• 한국전산유체공학회:학술대회논문집
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• 2004.10a
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• pp.7-14
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• 2004

It is well known that preconditioning methods are efficient for convergence acceleration at compressible low Mach number flows. In this study, the original Euler equations and three preconditioners nondimensionalized differently are implemented in two dimensional inviscid bump flows using the 3rd order MUSCL and DADI schemes as flux discretization and time integration respectively. The multigrid and local time stepping methods are also used to accelerate the convergence. The test case indicates that a properly modified local preconditioning technique involving concepts of a global preconditioning one produces Mach number independent convergence. Besides, an asymptotic analysis for properties of preconditioning methods is added.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.12
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• pp.6176-6186
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• 2012

Many research and case study for BIM have mainly been focused on architecture domain. However, it is insufficient to civil engineering domain. Although BIM will be applied to civil engineering domain. because national BIM standard and delivery system of BIM is not ready, these demands are increasing. First of all, this paper analyzed the current status of the IFC international standards and BIM of civil engineering domain. Second of all, we established the roadmap for BIM development for civil engineering domain. And this paper studied on the BIM application of road construction for a step by step development of civil engineering. Finally, we conduct case study about road project by applying to construction information classification.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.10
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• pp.4837-4844
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• 2012

Construction Project Information System, which has promoted to improve the system during the past five years, is recently required to revise the new Roadmap of this system based on the rapidly changing construction industry's environment. For this reason, the present study was investigated the present condition of construction information, drawn CSF using SWOT method, presented the project direction, strategy, the priority plan, the specific task, and WBS by taskes. This Roadmap may be used to a basis data in measuring the result of construction informatization, and presented to the progress direction of information system in construction field.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1671-1672
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• 2012

최근 정부는 대민서비스 향상을 위해 인터넷 등 전자적으로 신청하는 민원의 신청수수료 전자납부 절차를 제공하고 있으나, 민원처리 과정에서 금액이 결정되는 허가수수료와 서면민원의 신청수수료는 전자납부 절차가 없어 수수료를 수입인지로 납부하고 있다. 본 연구에서는 기존 인터넷 민원 신청수수료 전자납부절차를 개선하여, 모든 민원수수료의 전자납부 방안을 제시함으로써 인허가기관의 민원수수료 관리의 투명성 및 업무효율성 제고와 대국민 불편해소를 도모하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1689-1690
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• 2012

본 연구는 국토해양부의 도로 하천 항만건설분야에 적용중인 건설정보시스템(건설사업관리시스템 항만건설통합정보시스템) 간에 차이점을 파악하고, 공사계약이 체결된 이후인 사업관리 초기단계에서 건설 정보시스템을 이용한 사용자등록, 사업 공사등록 및 공사 대장 작성 보고 업무를 대상으로 시스템간 통합 방안을 마련하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.1271-1274
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• 2012

최근 과학적 정책결정의 합리성을 뒷받침하기 위해 신속하고 정확한 통계정보에 대한 수요가 급증하고 있다. 이에 국토해양부는 매년 발간하는 도로현황조서의 신속한 자료 취합 및 시의적절한 맞춤형 통계자료 제공 등 활용성 제고를 위해 도로현황조서시스템 구축을 진행하고 있다. 본 논문에서는 기존 도로현황조서 작업업무 및 제한사항을 분석하고, 도로현황 정보에 대한 다양한 요구사항에 대처하기 위해 웹기반의 도로현황조서시스템 구축방안에 대하여 기술하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.751-753
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• 2013

'98년 건설CALS기본계획을 바탕으로 개발된 건설CALS시스템은 건설사업관리 건설인허가 단위시스템을 시작으로 시설물유지관리 용지보상 건설CALS포탈 등 5개 단위시스템을 개발하여 운영중에 있으며 국내 900여개 이상의 건설현장 및 건설 관련 공공기관에서 사용하고 있다. 그러나 각 단위시스템의 개발 시기 도구 등이 서로 상이하여 사용자 요구사항 및 법령 개정에 따른 시스템 개편 등 외부 환경변화의 패러다임을 적용하기 어려운 실정이다. 이에 본 논문에서는 각 단위 시스템의 구조적 요소를 통일하고 외부환경의 적용이 가능한 전자정부 표준프레임워크의 적용 가능성을 분석하였다. 이는 객체 지향 중심의 웹 시스템 구조를 프레임워크 기반으로 변경하는 것으로써 시스템 재사용성이 향상되고 신규 기능 추가가 용이해지며 리소스 절감이 가능할 것이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.1053-1054
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• 2013

과거 건설사업관리업무를 수행하는 건설사 업무담당자들은 방대한 보고자료를 발주기관으로 전송할 경우 주로 웹하드를 이용하였다. 그러나, 최근 개인정보 유출 등 각종 인터넷 보안사고가 빈번히 발생함에 따라 발주기관별로 기관 내부망과 외부망으로 분리하여 네트워크 보안을 강화하는 추세에 있다. 이에 따라, 건설사에서 발주기관으로 대용량 파일을 전송하지 못함으로서 발주청의 건설사업관리 업무처리에 어려움이 발생하였다. 이러한 문제를 해결하기 위하여 본 연구는 망분리 환경하에서 특정 사용자만을 위한 자료 공유체계를 마련하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.5
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• pp.3183-3191
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• 2014

It is essential to effectively manage facilities because operating and maintenance cost for them accounts for more than 83% of lifecycle cost. This study developed BIM Object-based classification list to manage information required to operating and maintenance phase of them from design and construction phase. In order to develop this classification list, Construction Information Classification System, Design Criteria for Architectural Electrical Installations, commodity list classification of PPS(Public Procurement Service) were analyzed. and problems for consisting of object classification list were drawn. And each materials is classified that drawings discipline code (KSF 1540:2010 (Principle and criteria for CAD Drawing) was classified as level 1 to cover main areas and construction information classification system was classified as level 2 to cover elements also UNSPSC was classified as level 3 to cover objects for devices and equipments. this classification criteria was given code. This study is expected to be useful to exchange and share information in operating and maintenance phase by offering object point of view classification in design and construction phase. besides, it is looking forward to effective operating and maintenance of facilities by enabling management of devices and equipments by function, space, use.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.12
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• pp.7430-7437
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• 2014

Owing to the increase in large and complex construction projects, the design paradigm of architecture and civil engineering projects has changed from 2D CAD to 3D CAD. For this reason, to meet the strong requirements of project contractors, various efforts have been made to adopt a Building Information Modeling (BIM) technology for effective construction management. On the other hand, compared to architectural projects, only a few civil engineering project cases have been conducted in the perspective of public contractors. This is because the characteristics of civil project contractors and the negative pursuit of adopting BIM technology due to the lack of a current BIM system and technologies. Recently, positive changes in adopting BIM technology for public projects were anticipated by public owners, such as the Public Procurement Service and the Ministry of Land, Infrastructure and Transport. In this regard, this study analyzed the current BIM technology status of public owners in Korea to adopt the BIM policies and guidelines of the Korean government. Strategies for adopting BIM technologies for Korean public owners are also discussed based on an analysis of civil engineering BIM project cases.