• 산업경영시스템학회지
• /
• 제38권1호
• /
• pp.110-117
• /
• 2015

Spare part management is very important to products that have large number of parts and long lifecycle such as automobile and aircraft. Supply chain must support immediate procurement for repair. However, it is not easy to handle spare parts efficiently due to huge stock keeping units. Qualified forecasting is the basis for the supply chain to achieve the goal. In this paper, we propose an agent based modeling approach that can deal with various factors simultaneously without mathematical modeling. Simulation results show that the proposed method is reasonable to describe demand generation process, and consequently, to forecast demand of spare parts in long-term perspective.

• 한국BIM학회 논문집
• /
• 제9권2호
• /
• pp.21-28
• /
• 2019

Recently, many scan projects are gradually increasing for maintenance, construction. The scan data contains useful data, which can be generated in the target application from the facility, space. However, modeling the scan data required for the application requires a lot of cost. In example, the converting 3D point cloud obtained from scan data into 3D object is a time-consuming task, and the modeling task is still very manual. This research proposes Scan-to-Geometry Mapping Rule Definition (S2G-MD) which maps point cloud data to geometry for irregular building plane objects. The S2G-MD considers user use case variability. The method to define rules for mapping scan to geometry is proposed. This research supports the reverse engineering semi-automatic process for the building planar geometry from the user perspective.

• 대한조선학회논문집
• /
• 제58권5호
• /
• pp.314-321
• /
• 2021

In the existing whole ship analysis, topside was modeled as mass element. However recently, the topside is modeled as beam element due to the owner's requirement to improve the maturity of the whole ship FE model. To follow the owner'srequirement, detailed information for topside drawing and modeling, which may delay analysis schedule, is needed. However, it is hard to respond effectively to this matter due to the lack of study on the topside from the hull perspective. Therefore in this study, the effect of the topside on the hull is investigated when the topside is modeled as a mass element or beam element respectively. In addition, the interface modeling method is analyzed to verify modeling method used in the existing whole ship analysis. The results indicate that the interface and topside modeling method used in existing whole ship analysis are appropriate. This conclusion will be the technical basis for responding to owner's requirement about the topside modeling method.

• 한국물환경학회지
• /
• 제36권6호
• /
• pp.636-650
• /
• 2020

A modeling system that can consider the overall water environment and be used to integrate hydrology, water quality, and aquatic ecosystem on a watershed scale is essential to support decision-making in integrated water resources management (IWRM). In adapting imported models for evaluating the unique water environment in Korea, a platform perspective is becoming increasingly important. In this study, a modeling platform is defined as an ecosystem that continuously grows and provides sustainable values through voluntary participation- and interaction-of all stakeholders- not only experts related to model development, but also model users and decision-makers. We assessed the conceptual values provided by the IWRM modeling platform in terms of openness, transparency, scalability, and sustainability. I We also reviewed the technical aspects of functional and spatial integrations in terms of socio-economic factors and user-centered multi-scale climate-forecast information. Based on those conceptual and technical aspects, we evaluated potential modeling platforms such as Source, FREEWAT, Object Modeling System (OMS), OpenMI, Community Surface-Dynamics Modeling System (CSDMS), and HydroShare. Among them, CSDMS most closely approached the values suggested in model development and offered a basic standard for easy integration of existing models using different program languages. HydroShare showed potential for sharing modeling results with the transparency expected by model user-s. Therefore, we believe that can be used as a reference in development of a modeling platform appropriate for managing the unique integrated water environment in Korea.

• 한국학교수학회논문집
• /
• 제22권2호
• /
• pp.133-161
• /
• 2019

본 연구에서는 일반 중학교 3학년 학생들의 일상적인 수업에서 집단 창의성 발현을 통해 수학적 모델링 활동을 지원한 사례를 분석하였다. 이를 위해 첫째, 선행연구 분석을 통해 사회문화적 관점에 따른 집단 창의성의 의미와 수학적 모델링의 사회문화적 특성을 확인하였다. 둘째, 4명씩 5모둠으로 구성된 한 학급에서 실험을 수행한 뒤, 집단 창의성 발현이 잘 이루어진 한 모둠의 사례에 초점을 둔 사례 연구를 수행하였다. 그 결과, 첫째, 수학적 모델링의 각 단계별로 다양한 유형의 상호작용이 나타났으며, 수학적 모델링의 단계와 발생한 상호작용의 유형에 따라 다양한 창의적 시너지가 관찰되었다. 즉, 수학적 모델링 활동에서 집단 창의성 발현이 관찰되었다. 둘째, 발현된 집단 창의성은 수학적 모델링의 각 단계의 수행을 지원하였다. 이때, 수학적 모델링의 단계와 발생한 상호작용에 따라 각기 다른 방향으로 수학적 모델링 활동을 지원하였다.

