• Journal of Families and Better Life
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• v.12 no.2
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• pp.229-238
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• 1994

본 연구는 시간자원의 중요성이 증가하는 현대사회에서 주부가 지각하는 시간압박 감이 점차 높아질것으로 예상되는 가운데 시간압박감이 소비자행동에 어떻게 작용하고 그로 인한 문제점은 무엇인지 밝혀보려는 의도에서 수행되었다. 서울시에 거주하는 주부 546명을 대상으로 시간압박지각정도를 측정하고 이를 바탕으로 소비자집단을 분류된 소비자 집단 사이에 인구.사회 경제적특성과 시간 절약형 내구제의 구매의사결정 과정의 차이가 있는지 분석하였다. 그 결과 시간 압박지각 정도에 따라 고.중.저의 세집단으로 구분되었는데 중간집단에 가장 많은 응답자가 포함되었고 높게 지각하는 집단에 가장 적은 응답자가 포함되었다. 그러나 기존의 연구와는 달리 취업주부의 18.7%가 시간압박을 낮게 지각하는 집단에, 그리고 전업주부의 6.8%가 시간압박을 높게 지각하는 집단에 분류되어 취업주부가 시간압박을 높게 지각하는 전형적인 소비자집단이 아닐수 있음을 발견하였다. 집단별 인구.사회경제적 특성과 시간절약형내구재의 구매의사결정과정의 차이도 부분적으로 밝혀졌으나, 예상과 달리 시간압박감을 높게 지각하는 집단의 시간절약형내구재의 소유와 사용이 오히려 낮게 나타났다.

• Journal of Korean Foot and Ankle Society
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• v.18 no.1
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• pp.8-13
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• 2014

Amputation of diabetic foot ulcer and infection is a critical modality for saving a patient's life from life threatening infections or ischemic limbs. However, it can cause serious handicaps or complications, such as lifetime shortening and re-amputation of the other limb. The minimal amputation is the main goal of amputation in diabetic patients. However, insufficient amputation can have a harmful effect on patients. The decision of amputation is very difficult and should be made using multidisciplinary approaches. All aspects of the patient's situation, including vascular status, degree of infection, and medical conditions should be considered. The foot surgeon should keep in mind the notion that proper amputation can lead to a new life for diabetic foot patients.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• v.18 no.4
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• pp.283-294
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• 2014

In this paper we study consumption-labor supply decision of an agent who prepares for retirement at a known time in the future. The agent is assumed to have a preference which is represented by the von Neumann-Morgenstern utility function in which the felicity function has constant relative risk aversion over the composite of consumption and leisure. The composite is obtained by the Cobb-Douglas function. A general problem has been studied by Bodie et al. (2004). We contribute to the literature by deriving the Slutsky equations and conducting comparative statics. In particular, we show that wealth effect can exhibit an interesting property depending upon the time until retirement, as the interest rate increases.

• Magazine of the Korean Society of Agricultural Engineers
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• v.43 no.5
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• pp.83-92
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• 2001

As a result of the recent water resources crisis, development of water management automation system becomes important. This system should be developed with open architecture in order to flexibly meet the spacial and time change of irrigation water demand. Thereby, water management automation system requires open architecture and suitable software program. This study presents an application of object-oriented methodology for Open Water Management Program(OWMP). Accordingly, OWMP provides a high degree of reliability which allows modification of parameters by change of region or time to be possible. OWMP consists of Data Base Management System(DBMS) and Model System. DBMS makes it possible to analyze data related with planning water schedule and establishing database. Model System calculates reservoir inflow, reservoir effluent and basin water demand. An operator decides the reservoir operation with results of Model System and DBMS. OWMP could be adapted to the planning and decision for saving water.

