• Proceedings of the Korea Society for Simulation Conference
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• 1999.10a
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• pp.41-45
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• 1999

본 논문에서는 소프트웨어 시스템의 설계 및 구현 과정에서 있을 수 있는 설계 변경 및 이에 따른 다른 변경 요인들을 정확하게 파악하고, 구현상의 변경으로 인한 전체 시스템이 영향 등을 체계적으로 정립하는 소프트웨어 설계 방법론을 특정 공정의 사용자 인터페이스 시스템을 통해 제시하였다. 대상 시스템, 즉 인터페이스 시스템을 시스템 이론(System theory)에서 정의하는 구조적 입출력 시스템 레벨(Structural I/O System level)의 요소들로 표현하고 다시 구조적 입출력 시스템 레벨을 입출력 시스템 레벨(I/O System level)로 변환하였다. 이를 다시 DEVS 모델로 재구성하여 DEVS(Discrete EVent system Specification) 시뮬레이션 환경에서 제공하는 시뮬레이터를 통하여 대상 시스템의 중요한 동적 특성을 소프트웨어 초기설계 시 또는 설계 변경 후 미리 파악할 수 있도록 하였다.

• Korean Journal of Construction Engineering and Management
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• v.17 no.2
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• pp.127-134
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• 2016

Design modification is one of the elements that must be controlled in the process of any construction project. Especially a military facility project comes with more obstacles than private work due to the unique characteristics and closeness of the military. As there are both the project manager and the user within the ordering body, it is likely to have difficulties unless communication is conducted smoothly. The reason is that such issues regarding communication lead to design modification and it will result in the user's dissatisfaction. Thus this study aimed to identify the elements that generally cause design modification by analyzing characteristics of military projects from the status of current project contracts, analyzing past elements that lead to design modification and comprehensively researching responds from the survey on operators of facility projects. It is expected that loss from design modification of military facility projects is reduced by proposing feasible and practical improvements.

• Korean Journal of Construction Engineering and Management
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• v.1 no.1 s.1
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• pp.72-79
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• 2000

Design quality in constructed project is a primary consideration to achieve overall project objectives. It is not easy to evaluate the design quality because various factors are involved in the design process. This paper presents a new approach to improve the evaluation process of design quality In the construction project The evaluation model is developed to satisfy the requirement for implementing the ISO 9000 Quality Assurance Standards in the design process. It is assumed that design changes are resulted from the poor management of design quality. The model relates design changes to design quality management items. It assigns weight ratio to each design quality item to evaluate quantitatively Design Quality Index (DQI) is calculated to assess design quality based on the Objectives Matrix. A case study is performed to illustrate the practical implementation of the design quality evaluation.

• The Journal of the Korea Contents Association
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• v.11 no.7
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• pp.497-507
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• 2011

This paper develops the steel-house design interface that helps make building design effectively done by constructing building materials as components and assembling them as patterns. It also aims to develop the Flexible Building Design System that supports a technology which makes change of constructing easy and reduces the cost effectively through a simulation of building design like design, analysis, change information, etc., by grafting the virtual building technology into the process of building. It especially is possible for a designer and user to change a building easily by using patterns and according to the change, pattern information of materials needed and the plans of the building are made automatically. Kin-search that can be happened through personal proficiency or knowledge visualization is also the reason why the technology should be embodied.

• Journal of Digital Convergence
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• v.11 no.4
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• pp.273-278
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• 2013

This paper simulated the virtual constructions design that helps make constructions design effectively done by assembling materials as components and patterns using studs in steel house method. We also propose the virtual constructions design technology which makes change of constructing easy and reduces the cost effectively through a simulation of construction design like design, analysis, change information, and assembly in the construction field. It especially is possible for designers and users to change internal and external of a construction easily by using patterns.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.36 no.1
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• pp.39-48
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• 2023

Because a railway bridge is designed over a long period of time and covers a large site, it involves various environmental factors and uncertainties. For this reason, design changes often occur, even if the design was thoroughly reviewed in the initial design stage. In particular, design changes of large-scale facilities, such as railway bridges, consume significant time and cost, and it is extremely inefficient to repeat all the procedures each time. In this study, a technique that can improve the efficiency of learning after design change was developed by utilizing the learning result before design change through transfer learning among deep-learning algorithms. For analysis, scenarios were created, and a database was built using a previously developed railway bridge deep-learning-based prediction system. The proposed method results in similar accuracy when learning only 1000 data points in the new domain compared with the 8000 data points used for learning in the old domain before the design change. Moreover, it was confirmed that it has a faster convergence speed.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 1994.10a
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• pp.225-230
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• 1994

본 연구에서는 진동특성을 개선하기 위한 방법으로서 구조물이 가지는 공간적인 좌표를 설계변수로 하여 감도를 구하고, 이를 이용하여 구조물의 길이와 높이에 대한 형상을 변경하는 최적구조변경법에 대해 예시하고자 한다. 먼저 모우드합성법을 이용하여 임의 치수의 L형 구조물의 진동특성을 해석하고, 진동 특성을 변경하기 위해 감도해석법으로 변경할 부분의 감도를 구하여 변경할 부분의 변경량을 계산한다. 그리고 변경한 후 재해석을 통해 결과를 비교함으로써 제시한 방법의 타당성을 고찰하고자 한다.

• Journal of the Korean Institute of Navigation
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• v.25 no.1
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• pp.45-52
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• 2001

The purpose of this study is the optimum modification of dynamic characteristics of stiffened plate structure. In the method of the optimization, finite element method(FEM), sensitivity analysis and optimum structural modification method are used. To begin with, using FEM, the dynamic characteristics of stiffened plate structure is analyzed. Next, rate of change of dynamic characteristics by the change of design variable is calculated using the sensitivity analysis. Then, amount of change of design variable is calculated using this sensitivity value and optimum structural modification method. The change of natural frequency is made to be an objective function. Thickness of plate and cross section moment become a design variable. It is shown that the results are effective in the optimum modification for dynamic characteristics of the stiffened plate structure.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2006.11a
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• pp.301-304
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• 2006

The insistence of rights and interests in contract is being generalized by opening in construction market which is following F.T.A, internationally. Conditions of contract in construction have different specialities compared with other industries. Different conditions of contract should be established because of a specific character that is different from each construction, such as work, environment, circumference conditions. Although the order of Turn-key is being expanded by increasing construction scale and demanding hybrid function, the suitable regulations of contract are not settled. As a result, various factors of claim is occurring in Change Order-Claim, because they just obey a part of guide-line. This study suggests useful solutions in detail concerned with the main factor of Change Order-Claim by each D/B phases through practical sorting and analysis of the causes of Change Order-Claim.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.365-366
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• 2023

The purpose of this study is to prevent dispute due to change orders in construction projects and to handle change orders smoothly. For this purpose, this study analyzed arbitration cases caused by change order handled by the Korea Commercial Arbitration Board. Based on this, dispute factors were analyzed and change order management factors and management plans were presented. Change order management factors were derived from responsibility, contract, design, process, construction cost, and schedule management, and a detailed management plan according to the relevant factor was presented.