• 대한지역사회영양학회지
• /
• 제17권4호
• /
• pp.494-503
• /
• 2012

The purpose of this study was to examine the effect of sustainability management (SM) at coffee houses on customers' store image and behavioral intention. In addition, customers' willingness to pay a premium for sustainable coffee houses was studied. During October 2011, a web survey was conducted via an on-line research company with customers aged 20 to 39 visiting one of the top five coffee houses in Korea at least once a month. A total of 300 targeted customers responded and all the data were analyzed. An exploratory factor analysis derived two dimensions of SM: SM in Social and Environmental Perspective and SM in Economic Perspective. The result of structural equation modeling indicated that SM in Economic Perspective at coffee houses had a significant positive effect on customers' behavioral intention with mediating effect by store image, but SM in Social and Environmental Perspective did not have such effect. Approximately one-third (31%) of the respondents were willing to pay a premium for a sustainable coffee house in a scenario. approximately 84% of the respondents unwilling to pay a premium for the sustainable coffee house chose the cost-related reasons including "Coffee price at the coffee house that they most often visit is already expensive (62.3%)" for such unwillingness. The results of this study showed that SM of coffee houses, especially that in Economic Perspective, could contribute to store image, and therefore increase customers' favorable behavioral intention, although the additional cost resulted from such SM practices might not be easily accommodated by customers.

• 대한원격탐사학회지
• /
• 제18권4호
• /
• pp.233-242
• /
• 2002

본 논문에서는 위성 궤도 정보를 사용하지 않는 새로운 에피폴라 기하모델을 제안하고, 선형 Pushbroom 영상의 에피폴라 기하모델을 위한 방법들과 정량적으로 비교 분석을 한다. 정량적 분석에 사용된 에피폴라 기하모델은 항공영상에 적용되는 중심투영(Perspective) 센서의 에피폴라 기하모델, Gupta와 Hartley의 에피폴라 기하모델, 궤도정보를 사용하는 Orun과 Natarajan 센서모델의 에피폴라 기하모델이다. 대전과 보령의 SPOT 영상과 대전과 논산의 KOMPSAT 영상에 대해 지상기준점, 지상기준점에서 생성한 모델링데이터, 위성 궤도정보 및 숙련된 운영자가 추출한 독립검사점을 사용하여 실험을 수행하였다. 실험 결과에 따르면 중심투영 센서의 에피폴라 기하모델과 Gupta와 Hartley의 에피폴라 기하모델은 평균적으로 1픽셀 이내의 정확도를 보였으나 일부 검사점에서 높은 오차를 보였다. 제안한 에피폴라 기하모델은 중심투영 센서나 Gupta와 Hartley의 에피폴라 기하모델보다 정확도가 높고, 궤도 정보를 사용하는 Orun과 Natarajan 센서 모델의 에피폴라 기하모델과 유사한 정확도를 보였다.

• 한국경영과학회지
• /
• 제33권3호
• /
• pp.77-92
• /
• 2008

Commonality strategy is a popular design practice in designing a product line as it enables the firm cost saving and simplification in design, manufacturing, and distribution processes. However the issue of commonality has been mostly analyzed from a profit maximizing firm's perspective and, to our knowledge, there is no literature that deals with the issue from a different perspective. in this paper, we consider the issue of commonality strategy from a social welfare maximization perspective, and argue that commonality strategy used in designing of public goods can bring certain benefits not just for a firm but also for consumers, i.e., for society as a whole. While we assume certain cost saving in production process due to economies of scale under commonality strategy, we conceptualize two different effects of commonality strategy, utility effect due to cost saving and weighted-averaging effect, and show how these two effects interplay to determine the design of common attribute and desirability of commonality strategy. We also discuss how the implementation of commonality strategy differs under different objectives of a product line designer : social welfare and firm's profit maximization.

• 한국조리학회지
• /
• 제22권6호
• /
• pp.33-51
• /
• 2016

The hotel industry needs to make the competitive advantage difficult to be imitated in order to remain sustainable in competitive business circumstances. Front-line employees' service-oriented citizenship behaviors(OCBs) can be such a strength from the perspective of organizational system. With an aim of investigating the antecedents of the hotel front-line employees' service-oriented OCBs, this study proposed a theoretical framework linking authentic leadership to service-oriented OCBs with goal commitment as a mediator. A total of 260 cases without missing values have been used for the final analysis and structural equation modeling (SEM) is employed using the SPSS and AMOS 7. It was first found that self-awareness and relational transparency of authentic leadership made a significant impact on their goal commitment while balanced processing and moral perspective failed to influence them. Second. goal commitment influenced all sub-factors of service-oriented OCBs. Third, moral perspective and relational transparency of authentic leadership significantly influenced service-oriented OCBs while self-awareness and relational transparency failed to make it. Finally, goal commitment significantly makes an intervening effect for the relationship between self-awareness & service-oriented OCBs and relational transparency & service-oriented OCBs but failed to intervene the other relationships. The results provide theoretical and practical implications regarding directions of leadership styles and HR management in the hotel industry and suggestions for the further extended studies.

• 한국BIM학회 논문집
• /
• 제10권3호
• /
• pp.12-21
• /
• 2020

From the perspective of the client, the value of information for use in facility management is very low at the point of use. This is because the facility owner, who is a non-professional, cannot accurately request necessary information from the perspective of long-term facility life cycle management. The purpose of this study is to define the information necessary for facility management and to analyze the project operation method to procur this information to the client using BIM. To this end, this study analyzed the role of client and contractor, project delivery process, standards, and submissions in the BIM-based procurement area through USACE Air Force Hospital project case analysis. As a result of the analysis, if the client, who is the subject of facility operation, defines in advance the type and input method of necessary information in the operation stage, the client can receive the BIM optimized for operation from the contractor. The results of this study can be used to establish standards for receiving information necessary for establishment of procurement process and facility management of public institutions considering BIM introduction.