• Journal of Korea Port Economic Association
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• v.22 no.2
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• pp.61-82
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• 2006

In order to cope with improvement of labor cost and cargo volume, Korean ports, especially Busan port, are in need of many new facilities. Of course, current facilities should be fully used, and at the same time it needs to make every effort to maximize its productivity as well as cost saving. To this end, this study has decided to focus on automatic yard operation suitable to the domestic container terminal environments, making a survey of many advanced container terminals, trying to find out their common factors, and finally suggesting several alternatives based on the combination of these factors. Also, this study has suggested the present value of initial investment and operating cost by alternative, and at the same time presented the relationship between cargo handling volume and cost/revenue of the optimal alternative, so that it may be of help in decision making.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.2242-2249
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• 2008

A severe problem in VE study of a project is to reduce value due to loss of performance, caused by focusing on cost reduction. Also a lack of understanding performance concept, no trial VE workshop as well as cost saving-based policy have not satisfied customer needs. A efficient VE job plan for especially large scale railroad construction project is proposed in this study. This study developed a more objective performance evaluation system for value engineering study of mega projects and suggested a systematic process of performance quantitative analysis for value improvement. The proposed performance measurement method would be very useful for better communication and consensus between decision makers and VE team.

• IE interfaces
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• v.13 no.2
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• pp.234-245
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• 2000

In this paper, the conceptual framework of IBS(Intelligent Building Systems) is redefined, and we propose two ANP(Analytic Network Process) models for ranking IBS. Traditional models have ranked IBS according to technical features or the number of elements in IBS. But, we consider relative functional importance among IBS elements for efficient building operation. According to the structure of interactive-relationship among IBS elements, we present two types of model. The one is Model A that is composed of both hierarchical and network structures. It has $12{\times}12$ supermatrix consists of interdependent relationship between 6 benefit elements(Productivity, Saving, Safety, Convenience, Pleasantness, Environment Affinity) and 6 IBS elements(Building Operation, Security, Safety, Telecommunication(TC), Office Automation(OA), other elements). Each of 6 IBS elements has subelements in hierarchical structure. The other is Model B that has $25{\times}25$ supermatrix consists of interdependent relationship between 6 benefit elements and 19 IBS sub elements. Merits and demerits of each model are discussed in detail.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.540-543
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• 2012

최근에 녹색 IT의 일환으로 IT 장비에서 소비하는 에너지 크기를 감소시킴으로써 발생하는 탄소발생률을 줄이고, 장비 운용 비용을 낮추는 연구가 각광을 받고 있다. 그에 따라 본 논문에서는 차세대 통신망의 강력한 후보로 예상되는 광 버스트 스위칭 망에서 에너지 절감 기법 중 하나인 저 전력대기 방식을 사용할 때 발생하는 에너지 소비량에 대한 수식 모델을 제안한다. 제안된 수식 모델에서는 입력되는 트래픽 패턴을 고려하여 가져갈 수 있는 상태천이확률을 구하고 이에 따른 에너지 소비량을 예측해 볼 수 있다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.489-492
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• 2016

Transportation in the logistics, many business organizations are engaged in monitoring and tracking the vehicles in order to improve logistics services, reduce expenses and secure security in cargo transportation. It is saving time and money by tracking and monitoring vehicles which transport cargo in supply chain of logistics. Therefore the main issue of delivery flow is to improve services, and ensure the safety in transportation system. This article suggests the tracking and monitoring model to keep safety transports on ICT network. It focuses on precise delivery control by monitoring and tracking vehicles to save time and costs. The status of product movement is analyzed for proper decision making. The vehicle embedded with RFID is automatically tracked in the movement process by tracking and monitoring model. The main role keeps safety tracking to reduce costs and to deliver products at proper time and location.

• International Journal of Advanced Culture Technology
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• v.7 no.1
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• pp.43-48
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• 2019

The purpose of the study was to examine early childhood teachers' content knowledge of economic education. The subjects, 60 early childhood teachers, were asked to draw concept maps about early childhood economic education. Their concept maps were analyzed in terms of superordinate and subordinate concepts by contents and frequencies. The results were as follows. First, 248 superordinate concepts were shown, and they were categorized into nine representative terms: 'Scarcity and Choice,' 'Decision Making,' 'Monetary Value,' 'Production,' 'Consumption,' 'Distribution,' 'Restrain,' 'Reuse,' and 'Economic Education Activity.' Second, 1,440 subordinate concepts were shown, and 'coin,' 'bill,' 'saving,' 'bank,' and 'money' were frequently shown. Third, the mean numbers of subordinate concepts per superordinate concepts showed that early childhood teachers had more knowledge about 'Consumption,' 'Monetary Value,' and 'Economic Education Activity' than other superordinate concepts. The results showed the need for early childhood teachers to have more systematic and hierarchical pedagogical content knowledge on economic education.