• 방사성폐기물학회지
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• 제19권3호
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• pp.297-306
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• 2021

In this study, basic strategies for the decommissioning and site remediation of the Fukushima Daiichi Nuclear Power Station (FDNPS) were investigated. Six scenarios were formulated based on two of the three decommissioning strategies of nuclear power plants defined by the International Atomic Energy Agency (IAEA): immediate dismantling and deferred dismantling. A multicriteria decision analysis was performed to analyze the preferences of the options from the viewpoints of the timeframe to complete decommissioning, the resulting waste, the site usability, and the availability of the radioactive waste disposal route. The same six scenarios were applied to both the FDNPS and the nuclear power plants that ceased operation after a normal plant life cycle for comparison. For the FDNPS, the decommissioning project involved fuel debris retrieval, dismantling, and site remediation. The analysis results suggest that the balance between the amount of waste and the time to achieve the end state may be one of the most critical factors to consider when planning the decommissioning and site remediation of the FDNPS.

• KIEAE Journal
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• 제10권5호
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• pp.139-150
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• 2010

Until now, the eco-friendly construction (green construction) has been focused on reducing environmental impacts in use(operation and maintenance) phase. Considering the environmental influence along the life cycle of construction project, the impact in execution phase is rather lower than that in use phase. However, that impact is thought to be greatly decreased by well-organized activities. Based on its urgency and requirement for timely action, this study aimed to discuss the greenhouse gas (GHG) reduction plan in execution phase from a broad perspective. To achieve this purpose, the green building rating systems in domestic and foreign countries have been reviewed, and the practice in Japan was investigated. In order to improve current on-site greenhouse gas management, the integration among construction phases, participants, and environmental factors, and institutional supports are required as well as the contractor's efforts.

• International Journal of Computer Science & Network Security
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• 제21권2호
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• pp.130-141
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• 2021

This paper is in the intersection of software engineering and system engineering, two intimately intertwined disciplines. A dominating theme in this paper is the integral conceptualization of systems at large, as well as an underlying concern with software systems. In the software development life cycle, challenges still exist in translating requirements into a design artifact and then into an implementation (e.g., coding), then validating the results. From our perspective, software engineering requires an integrating paradigm toward a unified modeling orientation. Many methodologies, languages, and tools exist for facilitating system development processes. This paper is a venture into project development. To focus the materials, we concentrate on Harel's novel (and classic) development environment, which integrates a scenario-based engineering object orientation and statecharts through developing a railcar system. The railcar system is used as a detailed sample of translating requirements into a design artifact and then into an implementation, then validating the result. The project is re-cased as a single integrated modeling endeavor to be contrasted with the scenario and statecharts' development. The result of this scheme is an enriched understanding through experimenting with and contrasting various development methods of software projects.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.386-389
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• 2013

Under climate change and urbanization, rainwater harvesting (RWH) systems are emerging as an alternative source of water supply because of growing concern about water sustainability. RWH systems can satisfy the various watering needs and provide the environmental benefits of lessening the damages from flood, drought, and runoff. The economic success of a RWH system is vitally concerned with the determination of the design capacity of storage tank to be built in the system. The design capacity is determined by the factors of average annual rainfall, period of water scarcity, and water price during the whole life-cycles. Despite the high uncertainties inherent in these factors, the current engineering design of RWH system construction often assumes that storage tanks should be built all at once. This assumption implicitly ignores the managerial flexibility in responds to the future as new information comes out-the right to build storage tanks stage by stage depending on the evolution of demand. This study evaluates the value of a multistage storage tank construction using a real option approach. A case study involving a typical RWH system construction in Jeonju, the Republic of Korea is conducted. The managerial flexibility obtained from the real option perspective allows engineers to develop investment strategies to better cope with the issue of water sustainability.

