• 산업공학
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• 제19권2호
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• pp.160-167
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• 2006

It is a crucial managerial issue how to manage assembly blocks at shipyard. Based on the project experience in Hyundai Heavy Industries, this study points out the difficulties on the block stockyard operations, formalizes the JIBUN (location) assignment problem for assembly blocks, and develops the JIBUN (location) assignment algorithm whose purpose is to reduce the number of unproductive block moves. Through simulation experiments for various situations, this study demonstrates the usefulness of JIBUN (location) assignment algorithm. In addition, this study examines the impacts of block move sequence rules and of block stockyard layouts on the block stockyard operations.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 춘계 학술논문 발표대회
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• pp.341-343
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• 2012

This study introduces a method for computation of process and operation gap in the specific construction operation(i.e., RC frame construction applying a block-grouping scheme) using CYCLONE-based simulation modeling and analysis technique. Since uncertainty of construction environment exists, a thoughtful production planning is required to effectively deal with a risk resulting in schedule delay in advance. This study presents the concepts of a time delay occurred in a process level and operation level in a operation model, and a method of measuring gap-times in each level while the simulation progresses. It helps a site manager to decide how many segmentation in a construction block is suitable for eliminating unproductive time-delays under the constrained resources (e.g., laborer, equipment). A case study presents a network model representing a three segmented RC frame work, and result obtained from the simulation experiment.

• 한국공간정보시스템학회 논문지
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• 제2권2호
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• pp.117-126
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• 2000

지리정보는 시간이 흐름에 따라 변하는 정보를 계속 저장 유지 및 관리하여야 하기 때문에 데이터의 양이 계속 증가하고 용어간의 관계도 더욱 복잡해진다. 이러한 지리정보의 특성은 네트웍을 통한 정보의 공유 및 재사용을 위해 필요한 데이터 검색을 어렵게 한다. 지리정보의 관리, 해석, 그리고 검색의 효과를 향상시키기 위하여 지리정보분야의 어휘 정의와 분류 그리고 다른 어휘와의 관계를 포함하는 온톨로지를 활용할 수 있다. 본 논분에서는 지리정보 데이터 중 하천 관련 용어간의 온톨로지를 구축하여 지리정보 데이터의 관계에 의한 구조적인 검객이 가능하도록 하였다.

• International Journal of Quality Innovation
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• 제7권1호
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• pp.48-59
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• 2006

The Swedish construction sector has been criticized in media for being corrupted, unproductive and conservative. Several incidents, e.g. cartels, work on the side without paying tax and moisture problems, have had a great deal of attention. Of that reason has the government initiated a number of investigations in order to identify the major problems in the construction industry. Further, they have initiated a development of a tool aimed for (a) to identify risks, (b) to avoid poor quality costs, and (c) to direct towards increased quality and effectiveness in building and civil engineering projects, from a client perspective. The UK Constructing Excellence has often been held up as a model during the debate. However, the Swedish general culture differs from the British, as well as the Swedish system differs from the British. The purpose of this paper is to describe the program for developing the system, including the purposes with the system, identified starting points and demands and the approach/method for the development.

• KDI Journal of Economic Policy
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• 제41권3호
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• pp.1-38
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• 2019

Given capital market imperfections, an entrepreneur can alleviate financial frictions by creating a pyramidal business group in which a parent firm offers its subsidiary firm internal finance. This endogenous creation of pyramidal business groups can beget asymmetric financial frictions between business-group firms and stand-alone firms. I build a model to show that these asymmetric financial frictions can have sizable effects on resource allocation. On one hand, the financial advantage of pyramidal business groups can foster productive firms by incorporating them as subsidiaries. On the other hand, the asymmetrically large amount of external capital controlled by pyramidal business groups can be expended by unproductive business-group firms and push up the equilibrium price of capital. The model suggests that with fine investor protection or low financial frictions, the benefits of pyramidal business groups can be dominated by their costs because the probability of fostering productive subsidiaries diminishes as the efficiency of external capital markets improves, while the prevalence of pyramidal business groups is not attenuated due to their continuing asymmetric financial advantage.

• 대한산업공학회지
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• 제38권2호
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• pp.157-172
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• 2012

In most container terminals, containers are piled up and stored in a yard in order to utilize the space efficiently. Hence, it requires unproductive container-handling operations to retrieve a container that is not placed on the top of a container stack. As a result, to streamline container-loading operations by which containers are transferred from a yard to a vessel, it is necessary to pre-marshal (i.e., shuffle in advance) containers in accordance with container-loading plan. We propose $A^*$ algorithm to find the optimal container-relocation sequence for the intra-bay container pre-marshalling problem. To work out the heuristic estimate for the proposed $A^*$ algorithm, we introduce the container rearrangement problem and obtain the lower bound of the length of the optimal relocation sequence. The performance of the algorithm is validated extensively by the numerical experiments on the problem instances that are given in the previous studies and generated randomly with various parameters.

