• 한국방재학회 논문집
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• 제8권3호
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• pp.105-115
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• 2008

도시화로 인한 유출량의 증가 및 도달시간의 단축은 도시재해의 한 원인이 되고 있다. 이를 막기 위하여 도시 배수유역내에 저류지를 설치하여 첨두도달시간을 지연시키고 방류량은 하수관거의 통수능 이하로 조절하는 방안을 활용하고 있다. 저류지를 설계 운영함에 있어서 사용되는 수문모형은 일반적으로 계획모형, 설계모형 및 운영모형으로 분류되고 있다. 본 연구에서는 재해영향평가서 22개소의 기 설계된 저류지를 분석대상으로 하여 여러 가지 저류지 계획모형의 적합성을 검토하였다. 저류지 계획모형으로는 삼각형, 사다리꼴 설계수문곡선과 경험적 공식을 이용한 11가지의 모형을 적용하였다. 저류지 계획모형의 분석에서 on-line 저류지의 경우는 사다리꼴 형태 설계수문곡선을 채택하고 있는 이종태 등 모형(1991)의 결과가 대상 저류지의 실저류량과 가장 유사함을 보였고, off-line 저류지의 경우는 삼각형 형태 설계수문곡선을 채택하고 있는 Abt and Grigg 모형(1978)의 결과가 비교적 양호한 결과를 보이는 것으로 나타났다.

• 지역사회간호학회지
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• 제14권4호
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• pp.617-628
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• 2003

Purpose: This study was to analyze the quality of life of married women practicing a natural family planning method based on given parameters in order to obtain some specific basic data for developing holistic programs to enhance the quality of life of married women practicing natural family planning. Methods: The subjects of this study were selected from married women who had been practicing natural family planning over two years. Data were collected from May 20 2001 to March 5 2002 using a structured questionnaire and interviews. The total number of subjects was 239. Collected data were analyzed using PC-SAS, which utilized descriptive statistics. In addition, LISREL 8.0 program was used to utilize covariance matrix. Results: The hypothetical model was reasonably fitted to commonly accepted data. Revision was required for the x2 value and RMR, and the model was revised by eliminating 6 paths. The revised model was fit well for commonly accepted data (x2 = 86.26, GFI = 0.97, NFl = 0.98, NNFI = 0.99, AGFI = 0.96, RMR = 0.02, CN= 422). Variables that influence the practice of natural family planning were communication of spouses, knowledge about natural family planning, self-efficacy and perceived benefits. Variables that control the quality of life were self-efficacy, internal health locus of control, attitude toward natural family planning, communication of spouses, perceived benefits and natural family planning behaviors. Conclusions: These findings prove that the quality of life of married women practicing natural family planning can be improved through developing programs that enhances communication of spouses, self-efficacy and perceived benefits.

• 보건교육건강증진학회지
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• 제27권3호
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• pp.59-66
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• 2010

Objectives: This paper aims to describe a public health planning model, Mobilizing for Action through Planning and Partnership(MAPP), and to discuss its application in Korea with a specific focus on the Local Public Health System (LPHS) component of MAPP. Methods: Literature content review was performed on research papers on MAPP development and application, MAPP handbook and guides, the guidelines for the 5th Phase Community Health Plan, and a research report on public health center evaluation system. Results: MAPP has been applied to public health planning (the 5th Phase Community Health Plan) and a performance evaluation system for public health center in Korea. The current application is limited to the early stages of the MAPP. Limited or partial application affects the integrity of the model. Follow-through should be strengthened especially for evaluation planning. Conclusion: Systems thinking approaches should be considered for the development of LPHS and strengthening logical and practical linkage between planning and evaluation of community health planning.

• 국토계획
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• 제53권7호
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• pp.67-86
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• 2018

This paper attempted to analyze impacts of transition in electricity generation system on a national economy and environmental level in Korea using a recursive computable general equilibrium(CGE) model. In particular, the paper presented a hybrid model combining the top-down CGE model with the bottom-up model which describes the structure of electricity production in detail. The impacts were analyzed by two policy scenarios base on the basic plan for electricity supply and demand proposed by the Korean government. As a result, the paper specifically showed that there exists a trade-off relationship in the policy-making between economic efficiency and environmental level. The paper also suggested that the transition in electricity generation system should be done more gradually and carefully.

