• Korean Journal of Construction Engineering and Management
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• v.11 no.4
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• pp.51-58
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• 2010

The purpose of this study is to analyze problems and suggest improvement scheme based on questionnaire survey to design VE status for apartment buildings. For this study, the adapted research methods are case studies of design VE to construction companies and questionnaire survay to design staffs. The results of this study are as follows: 1) In the system aspect, the problems of design VE for apartment buildings are insufficiency of regulation and difficulty of performing design VE actively. In the performance aspect, the problems is absence of design VE procedure suited to apartment buildings. 2) In the system side, the improvements of design VE for apartment buildings include regulatory enlargement of design VE application for apartment buildings and rearrangement of VE incentive system for design staffs. In the performance side, a VE procedure suited to apartment buildings is developed and suggested.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.618-621
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• 2003

The purpose of this study was to propose the participation of consultant pertinent to ground situations. The careful consideration of participating consultant reduces life cycle cost. duration and improves quality. The first step is studying Curtain-wall construction process by researching the documents, and Second step is analyzing Curtain-wall construction's problem through having a interview with a concerned experts (Architect, Gene-con, Sub-con. Consultant). Then we study how consultant solves the problem, propose the way of participation of consultant. The way of participation consist of three phases. the first one is to participate in design & construction process and the second one is to participate in design process, the third one is to participate in construction process. These participations are decided by evaluating project, design phase. construction phase. The verification of these participating strategies was implemented by the interview with the experts.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.504-509
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• 2004

Safety assessment of construction projects may be affected by various factors such as types and scale of projects, construction methods, procedure, climactic, and site conditions etc. Presently, in planning and design phases, designers are still often uncertain of their responsibilities, l3i]I information and training of safety. Therefore, designers are still failing to exploit the potential that have to eliminate and reduce risks on site. In this study, the concepts of safety impact assessment is introduced in order to derive the performing design for safety in design phase. For this purpose, a framework for safety impact assessment model using risk-based approach for construction projects is suggested. The suggested model includes of information survey and scenarios, classification of safety impact factors occurred by design and construction, and quantitative estimation of magnitude and frequency. Moreover, the checklist which is enable to identify relationship between safety impact factors and design factors is developed and the methodology of safety impact assessment model using risk-based approach is also proposed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.260-262
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• 2012

세계 주요 항만간 물류중심 기지화 경쟁이 격화되고 있는 가운데, 세계 물류중심국가로 선점 또는 우위를 차지하기 위하여 타 항만 보다 유리한 물류의 첨단화와 지리적 이점을 이용한 물류중심 거점 공간을 육성하여 세계 물류중심 기지 구축에 있어 선점하는데 있다.

• Information and Communications Magazine
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• v.14 no.3
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• pp.65-74
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• 1997

본 고에서는 IS-95A 방식의 CDMA PCS 시스템과 호환되는 업무용 혹은 가정용 CT 구현을 위한 방안에 관하여 논의한다. 이를 위해 CT시스템의 CDMA 물리동기 및 프레임 동기를 획득하는 방안과 PCS/CT 이중모드의 효과적인 운용 방안을 구체적으로 제시한다. 설계의 접근방식으로는 동기방식을 위주로 하였으나 비동기방식에 대해서도 논의하였다. 제안되는 CT 시스템은 주파수 재활용도를 높이는 측면에서 Upbanded IS-95A PCS 시스템의 스펙트럼 상에서 동작하고 PCS 단말내의 H/W 통신 모듈을 변형없이 그대로 사용하므로 개발기간을 단축시키고 PCS 망과의 간섭을 최소화시킬 수 있을 것으로 기대된다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.10a
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• pp.28-28
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• 2003

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2023.10a
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• pp.10-13
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• 2023

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.589-592
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• 2003

Our government suggested an integrated construction information classification system (CICS) for improving construction information exchange between project participants. However, because a database for integrating construction documents and drawings is insufficiently built, there are many restrictions in using CICS. Therefore, this study suggests a methodology to integrate and manage the construction documents and drawings by CICS. The methodology suggested in the study is verified to a web-based construction documents and drawings management system with integrated DB.

• Journal of the Korean Society of Propulsion Engineers
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• v.15 no.1
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• pp.83-89
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• 2011

A design plan was proposed for determining combustor configuration of regenerative- cooled liquid rocket engine in the process of preliminary design. Rocket performance and regenerative cooling results were calculated using the properties of combustion gas estimated in CEA. For required thrust, chamber pressure, atmosphere pressure and propellant mixture ratio the mass flow rate of propellants and combustor performance were predicted by one-dimensional and experimental correlations. Finally, determinable plan for the contour of combustor were presented through Rao nozzle design method.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2010.11a
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• pp.37-42
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• 2010

A design plan was proposed for determining combustor configuration of regenerative- cooled liquid rocket engine in the process of preliminary design. Rocket performance and regenerative cooling results were calculated using the properties of combustion gas estimated in CEA. For required thrust, chamber pressure, atmosphere pressure and propellant mixture ratio the mass flow rate of propellants and combustor performance were predicted using one-dimensional and experimental equations. Finally, determinable plan for contour of combustor were presented through Rao nozzle design method.