• Journal of Wetlands Research
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• v.3 no.2
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• pp.119-131
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• 2001

This study uses HEC-RAS for the quantitative aspects and the QUAL2E model for the qualitative aspects of the flow of urban streams, where the natural recovery system is applied. The instream flow of the small streams is estimated using the numerical model by verifying the existing data with the acquired data. The characteristics of the model reach place more weight on the drought discharge around the ordinary discharge, and this is caused by the natural recovery system that maintains the existing bank. The data of direct discharge to the sewage treatment plant through the inception pipe, BOD, DO, temperature, and so forth, are the official data from the department of environment. Considering the characteristics of small streams, the factors for the QUAL2E model are estimated with the focus on the hydraulic conditions and the stream view. This study proposes the future improvements for the natural recovery system by investigating the practical use of the waterfront and the application of the proper instream flow. Also, the hydraulic and hydrological investigation of the covering rate by the natural vegetation and the meandering by the varying river way is performed.

• Journal of Environmental Impact Assessment
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• v.17 no.1
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• pp.11-24
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• 2008

The Korea Environmental Impact Assessment (EIA) system was introduced in 1977 through the Environmental Conservation Act. It has progressed through many laws and regulations promoting the balance between development and conservation, and functioning as a Preventitive environmental policy. Despite the efforts to minimize environmental damage from development and to uplift social awareness of environmental preservation, deficient impartiality and objectivity in completing and investigating environmental assessments, there have continously existed conflicts among related stakeholder, neglecting arrangements and ineffectiveness of public participation. This research present EIA obstacles and analyzes the overall status of the EIA through surveys from related experts. On the basis of this research, the actual complications regarding the developer, public participation, examiner and consultant are brought about. Also, remedies are proposed to ensure effective EIAs and restore confidence in them.

• Journal of Korean Association for Spatial Structures
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• v.14 no.1
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• pp.69-76
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• 2014

When we excavate an underground to build basement, the ground anchors are needed to prevent collapse of neighboring ground, subsidence and movement. Ground anchor construction required shore sheet piles, wales and struts as to maintain secure excavation. Existing box-type bracket using head part of ground anchor can not be possibly adjustable to the boring angle because the brackets are manufactured with unified angle in a factory. Also, box-type brackets have imperfection and instability caused by inequable force. In this study, a new bracket system is proposed. The bracket's side plate is reinforced and the angle of boring can be controlled. To investigate the structural performance of presented brackets, FEM analysis has been performed by using ANSYS commercial program. As a result, this bracket shows sufficient stability for all angle case and the strength is increased about 24% than existing bracket.

• Asia pacific journal of information systems
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• v.11 no.1
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• pp.75-90
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• 2001

Computer-based systems operating between two or more co-operating organizations as part of their business relationship are generally referred to as inter-organizational systems(IOS). IOS automates aspects of transactional work between organizations and coordinate other activities. These systems facilitate organizational interaction as well as flows of materials, services and information. This planning provides as business direction for IOS applications, coordinates the efforts of participants, and deals with technical and non-technical IOS issues. This paper seeks to research the effect of strategic determinants of IOS to the efficiency of IOS. The determinants that selected from prior researches are top management support, is support and vendor/consultant support. The results show that the effect of top management support to efficiency of IOS was significant and this effect mediates the effect of other factors.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.2156-2159
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• 2011

본 연구에서는 접지시스템으로 부터 다양한 서지 및 노이즈 신호를 측정 진단하여 시스템에 오동작을 유발하는 원인을 규명하여 안정된 설비 운용을 확보한다. 오동작 및 설비 손상의 원인이 되는 노이즈 전류 및 간섭 현상을 제거하기 위해 운용중인 접지시스템의 성능 및 구조적 문제점을 데이터로 실측하였다. 진단 분석 결과를 이용하여 개선된 성능의 접지시스템 및 배선 구조를 제안하여 시공하였고, 개선 효과를 검증하기위해 시공 후 설비의 운용 상태 하에 접지 노이즈 신호를 재 측정하여 개선 전 측정 결과와 비교 분석하여 개선된 성능을 최종 확인하였다.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2017.05a
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• pp.219-219
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• 2017