• 대한토목학회논문집
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• 제29권2D호
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• pp.235-244
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• 2009

최근 건설공사에서 설계VE 업무의 중요도는 더욱 증대되고 있으며, 일상적인 관리활동으로 도입되고 있다. 건설공사에서 설계VE는 기본설계와 실시설계 두 번에 걸쳐 진행된다. 설계VE의 효과를 높이기 위해서는 발주자 및 사용자 요구사항과 설계의 라이프 사이클 측면에서 기본설계와 실시설계 VE 결과를 상호 연계할 필요가 있다. 본 연구에서는 설계VE 업무를 효율적으로 수행하기 위한 연속적 설계VE 프로세스를 제시한다. 제시된 모델에서는 Follow-up(후속조치) 활동을 강조하여 VE 성과 분석 중심의 업무모델을 수립했다. 제시된 모델을 설계VE 실무사례에 적용하여 효율성을 검증했다. 실제 VE 업무에 적용한 결과 첫째, 발주자 및 사용자 요구사항을 체계적 반영할 수 있었으며; 둘째, VE 제안내용의 반영계획 수립을 통한 발주자 의사결정을 지원하고; 셋째, 설계업무 인터페이스를 강화하며; 넷째, 반영결과 추적을 할 수 있었다. 이러한 효과를 고려할 때 본 연구에서 제시한 설계VE 업무모델은 설계의 라이프사이클에서 설계VE 결과를 추적하고 업무분석을 체계화하는데 기여할 것으로 기대된다.

• 한국경영과학회지
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• 제26권4호
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• pp.1-21
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• 2001

The purpose of this stuffy is to derive critical success factors for ERP system implementation by integrating managerial, technical. human resource and organizational culture factors welch have been proposed as influencing factors for the performance of ERP system implementation in previous studios. Especially, this stuffy divides ERP system implementation process into preparation stave, implement stage and settle-down and stabilization stave, and then derives critical success factors in each stage. The data for empirical analysis of the research model are collected from 64 companies and the respondents for questionnaire consist of ERP system implementation project managers and user department managers in companies which have already operated it after ERP system installation. The main results of this study are as follows. First, it derives 27 success factors through comprehensive review of various factors which may affect ERP system implementation performance, and categorizes them into one of three stapes preparation stave, implement stage, and settle-down and stabilization stage. Second, the relationship between many success factors at each stave (preparation stave, implement stage, and settle-down and stabilization stave) and performance variables is tested. As a result, the significant correlations between many success factors at each stage and ERP system implementation performance are found, and the difference among success factors in the degree of influencing the system performance is significantly shown. finally, the relationship between process-oriented performance variables and result-oriented performance ones is tested. As a result, it is found that there is significant correlation between process-oriented performance variables except for one variable-project resource management appropriateness - and result-oriented performance ones. The theoretical contribution of this study is to derive a comprehensive model of critical success factors for implementing ERP system project from the system deve1opment life cycle perspective, and empirically test it through field survey with a wide range of data collection. And, the practical implication of this study is to present the desirable guidelines for performing ERP system implementation project successfully.

• Journal of Information Technology Applications and Management
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• 제27권1호
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• pp.97-109
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• 2020

It is expected that the Fourth Industrial Revolution will have a great impact on the manufacturing industry, especially as it will cause big changes in industry, economy as well as socio-cultural. To cope with this situation, each country is promoting the policy of cultivating its manufacturing. This study derives the effect of the fourth industrial revolution on product lifecycle management for smart manufacturing through expert's cognitive analysis. The knowledge area of product lifecycle management is divided into Project Portfolio Management, Collaborative Product Design, Customer Needs Management, Direct Material Sourcing, Product Data Management, Digital Manufacturing & Engineering, R&D Foundation, New Product Development through academic research. The expert survey was conducted in five different perspectives: Importance, Insufficiency. Then, using the results of the survey and the academic research the implication about Product Lifecycle Management were derived. The significance of this study is that it derives the change areas and factors of the product life cycle management knowledge domain in preparation for the fourth industrial revolution according to the perspective of importance and insufficiency.