• Industrial Engineering and Management Systems
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• 제9권3호
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• pp.227-241
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• 2010

A memory module industry's supply chain usually consists of multiple manufacturing sites and multiple distribution centers. In order to fulfill the variety of demands from downstream customers, production planners need not only to decide the order allocation among multiple manufacturing sites but also to consider memory module industrial characteristics and supply chain constraints, such as multiple material substitution relationships, capacity, and transportation lead time, fluctuation of component purchasing prices and available supply quantities of critical materials (e.g., DRAM, chip), based on human experience. In this research, a directed graph-based supply network planning (DGSNP) model is developed for memory module industry. In addition to multi-site order allocation, the DGSNP model explicitly considers production planning for each manufacturing site, and purchasing planning from each supplier. First, the research formulates the supply network's structure and constraints in a directed-graph form. Then, a proposed genetic algorithm (GA) solves the matrix form which is transformed from the directed-graph model. Finally, the final matrix, with a calculated maximum profit, can be transformed back to a directed-graph based supply network plan as a reference for planners. The results of the illustrative experiments show that the DGSNP model, compared to current memory module industry practices, determines a convincing supply network planning solution, as measured by total profit.

• 산업경영시스템학회지
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• 제42권2호
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• pp.9-17
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• 2019

In order to deal with high uncertainty and variability in emergency medical centers, many researchers have developed various models for their operational planning and scheduling. However, most of the models just provide static plans without any risk measures as their results, and thus the users often lose the opportunity to analyze how much risk the patients have, whether the plan is still implementable or how the plan should be changed when an unexpected event happens. In this study, we construct a simulation model combined with a risk-based planning and scheduling module designed by Simio LLC. In addition to static schedules, it provides possibility of treatment delay for each patient as a risk measure, and updates the schedule to avoid the risk when it is needed. By using the simulation model, the users can experiment various scenarios in operations quickly, and also can make a decision not based on their past experience or intuition but based on scientific estimation of risks even in urgent situations. An example of such an operational decision making process is demonstrated for a real mid-size emergency medical center located in Seoul, Republic of Korea. The model is designed for temporal short-term planning especially, but it can be expanded for long-term planning also with some appropriate adjustments.

• Journal of Mechanical Science and Technology
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• 제20권1호
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• pp.19-28
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• 2006

This paper describes rapid prototyping (RP) and reverse engineering (RE) application for orthopedic surgery planning to improve the efficiency and accuracy of the orthopedic surgery. Using the symmetrical characteristics of the human body, CAD data of undamaged bone of the injured area are generated from a mirror transformation of undamaged bone data for the uninjured area. The physical model before the injury is manufactured from Poly jet RP process. The surgical plan, including the selection of the proper implant, pre-forming of the implant and decision of fixation positions, etc., is determined by a physical simulation using the physical model. In order to examine the applicability and efficiency of the surgical planning technology, two case studies, such as a distal tibia comminuted fracture and an iliac wing fracture of pelvis, are carried out. From the results of the examination, it has been shown that the RP and RE can be applied to orthopedic surgical planning and can be an efficient surgical tool.

• 산업경영시스템학회지
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• 제33권1호
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• pp.71-79
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• 2010

This paper addresses capacity expansion planning model of distribution center under usability of public distribution center. For discrete and finite time periods, demands for distribution center increase dynamically. The capacity expansion planning is to determine the capacity expansion size of private distribution center and usage size of public distribution center for each period through the time periods. The capacity expansion of private distribution center or lease usage of public distribution center must be done to satisfy demand increase for distribution center. The costs are capacity expansion cost and excess capacity holding cost of private distribution center, lease usage cost of public distribution center. Capacity expansion planning of minimizing the total costs is mathematically modelled. The properties of optimal solution are characterized and a dynamic programming algorithm is developed. A numerical example is shown to explain the problem.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.131-134
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• 2005

This paper presents a computer-aided simulation and robotic-assisted execution technology of external fixation method to achieve fracture reduction and deformity correction in long bones. Combining the kinematic analysis with a graphic model of the tibia and the fixator allowed 3D simulation and visualization of the adjustments required to reduce fracture or correct bone deformity as a pre-operative planning tool. The developed robot model provided accurate deformity correction with small residual deformity based on the results of the planning. By incorporating the robot model with image-guided system and computer-aided planning, the integrated system could be useful for computer-aided pre-operative planning and robotic-assisted execution in fracture treatment and bone deformity surgery.

• 전기학회논문지
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• 제61권7호
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• pp.957-965
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• 2012

Korean government has been preparing the introduction of Emission Trading as part of the framework convention on Climate Change as a relief of negative downstream effect over electricity industry. This paper develops a mathematical model amenable to analyzing the economic impact of introduced emission trading system on the national generation expansion planning. The developed model was also employed with a case study to verify its applicability.