This study aims at examining each firm's decision-makings of complex product and system (hereafter CoPS) innovation strategy, so that it tries to reveal the nature and role of CoPS innovations strategy. And it designed a comparative case study along with qualitative methods, by having two mobile operators' digital rights management (hereafter DRM) innovation in South Korea's digital music service industry. Through literature review, this study formulated three research propositions: (i) Each firm's decision-makings of CoPS innovations strategy are analytical negotiation process among economic actors in an industry; (ii) Each firm's market power originated from its market share from the installed base through network effect and switching cost influence decision-makings of CoPS innovation strategies; (iii) Each firm's decision-makings of different CoPS innovation strategies are related to their intension of achieving better market power, consequently dominant design. Through empirical examination of two mobile operators' decision-makings of DRM innovation strategy, this study empirically verified three research propositions.

• Journal of Navigation and Port Research
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• v.26 no.4
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• pp.455-463
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• 2002

In 1990s the debate on very large ships made the Mega ship and mega port concept emerge. Many studies have bees done on such big ships by consultant, naval architects, port designers, ship operators, economists etc,. with different points of view and results. This paper, by reviewing the literature systematically, identifies limitations and major issues, and suggests directions for further studies.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06c
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• pp.435-438
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• 2008

본 논문은 기업 온톨로지를 기반으로 하는 비즈니스 프로세스 컨설턴트 시스템(BUPCO)의 설계를 기술한다. BUPCO 시스템은 사용자 인터페이스, 프로세스 표현 도구, 프로세스 평가 도구, 프로세스 분석 도구, 워크플로우 영향분석 도구, 프로세스 시각화 도구로 구성된다. 그 기반에 기업의 프로세스 지식을 표현하기 위해 기업 온톨로지를 구축하고 온톨로지 추론을 위한 프롤로그 추론기를 개발하였다. BUPCO 시스템은 기업 업무 환경의 변화에 빠르게 적응할 수 있는 최적의 프로세스 개선안을 제공하는 것을 목적으로 한다. 이 시스템을 통해 기업은 내부의 각종 비효율성을 제거하고 프로세스와 자원을 최적화함으로써 기업의 경쟁력을 제고시킬 수 있을 것이다.

• Magazine of the Korean Society of Agricultural Engineers
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• v.45 no.4
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• pp.89-97
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• 2003

Using inference models developed for estimation of the parameters necessary to implement the Runoff Block of the Stormwater Management Model (SWMM), a number of alternative inference scenarios were developed to assess the influence of inference model complexity and structure on the calibration of the catchment modelling system. These inference models varied from the assumption of a spatially invariant value (catchment average) to spatially variable with each subcatchment having its own unique values. Fur-thermore, the influence of different measures of deviation between the recorded information and simulation predictions were considered. The results of these investigations indicate that the model performance is more influenced by model structure than complexity, and control parameter values are very much dependent on objective function selected as this factor was the most influential for both the initial estimates and the final results.

• Proceedings of the KIEE Conference
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• 1998.07c
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• pp.854-857
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• 1998

에너지관리, 제어 시스템(EMS)은 전력계통의 실시간 제어 및 총체적인 관리를 최대화하기 하여 컴퓨터 및 통신 시스템으로 구축된 제어시스템이다. 본 EMS의 주요특성은, 첫째 상당히 빠른 속도로 발전되는 컴퓨터 및 통신 기술들을 수시로 수용할 수 있는 기능, 둘째 상대적으로 지속적이며 오래토록 사용되는 수학적인 알고리즘 및 Buiness Rule들을 처리하는 소프트웨어를 급변하는 Computing 환경에서 적응해 갈 수 있는 기능, 셋째 Heterogenous한 시스템에 접속시킬 수 있는 Database를 갖추었다. 끝으로, 대형 전력계통의 Modeling과 이에 부합하는 실시간 Data로 자동화된 전력계통 실시간 운영상의 결과들을 해석 및 검증하였다.