• 한국멀티미디어학회논문지
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• 제6권4호
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• pp.685-697
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• 2003

The Web based multimedia programmes/courses are becoming widely available in recent years. Most of these courses focus on Behaviorist way of learning, which does not promote deep learning in any way. For Adults this approach further incapacitated, as it does not satisfy Andragogical needs. The search for Constructivist way of learning through the web applied to Indian conditions led to need for developing a curriculum development approach that would promote construction of knowledge through web based collaboration. This paper attempts to reengineer existing curriculum development processes and lays out a framework of‘Problem Based Online Learning (PBOL)’curriculum design. In this context, entire curriculum development life cycle is evolved and explained. This is a part of doctoral work (Ph.D), which is in progress and being undertaken by K.James Mathai, and guided of Dr.D.S.Karaulia.

• 한국수자원학회논문집
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• 제40권7호
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• pp.503-510
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• 2007

현재 하천정비는 하천생태계에 초점을 맞추고 자연하천에 근접할 수 있는 공법을 사용하는 자연 친화적인 하천정비가 비약적으로 늘어나고 있다. 하지만 자연 친화적인 하천정비는 아직까지 많은 기술이 축적되지 않아 어떤 공법이 하천환경에 적합한 공법인지가 확립되어 있지 않은 상태이다. 또한, 값비싼 공법을 적용하여 하천을 자연 친화적으로 정비하였다. 하더라도 하천정비에 대한 종합적인 평가방법이 확립되어있지 않아 자연 친화적 하천정비에 대한 타당성을 객관화하지 못하고 있다. 따라서 하천환경기능을 포함한 종합적이고 다양한 평가방법을 개발하여 정비하천에 대한 평가를 수행할 필요가 있다. 본 연구에서는 자연 친화적으로 정비된 하천에 대해 정비의 타당성과 효율성을 평가하는 평가방법에 대해 연구하였다. 전라북도 순창읍에 있는 경천을 대상으로 2000년${\sim}$2000년 월별로 모니터링을 수행하여 자료를 수집하였으며, 수집된 자료를 분석하여 하천환경기능을 종합적으로 고려할 수 있는 방법으로서 하천자연도 평가, 전 과정 평가, 어메니티 평가, 경제적 편익 평가 등의 평가방법을 개발하였다. 본 연구에서 개발한 4가지의 평가방법은 하천정비사업의 종합적이고 정량적인 평가를 수행할 수 있는 방법으로 판단된다. 하지만 하나의 하천을 대상으로 개발된 방법을 적용하였기 때문에 차후 각 하천마다 갖는 특성을 고려하여 하천정비의 평가방법이 요구된다.

• 한국건설관리학회논문집
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• 제19권4호
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• pp.12-20
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• 2018

최근 시설이 대형화, 복합화, 첨단화됨에 따라 건축물 운영단계에서 수행되는 자산관리 업무의 중요성이 대두되고 있으며, 이에 따라 자산관리 업무의 범위가 확대되고, 요구 정보가 증가하고 있다. 그러나 건설 생애주기 단계 간 업무 중첩, 협업 배제 등으로 인한 비효율적인 정보교환이 이루어지며, 이로 인해 비용 손실이 발생된다. 이러한 생애주기 간 낮은 정보호환성 문제는 전 생애주기 관점의 건설 정보관리를 통해 보완할 수 있다. 각 생애주기 단계 참여자의 건설정보 관리는 발주자의 건설정보 이양요건을 통해 구체화된다. 이에 본 연구는 발주자 관점의 자산관리 개념 정리와 생애주기 간 정보호환성 개선을 목적으로, 자산관리의 유형분류, 자산관리 업무기능, 그리고 건설정보 이양요건 항목의 가치 평가방법론을 제시하였다. 본 연구의 방법론을 이용하여 시공자가 발주자에게 제공하는 '인수인계 항목'을 발주자의 이양요건으로 참조하여 평가하였다. 그 결과 건축물 정보, 도면 등의 순서로 가치 순위가 도출되었다. 본 연구를 통하여 사업 초기단계에서 발주자의 건설정보 이양요건 도출, 그리고 정보이양(Information Handover)의 성과측정을 위한 기초자료로써 활용될 수 있다.