• 한국항만경제학회지
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• 제21권3호
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• pp.171-189
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• 2005

In order to improve inefficient and unproductive factors and in response to criticisms of the failure in harbor privatization introduced in 1997, the Korean government introduced the Port Authority system, which is commonly adopted in advanced harbors in the world. This research examined the theoretical background of harbor management system and various cases of harbor management in foreign countries. The desirable introduction of Port Authority system must be preceded by the settlement of problems in harbor structure and operation. In addition, the Port Authority Act, which restricts the autonomy of harbor corporations, should be improved for user-centered Port Authority system. Strategies for the successful introduction of Incheon Port Authority are as follows. Firstly it is required to establish consumer-centered harbor operation system. The second requirement is to activate the harbor logistics industry through the development of nearby logistic complexes led by Port Authority and, by doing so, to promote the development of local economy. Thirdly it is essential to lay the foundation of mutual prosperity through developing profitable businesses by linking localities and harbors, and to suggest a crisis control network for Port Authority and local self-governing bodies to cope jointly with crises in logistics and natural disasters.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.13-18
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• 2007

보건복지부의 지원으로 건립하는 부산${\cdot}$경남 최초의 어린이전문병원 건립공사는 양산부산대학교병원과의 연계로 최고시설의 의료타운건립을 목표로 수행중이며 건설사업관리(CM)라는 체계적이고 과학적인 관리기법의 도입 및 적용을 통해 건설프로젝트의 비생산적이고 비효율적인 요소를 제거하여 생산성과 효율성을 향상시키고자 하는 것이다. 이에 본 연구에서는 어린이병원건립사업에 사업관리기법을 설계이전단계부터 턴키업체선정, 시공, 설계VE, PMIS구축, 유지관리단계의 사업 전(全)단계에 적용하여 발생한 효과와 분야별 기술자를 활용한 기본 및 실시설계VE를 통한 사업비 절감 및 공기단축 효과를 제시하고자 한다.

• Journal of Forest and Environmental Science
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• 제35권2호
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• pp.102-114
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• 2019

The issue of sustainable forest management (SFM) continues to emerge as part of the REDD+ mechanism mitigation efforts. Especially for some developing countries, such as Indonesia, forest management is required to provide benefits to the welfare of local communities in addition to forest conservation efforts. This study aims to identify the economic, social, and environmental impacts of community-based forest management (CBFM) implementation activities, which is one of the implementations of SFM at field level. The primary objectives were to find out the impacts of CBFM activities based on local people's perceptions and to identify what factors need to be considered to increase local people's satisfaction on CBFM activities. The data from 6 sub-villages was derived through surveys with local people involved in CBFM activities, interviews with a key informant, and supported by secondary data. The results of the study state that CBFM activities have increased the local people's income as well as their welfare, strengthening the local institution, and help to resolve conflicts in the study area. CBFM has also been successful in protecting forests by rehabilitating unproductive lands and increase forest cover area. By using binary logistic regression analysis, it found that income, business development opportunities, access to forests, conflict resolution, institutional strengthening, and forest rehabilitation variable significantly affected the local people's satisfaction of CBFM activities.

• 영어영문학
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• 제54권4호
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• pp.443-459
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• 2008

This paper examines the discourse of masturbation in modern England and aims to re-draw the map of male sexuality related to such issues as nation, empire, family, and economy. It argues that the discourse of masturbation in modern England reflects national anxieties for the future of empire and an economic concern for unproductive sexual behavior, which were the main factors to transform masturbation into "solitary vice." The anxieties about empire and British dominance were constituted as the core of the anti-masturbation discourse on the boys. The imperial destiny was regarded to depend on the protection of the middle- and upper-class boys from the harmful psychological and physiological effects of masturbation represented in Lawrence's "The Rocking-Horse Winner." In the case of a single male, the concern for masturbation is constructed as a concern about economy, family, and human solidarity. As seen in Eliot's Silas Marner, the act of masturbation was condemned as the fulfillment of illegitimate sexual desire outside the familial sphere and a commercial economy, and thus without the possibility of human community. Silas Marner and Meredith's The Ordeal of Richard Feverel show the ways of reconstituting sexual others as normalized subjects: Boys were forced to be asexual through the regime of surveillance; and a single male was required to enroll in a remedial course on familial respectability.