well as the political independence of Korea. However. the convergence of interests does not always guarantee policy coordination, since Korea and the U.S. can have different policy priorities. The resolution for the priority divergence between Korea and the U.S. can be achieved through redefinition of the alliance that is to be focused on regional priorities. In other words, both countries need to put their first priority on the strategic interests in Northeast Asia including the Korean peninsula. This is the way by which the global interest of the U.S. and the peninsular interest of Korea can be converged at the regional level. Thus, both countries should emphasize that the Korea-U.S. alliance. that was created to deter North Korea's military threat, will ultimately contribute to stability in Northeast Asia. and that the alliance will continue even after the threat from North Korea disappears. In addition. Korea and the C.S. should start preparing for crisis management in the case of North Korea's sudden collapse. Ⅲ Korea and the U.S. will have to begin consulting each other concerning the necessary steps to transform the alliance into the regional one. A key issue that is to be put on the table will be the role and force structure of the U.S. forces in unified Korea. Korea and the U.S. will have three options. They have to decide whether they will actually terminate the alliance by completely withdrawing American troops from Korea or preserve a reconfigurated alliance only with U.S. naval and air presence. or redefine their relationship toward an alliance for stability and interdependence with a token presence of ground forces together with the current level of naval and air forces. The first option of a complete withdrawal of American troops runs the risk of precipitating a power vacuum which is most likely to be filled either by China or Japan. and to trigger Sino-Japanese rivalry and arms race. Should Korea be left alone in the wilderness without an ally, there will arise mounting pressure for developing nuclear weapons in Korea. which could lead to a ''balance of terror." The second option of a reconfigurated alliance with naval and air presence can provide deterrence and reassurance to Korea to a certain degree. However. an alliance without U.S. ground forces cannot guarantee automatic American involvement in the emergency situation that could happen in Korea. In this case. the very credibility of American security commitment will be severely questioned politically. The last option of the alliance with a token U.S. ground force and naval/air forces can be a basis for deterring the rise of hegemonism in Northeast Asia and for preventing Korea from seeking a nuclear option. A small size (3000-5000) of U.S. ground forces in the southern part of Korea. far from the Chinese border. can play an effective hedge against the destabilizing forces and the uncertainty they will bring in Korea. However. this option requires a precondition, which is the Korean people's conviction that the U.S. has contributed to Korea's unification. Otherwise. the revitalizing task of the Korea-U.S. alliance will face insurmountable obstacles.

웹기반 IPTV 미들웨어 표준화 동향

김성한,이승윤,Kim, Sunghan,Lee, Seung-Yun 한국정보통신학회 2009 한국정보통신학회지 Vol.10 No.2

석유제품판매계획시스템

김성한,Kim, Seong-Han 대한석유협회 1999 석유와 에너지 Vol.1999 No.1

ITU-T IPTV-GSI 회의

김성한,Kim, Seong-Han 한국정보통신기술협회 2010 TTA저널 Vol.132 No.-

피서차량, 휘발유 씀씀이 높아

김성한,Kim, Seong-Han 대한석유협회 1996 석유와 에너지 Vol.1996 No.8

ITU-T SG13 표준화 동향

김성한,오행석,최준균,Kim, S.H.,Oh, H.S.,Choi, J.K. 한국전자통신연구원 1999 전자통신동향분석 Vol.14 No.6

본 고에서는 국제표준화 기관인 ITU-T에서 진행하고 있는 B-ISDN의 일반적인 망 측면을 다루고 있는 Study Group 13의 표준화 활동에 대하여 주요 기술현황을 설명한다.

소실모형주조법의 현황 및 전망

김성한,Kim, Seong-Han 재료연구소 1996 機械와 材料 Vol.8 No.4

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.

온난화의 경고, 해수면 상승의 위협

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."